2005 Rubicon Gas Mileage
#11
Guest
Posts: n/a
Re: 2005 Rubicon Gas Mileage
It has the standard LT 245/75R-16E Goodyear 31" MT/R's mounted on the 16 x 8
Jeep "MOAB" Wheels. And GPS speed matches the speedodometer.
It really is getting ~8.5 - 10 mpg in the city, using the "crude" fill-up
gas pump/mileage method.
"wrangler" <ricktucker@charter.net> wrote in message
news:1115056350.769743.16110@g14g2000cwa.googlegro ups.com...
> Is anyone using larger than stock tires? That will cause an odometer
> (and speedometer) error that will appear to affect your mpg.
>
Jeep "MOAB" Wheels. And GPS speed matches the speedodometer.
It really is getting ~8.5 - 10 mpg in the city, using the "crude" fill-up
gas pump/mileage method.
"wrangler" <ricktucker@charter.net> wrote in message
news:1115056350.769743.16110@g14g2000cwa.googlegro ups.com...
> Is anyone using larger than stock tires? That will cause an odometer
> (and speedometer) error that will appear to affect your mpg.
>
#12
Guest
Posts: n/a
Re: 2005 Rubicon Gas Mileage
It has the standard LT 245/75R-16E Goodyear 31" MT/R's mounted on the 16 x 8
Jeep "MOAB" Wheels. And GPS speed matches the speedodometer.
It really is getting ~8.5 - 10 mpg in the city, using the "crude" fill-up
gas pump/mileage method.
"wrangler" <ricktucker@charter.net> wrote in message
news:1115056350.769743.16110@g14g2000cwa.googlegro ups.com...
> Is anyone using larger than stock tires? That will cause an odometer
> (and speedometer) error that will appear to affect your mpg.
>
Jeep "MOAB" Wheels. And GPS speed matches the speedodometer.
It really is getting ~8.5 - 10 mpg in the city, using the "crude" fill-up
gas pump/mileage method.
"wrangler" <ricktucker@charter.net> wrote in message
news:1115056350.769743.16110@g14g2000cwa.googlegro ups.com...
> Is anyone using larger than stock tires? That will cause an odometer
> (and speedometer) error that will appear to affect your mpg.
>
#13
Guest
Posts: n/a
Re: 2005 Rubicon Gas Mileage
It has the standard LT 245/75R-16E Goodyear 31" MT/R's mounted on the 16 x 8
Jeep "MOAB" Wheels. And GPS speed matches the speedodometer.
It really is getting ~8.5 - 10 mpg in the city, using the "crude" fill-up
gas pump/mileage method.
"wrangler" <ricktucker@charter.net> wrote in message
news:1115056350.769743.16110@g14g2000cwa.googlegro ups.com...
> Is anyone using larger than stock tires? That will cause an odometer
> (and speedometer) error that will appear to affect your mpg.
>
Jeep "MOAB" Wheels. And GPS speed matches the speedodometer.
It really is getting ~8.5 - 10 mpg in the city, using the "crude" fill-up
gas pump/mileage method.
"wrangler" <ricktucker@charter.net> wrote in message
news:1115056350.769743.16110@g14g2000cwa.googlegro ups.com...
> Is anyone using larger than stock tires? That will cause an odometer
> (and speedometer) error that will appear to affect your mpg.
>
#14
Guest
Posts: n/a
Re: 2005 Rubicon Gas Mileage
I have a 2003 Wrangler Rubicon with the 5 spd, 33x12.50 tires, and ~10,000
miles on it. I drove it to Moab from Colorado Springs in March and I checked
the mileage on two tanks of gas. They were both a combination of two lane
highways, and Interstate 70 driving. The first tank I checked I got 17.6
mpg, and 17.8 on the second. I was holding it to 65 mph on the interstate.
I don't have a problem with the gas mileage as much as the lack of power. My
1991 Wrangler with 4.0L/5sp had a lot more power than my Rubicon! I wonder if
anyone has tried a non Rubicon ecm in a Rubicon? And would it be as easy as
unplugging the stock one and plugging in a non Rubicon one or do they interface
differently?
Jeff Hendron 2003 Jeep Wrangler Rubicon
MatrixOne Support Skyjacker 4" lift, JKS Disconnects
Agilent Technologies Fabtech Front Bumper, Rock Krusher Rear Bumper
Co Springs, Colorado Rock Krusher Rock Rails, Custom Swingout Tire Carrier
(719) 531-4319 33x12.50 Goodyear MTR's, Mickey Thompson Classic Lock Wheels
jeff_hendron@agilent.com Bush Whacker Fender Flares, Warn XD9000i Winch
Yamaha WR250ZF
Campbell C Freeman <campbellcfreeman@earthlink.net> wrote:
: Hello,
: I have a 2005 Rubicon, which I purchased about 2.5 months ago and it
: currently has 1,800 miles. I noticed shortly after driving it for a few
: days, that the gas gauge seemed to move to the left rather quickly. I also
: seemed to be putting gas in it much more often that my 2001 TJ, which I used
: as a trade. I did the "fill-er-up, same place, same pump, same delivery
: rate, & cut-off at the pump routine" for a week or two and was amazed to see
: an average of 10 mpg. The Rubicon (with California Emissions), has an EPA
: Rating of 15/19, whereas my 2001 TJ had a rating of 16/19. I averaged about
: 16 mpg with my 2001. Most of my driving is city.
: I did a VIN recall inquiry search on the www.Jeep.com site and found there
: was an outstanding Emissions Recall - Reprogram PCM: Notification Code D46,
: for this vehicle. The incorrect version of software was initially &
: originally programmed into the Powertrain Control Module (PCM), which "could
: cause the On-Board Diagnostic (OBD) fuel system monitor to malfunction." I
: called my dealer that day and scheduled an appointment to have the computer
: reprogrammed. Interestingly enough, that same day I received the exact same
: recall notice from DaimlerChrysler in the US Mail.
: I took the Rubicon in the next day...reprogramming took about an hour, and
: off I went. I took a trip out-of-town over the weekend, did some highway
: driving, and averaged about 17 mpg on 2 tanks of fuel. Three days later I
: was driving along in town when the Engine Light came on, began flashing, and
: the motor was running on 5/6 cylinders; skipping horribly. I pulled in to
: where I was going and called D/C 24 Hour Roadside Assistance. A tow truck
: was there in under 20 minutes, and off 'she' went to the dealer. Next day
: I was there when they opened, and stayed to find out what was the matter.
: The technician told me the computer code said "running lean." He found gas
: all over the # 6 spark plug and it was fouled. He replaced it but it still
: ran rough. Next he replaced the injector for that cylinder and that took
: care of the problem. Off I go, and 'she' is running just fine, but I am
: still getting 9-10 mpg in the city. This is the 4.0 L I6 w/ a 6 speed
: manual (the 'new' German transmission), and a 4.11 gear ratio. It is a
: "stock" Rubicon with everything but the hardtop. To me it runs fine with
: the exception of this gross gas mileage. Something has to be wrong.
: Even though I do 95% of my driving in the city, I seldom get above 2 grand
: in either 4th or 5th gear. I am not a "lead-foot." In fact, I "baby the
: thing" since it is so new. You are in 4th gear at 40 mph with this
: transmission and rear end. So I usually don't go over 40 in the city, only
: occasionally getting to 5th on some longer stretches and of course, 6th on
: the highway.
: What could be causing such terrible gas mileage? I understand that new
: motors use a little more fuel during break-in, but this is half of the
: rating (which I realize is not real-world). I am not running the AC at this
: point in the year yet either.
: Any explanations, suggestions, and/or "fixes" would be greatly appreciated.
: I will also call the dealership and report the extremely poor mileage.
: Thanks very much,
: Campbell Freeman
: South Carolina
miles on it. I drove it to Moab from Colorado Springs in March and I checked
the mileage on two tanks of gas. They were both a combination of two lane
highways, and Interstate 70 driving. The first tank I checked I got 17.6
mpg, and 17.8 on the second. I was holding it to 65 mph on the interstate.
I don't have a problem with the gas mileage as much as the lack of power. My
1991 Wrangler with 4.0L/5sp had a lot more power than my Rubicon! I wonder if
anyone has tried a non Rubicon ecm in a Rubicon? And would it be as easy as
unplugging the stock one and plugging in a non Rubicon one or do they interface
differently?
Jeff Hendron 2003 Jeep Wrangler Rubicon
MatrixOne Support Skyjacker 4" lift, JKS Disconnects
Agilent Technologies Fabtech Front Bumper, Rock Krusher Rear Bumper
Co Springs, Colorado Rock Krusher Rock Rails, Custom Swingout Tire Carrier
(719) 531-4319 33x12.50 Goodyear MTR's, Mickey Thompson Classic Lock Wheels
jeff_hendron@agilent.com Bush Whacker Fender Flares, Warn XD9000i Winch
Yamaha WR250ZF
Campbell C Freeman <campbellcfreeman@earthlink.net> wrote:
: Hello,
: I have a 2005 Rubicon, which I purchased about 2.5 months ago and it
: currently has 1,800 miles. I noticed shortly after driving it for a few
: days, that the gas gauge seemed to move to the left rather quickly. I also
: seemed to be putting gas in it much more often that my 2001 TJ, which I used
: as a trade. I did the "fill-er-up, same place, same pump, same delivery
: rate, & cut-off at the pump routine" for a week or two and was amazed to see
: an average of 10 mpg. The Rubicon (with California Emissions), has an EPA
: Rating of 15/19, whereas my 2001 TJ had a rating of 16/19. I averaged about
: 16 mpg with my 2001. Most of my driving is city.
: I did a VIN recall inquiry search on the www.Jeep.com site and found there
: was an outstanding Emissions Recall - Reprogram PCM: Notification Code D46,
: for this vehicle. The incorrect version of software was initially &
: originally programmed into the Powertrain Control Module (PCM), which "could
: cause the On-Board Diagnostic (OBD) fuel system monitor to malfunction." I
: called my dealer that day and scheduled an appointment to have the computer
: reprogrammed. Interestingly enough, that same day I received the exact same
: recall notice from DaimlerChrysler in the US Mail.
: I took the Rubicon in the next day...reprogramming took about an hour, and
: off I went. I took a trip out-of-town over the weekend, did some highway
: driving, and averaged about 17 mpg on 2 tanks of fuel. Three days later I
: was driving along in town when the Engine Light came on, began flashing, and
: the motor was running on 5/6 cylinders; skipping horribly. I pulled in to
: where I was going and called D/C 24 Hour Roadside Assistance. A tow truck
: was there in under 20 minutes, and off 'she' went to the dealer. Next day
: I was there when they opened, and stayed to find out what was the matter.
: The technician told me the computer code said "running lean." He found gas
: all over the # 6 spark plug and it was fouled. He replaced it but it still
: ran rough. Next he replaced the injector for that cylinder and that took
: care of the problem. Off I go, and 'she' is running just fine, but I am
: still getting 9-10 mpg in the city. This is the 4.0 L I6 w/ a 6 speed
: manual (the 'new' German transmission), and a 4.11 gear ratio. It is a
: "stock" Rubicon with everything but the hardtop. To me it runs fine with
: the exception of this gross gas mileage. Something has to be wrong.
: Even though I do 95% of my driving in the city, I seldom get above 2 grand
: in either 4th or 5th gear. I am not a "lead-foot." In fact, I "baby the
: thing" since it is so new. You are in 4th gear at 40 mph with this
: transmission and rear end. So I usually don't go over 40 in the city, only
: occasionally getting to 5th on some longer stretches and of course, 6th on
: the highway.
: What could be causing such terrible gas mileage? I understand that new
: motors use a little more fuel during break-in, but this is half of the
: rating (which I realize is not real-world). I am not running the AC at this
: point in the year yet either.
: Any explanations, suggestions, and/or "fixes" would be greatly appreciated.
: I will also call the dealership and report the extremely poor mileage.
: Thanks very much,
: Campbell Freeman
: South Carolina
#15
Guest
Posts: n/a
Re: 2005 Rubicon Gas Mileage
I have a 2003 Wrangler Rubicon with the 5 spd, 33x12.50 tires, and ~10,000
miles on it. I drove it to Moab from Colorado Springs in March and I checked
the mileage on two tanks of gas. They were both a combination of two lane
highways, and Interstate 70 driving. The first tank I checked I got 17.6
mpg, and 17.8 on the second. I was holding it to 65 mph on the interstate.
I don't have a problem with the gas mileage as much as the lack of power. My
1991 Wrangler with 4.0L/5sp had a lot more power than my Rubicon! I wonder if
anyone has tried a non Rubicon ecm in a Rubicon? And would it be as easy as
unplugging the stock one and plugging in a non Rubicon one or do they interface
differently?
Jeff Hendron 2003 Jeep Wrangler Rubicon
MatrixOne Support Skyjacker 4" lift, JKS Disconnects
Agilent Technologies Fabtech Front Bumper, Rock Krusher Rear Bumper
Co Springs, Colorado Rock Krusher Rock Rails, Custom Swingout Tire Carrier
(719) 531-4319 33x12.50 Goodyear MTR's, Mickey Thompson Classic Lock Wheels
jeff_hendron@agilent.com Bush Whacker Fender Flares, Warn XD9000i Winch
Yamaha WR250ZF
Campbell C Freeman <campbellcfreeman@earthlink.net> wrote:
: Hello,
: I have a 2005 Rubicon, which I purchased about 2.5 months ago and it
: currently has 1,800 miles. I noticed shortly after driving it for a few
: days, that the gas gauge seemed to move to the left rather quickly. I also
: seemed to be putting gas in it much more often that my 2001 TJ, which I used
: as a trade. I did the "fill-er-up, same place, same pump, same delivery
: rate, & cut-off at the pump routine" for a week or two and was amazed to see
: an average of 10 mpg. The Rubicon (with California Emissions), has an EPA
: Rating of 15/19, whereas my 2001 TJ had a rating of 16/19. I averaged about
: 16 mpg with my 2001. Most of my driving is city.
: I did a VIN recall inquiry search on the www.Jeep.com site and found there
: was an outstanding Emissions Recall - Reprogram PCM: Notification Code D46,
: for this vehicle. The incorrect version of software was initially &
: originally programmed into the Powertrain Control Module (PCM), which "could
: cause the On-Board Diagnostic (OBD) fuel system monitor to malfunction." I
: called my dealer that day and scheduled an appointment to have the computer
: reprogrammed. Interestingly enough, that same day I received the exact same
: recall notice from DaimlerChrysler in the US Mail.
: I took the Rubicon in the next day...reprogramming took about an hour, and
: off I went. I took a trip out-of-town over the weekend, did some highway
: driving, and averaged about 17 mpg on 2 tanks of fuel. Three days later I
: was driving along in town when the Engine Light came on, began flashing, and
: the motor was running on 5/6 cylinders; skipping horribly. I pulled in to
: where I was going and called D/C 24 Hour Roadside Assistance. A tow truck
: was there in under 20 minutes, and off 'she' went to the dealer. Next day
: I was there when they opened, and stayed to find out what was the matter.
: The technician told me the computer code said "running lean." He found gas
: all over the # 6 spark plug and it was fouled. He replaced it but it still
: ran rough. Next he replaced the injector for that cylinder and that took
: care of the problem. Off I go, and 'she' is running just fine, but I am
: still getting 9-10 mpg in the city. This is the 4.0 L I6 w/ a 6 speed
: manual (the 'new' German transmission), and a 4.11 gear ratio. It is a
: "stock" Rubicon with everything but the hardtop. To me it runs fine with
: the exception of this gross gas mileage. Something has to be wrong.
: Even though I do 95% of my driving in the city, I seldom get above 2 grand
: in either 4th or 5th gear. I am not a "lead-foot." In fact, I "baby the
: thing" since it is so new. You are in 4th gear at 40 mph with this
: transmission and rear end. So I usually don't go over 40 in the city, only
: occasionally getting to 5th on some longer stretches and of course, 6th on
: the highway.
: What could be causing such terrible gas mileage? I understand that new
: motors use a little more fuel during break-in, but this is half of the
: rating (which I realize is not real-world). I am not running the AC at this
: point in the year yet either.
: Any explanations, suggestions, and/or "fixes" would be greatly appreciated.
: I will also call the dealership and report the extremely poor mileage.
: Thanks very much,
: Campbell Freeman
: South Carolina
miles on it. I drove it to Moab from Colorado Springs in March and I checked
the mileage on two tanks of gas. They were both a combination of two lane
highways, and Interstate 70 driving. The first tank I checked I got 17.6
mpg, and 17.8 on the second. I was holding it to 65 mph on the interstate.
I don't have a problem with the gas mileage as much as the lack of power. My
1991 Wrangler with 4.0L/5sp had a lot more power than my Rubicon! I wonder if
anyone has tried a non Rubicon ecm in a Rubicon? And would it be as easy as
unplugging the stock one and plugging in a non Rubicon one or do they interface
differently?
Jeff Hendron 2003 Jeep Wrangler Rubicon
MatrixOne Support Skyjacker 4" lift, JKS Disconnects
Agilent Technologies Fabtech Front Bumper, Rock Krusher Rear Bumper
Co Springs, Colorado Rock Krusher Rock Rails, Custom Swingout Tire Carrier
(719) 531-4319 33x12.50 Goodyear MTR's, Mickey Thompson Classic Lock Wheels
jeff_hendron@agilent.com Bush Whacker Fender Flares, Warn XD9000i Winch
Yamaha WR250ZF
Campbell C Freeman <campbellcfreeman@earthlink.net> wrote:
: Hello,
: I have a 2005 Rubicon, which I purchased about 2.5 months ago and it
: currently has 1,800 miles. I noticed shortly after driving it for a few
: days, that the gas gauge seemed to move to the left rather quickly. I also
: seemed to be putting gas in it much more often that my 2001 TJ, which I used
: as a trade. I did the "fill-er-up, same place, same pump, same delivery
: rate, & cut-off at the pump routine" for a week or two and was amazed to see
: an average of 10 mpg. The Rubicon (with California Emissions), has an EPA
: Rating of 15/19, whereas my 2001 TJ had a rating of 16/19. I averaged about
: 16 mpg with my 2001. Most of my driving is city.
: I did a VIN recall inquiry search on the www.Jeep.com site and found there
: was an outstanding Emissions Recall - Reprogram PCM: Notification Code D46,
: for this vehicle. The incorrect version of software was initially &
: originally programmed into the Powertrain Control Module (PCM), which "could
: cause the On-Board Diagnostic (OBD) fuel system monitor to malfunction." I
: called my dealer that day and scheduled an appointment to have the computer
: reprogrammed. Interestingly enough, that same day I received the exact same
: recall notice from DaimlerChrysler in the US Mail.
: I took the Rubicon in the next day...reprogramming took about an hour, and
: off I went. I took a trip out-of-town over the weekend, did some highway
: driving, and averaged about 17 mpg on 2 tanks of fuel. Three days later I
: was driving along in town when the Engine Light came on, began flashing, and
: the motor was running on 5/6 cylinders; skipping horribly. I pulled in to
: where I was going and called D/C 24 Hour Roadside Assistance. A tow truck
: was there in under 20 minutes, and off 'she' went to the dealer. Next day
: I was there when they opened, and stayed to find out what was the matter.
: The technician told me the computer code said "running lean." He found gas
: all over the # 6 spark plug and it was fouled. He replaced it but it still
: ran rough. Next he replaced the injector for that cylinder and that took
: care of the problem. Off I go, and 'she' is running just fine, but I am
: still getting 9-10 mpg in the city. This is the 4.0 L I6 w/ a 6 speed
: manual (the 'new' German transmission), and a 4.11 gear ratio. It is a
: "stock" Rubicon with everything but the hardtop. To me it runs fine with
: the exception of this gross gas mileage. Something has to be wrong.
: Even though I do 95% of my driving in the city, I seldom get above 2 grand
: in either 4th or 5th gear. I am not a "lead-foot." In fact, I "baby the
: thing" since it is so new. You are in 4th gear at 40 mph with this
: transmission and rear end. So I usually don't go over 40 in the city, only
: occasionally getting to 5th on some longer stretches and of course, 6th on
: the highway.
: What could be causing such terrible gas mileage? I understand that new
: motors use a little more fuel during break-in, but this is half of the
: rating (which I realize is not real-world). I am not running the AC at this
: point in the year yet either.
: Any explanations, suggestions, and/or "fixes" would be greatly appreciated.
: I will also call the dealership and report the extremely poor mileage.
: Thanks very much,
: Campbell Freeman
: South Carolina
#16
Guest
Posts: n/a
Re: 2005 Rubicon Gas Mileage
I have a 2003 Wrangler Rubicon with the 5 spd, 33x12.50 tires, and ~10,000
miles on it. I drove it to Moab from Colorado Springs in March and I checked
the mileage on two tanks of gas. They were both a combination of two lane
highways, and Interstate 70 driving. The first tank I checked I got 17.6
mpg, and 17.8 on the second. I was holding it to 65 mph on the interstate.
I don't have a problem with the gas mileage as much as the lack of power. My
1991 Wrangler with 4.0L/5sp had a lot more power than my Rubicon! I wonder if
anyone has tried a non Rubicon ecm in a Rubicon? And would it be as easy as
unplugging the stock one and plugging in a non Rubicon one or do they interface
differently?
Jeff Hendron 2003 Jeep Wrangler Rubicon
MatrixOne Support Skyjacker 4" lift, JKS Disconnects
Agilent Technologies Fabtech Front Bumper, Rock Krusher Rear Bumper
Co Springs, Colorado Rock Krusher Rock Rails, Custom Swingout Tire Carrier
(719) 531-4319 33x12.50 Goodyear MTR's, Mickey Thompson Classic Lock Wheels
jeff_hendron@agilent.com Bush Whacker Fender Flares, Warn XD9000i Winch
Yamaha WR250ZF
Campbell C Freeman <campbellcfreeman@earthlink.net> wrote:
: Hello,
: I have a 2005 Rubicon, which I purchased about 2.5 months ago and it
: currently has 1,800 miles. I noticed shortly after driving it for a few
: days, that the gas gauge seemed to move to the left rather quickly. I also
: seemed to be putting gas in it much more often that my 2001 TJ, which I used
: as a trade. I did the "fill-er-up, same place, same pump, same delivery
: rate, & cut-off at the pump routine" for a week or two and was amazed to see
: an average of 10 mpg. The Rubicon (with California Emissions), has an EPA
: Rating of 15/19, whereas my 2001 TJ had a rating of 16/19. I averaged about
: 16 mpg with my 2001. Most of my driving is city.
: I did a VIN recall inquiry search on the www.Jeep.com site and found there
: was an outstanding Emissions Recall - Reprogram PCM: Notification Code D46,
: for this vehicle. The incorrect version of software was initially &
: originally programmed into the Powertrain Control Module (PCM), which "could
: cause the On-Board Diagnostic (OBD) fuel system monitor to malfunction." I
: called my dealer that day and scheduled an appointment to have the computer
: reprogrammed. Interestingly enough, that same day I received the exact same
: recall notice from DaimlerChrysler in the US Mail.
: I took the Rubicon in the next day...reprogramming took about an hour, and
: off I went. I took a trip out-of-town over the weekend, did some highway
: driving, and averaged about 17 mpg on 2 tanks of fuel. Three days later I
: was driving along in town when the Engine Light came on, began flashing, and
: the motor was running on 5/6 cylinders; skipping horribly. I pulled in to
: where I was going and called D/C 24 Hour Roadside Assistance. A tow truck
: was there in under 20 minutes, and off 'she' went to the dealer. Next day
: I was there when they opened, and stayed to find out what was the matter.
: The technician told me the computer code said "running lean." He found gas
: all over the # 6 spark plug and it was fouled. He replaced it but it still
: ran rough. Next he replaced the injector for that cylinder and that took
: care of the problem. Off I go, and 'she' is running just fine, but I am
: still getting 9-10 mpg in the city. This is the 4.0 L I6 w/ a 6 speed
: manual (the 'new' German transmission), and a 4.11 gear ratio. It is a
: "stock" Rubicon with everything but the hardtop. To me it runs fine with
: the exception of this gross gas mileage. Something has to be wrong.
: Even though I do 95% of my driving in the city, I seldom get above 2 grand
: in either 4th or 5th gear. I am not a "lead-foot." In fact, I "baby the
: thing" since it is so new. You are in 4th gear at 40 mph with this
: transmission and rear end. So I usually don't go over 40 in the city, only
: occasionally getting to 5th on some longer stretches and of course, 6th on
: the highway.
: What could be causing such terrible gas mileage? I understand that new
: motors use a little more fuel during break-in, but this is half of the
: rating (which I realize is not real-world). I am not running the AC at this
: point in the year yet either.
: Any explanations, suggestions, and/or "fixes" would be greatly appreciated.
: I will also call the dealership and report the extremely poor mileage.
: Thanks very much,
: Campbell Freeman
: South Carolina
miles on it. I drove it to Moab from Colorado Springs in March and I checked
the mileage on two tanks of gas. They were both a combination of two lane
highways, and Interstate 70 driving. The first tank I checked I got 17.6
mpg, and 17.8 on the second. I was holding it to 65 mph on the interstate.
I don't have a problem with the gas mileage as much as the lack of power. My
1991 Wrangler with 4.0L/5sp had a lot more power than my Rubicon! I wonder if
anyone has tried a non Rubicon ecm in a Rubicon? And would it be as easy as
unplugging the stock one and plugging in a non Rubicon one or do they interface
differently?
Jeff Hendron 2003 Jeep Wrangler Rubicon
MatrixOne Support Skyjacker 4" lift, JKS Disconnects
Agilent Technologies Fabtech Front Bumper, Rock Krusher Rear Bumper
Co Springs, Colorado Rock Krusher Rock Rails, Custom Swingout Tire Carrier
(719) 531-4319 33x12.50 Goodyear MTR's, Mickey Thompson Classic Lock Wheels
jeff_hendron@agilent.com Bush Whacker Fender Flares, Warn XD9000i Winch
Yamaha WR250ZF
Campbell C Freeman <campbellcfreeman@earthlink.net> wrote:
: Hello,
: I have a 2005 Rubicon, which I purchased about 2.5 months ago and it
: currently has 1,800 miles. I noticed shortly after driving it for a few
: days, that the gas gauge seemed to move to the left rather quickly. I also
: seemed to be putting gas in it much more often that my 2001 TJ, which I used
: as a trade. I did the "fill-er-up, same place, same pump, same delivery
: rate, & cut-off at the pump routine" for a week or two and was amazed to see
: an average of 10 mpg. The Rubicon (with California Emissions), has an EPA
: Rating of 15/19, whereas my 2001 TJ had a rating of 16/19. I averaged about
: 16 mpg with my 2001. Most of my driving is city.
: I did a VIN recall inquiry search on the www.Jeep.com site and found there
: was an outstanding Emissions Recall - Reprogram PCM: Notification Code D46,
: for this vehicle. The incorrect version of software was initially &
: originally programmed into the Powertrain Control Module (PCM), which "could
: cause the On-Board Diagnostic (OBD) fuel system monitor to malfunction." I
: called my dealer that day and scheduled an appointment to have the computer
: reprogrammed. Interestingly enough, that same day I received the exact same
: recall notice from DaimlerChrysler in the US Mail.
: I took the Rubicon in the next day...reprogramming took about an hour, and
: off I went. I took a trip out-of-town over the weekend, did some highway
: driving, and averaged about 17 mpg on 2 tanks of fuel. Three days later I
: was driving along in town when the Engine Light came on, began flashing, and
: the motor was running on 5/6 cylinders; skipping horribly. I pulled in to
: where I was going and called D/C 24 Hour Roadside Assistance. A tow truck
: was there in under 20 minutes, and off 'she' went to the dealer. Next day
: I was there when they opened, and stayed to find out what was the matter.
: The technician told me the computer code said "running lean." He found gas
: all over the # 6 spark plug and it was fouled. He replaced it but it still
: ran rough. Next he replaced the injector for that cylinder and that took
: care of the problem. Off I go, and 'she' is running just fine, but I am
: still getting 9-10 mpg in the city. This is the 4.0 L I6 w/ a 6 speed
: manual (the 'new' German transmission), and a 4.11 gear ratio. It is a
: "stock" Rubicon with everything but the hardtop. To me it runs fine with
: the exception of this gross gas mileage. Something has to be wrong.
: Even though I do 95% of my driving in the city, I seldom get above 2 grand
: in either 4th or 5th gear. I am not a "lead-foot." In fact, I "baby the
: thing" since it is so new. You are in 4th gear at 40 mph with this
: transmission and rear end. So I usually don't go over 40 in the city, only
: occasionally getting to 5th on some longer stretches and of course, 6th on
: the highway.
: What could be causing such terrible gas mileage? I understand that new
: motors use a little more fuel during break-in, but this is half of the
: rating (which I realize is not real-world). I am not running the AC at this
: point in the year yet either.
: Any explanations, suggestions, and/or "fixes" would be greatly appreciated.
: I will also call the dealership and report the extremely poor mileage.
: Thanks very much,
: Campbell Freeman
: South Carolina
#17
Guest
Posts: n/a
Re: 2005 Rubicon Gas Mileage
I have a 2003 Wrangler Rubicon with the 5 spd, 33x12.50 tires, and ~10,000
miles on it. I drove it to Moab from Colorado Springs in March and I checked
the mileage on two tanks of gas. They were both a combination of two lane
highways, and Interstate 70 driving. The first tank I checked I got 17.6
mpg, and 17.8 on the second. I was holding it to 65 mph on the interstate.
I don't have a problem with the gas mileage as much as the lack of power. My
1991 Wrangler with 4.0L/5sp had a lot more power than my Rubicon! I wonder if
anyone has tried a non Rubicon ecm in a Rubicon? And would it be as easy as
unplugging the stock one and plugging in a non Rubicon one or do they interface
differently?
Jeff Hendron 2003 Jeep Wrangler Rubicon
MatrixOne Support Skyjacker 4" lift, JKS Disconnects
Agilent Technologies Fabtech Front Bumper, Rock Krusher Rear Bumper
Co Springs, Colorado Rock Krusher Rock Rails, Custom Swingout Tire Carrier
(719) 531-4319 33x12.50 Goodyear MTR's, Mickey Thompson Classic Lock Wheels
jeff_hendron@agilent.com Bush Whacker Fender Flares, Warn XD9000i Winch
Yamaha WR250ZF
Campbell C Freeman <campbellcfreeman@earthlink.net> wrote:
: Hello,
: I have a 2005 Rubicon, which I purchased about 2.5 months ago and it
: currently has 1,800 miles. I noticed shortly after driving it for a few
: days, that the gas gauge seemed to move to the left rather quickly. I also
: seemed to be putting gas in it much more often that my 2001 TJ, which I used
: as a trade. I did the "fill-er-up, same place, same pump, same delivery
: rate, & cut-off at the pump routine" for a week or two and was amazed to see
: an average of 10 mpg. The Rubicon (with California Emissions), has an EPA
: Rating of 15/19, whereas my 2001 TJ had a rating of 16/19. I averaged about
: 16 mpg with my 2001. Most of my driving is city.
: I did a VIN recall inquiry search on the www.Jeep.com site and found there
: was an outstanding Emissions Recall - Reprogram PCM: Notification Code D46,
: for this vehicle. The incorrect version of software was initially &
: originally programmed into the Powertrain Control Module (PCM), which "could
: cause the On-Board Diagnostic (OBD) fuel system monitor to malfunction." I
: called my dealer that day and scheduled an appointment to have the computer
: reprogrammed. Interestingly enough, that same day I received the exact same
: recall notice from DaimlerChrysler in the US Mail.
: I took the Rubicon in the next day...reprogramming took about an hour, and
: off I went. I took a trip out-of-town over the weekend, did some highway
: driving, and averaged about 17 mpg on 2 tanks of fuel. Three days later I
: was driving along in town when the Engine Light came on, began flashing, and
: the motor was running on 5/6 cylinders; skipping horribly. I pulled in to
: where I was going and called D/C 24 Hour Roadside Assistance. A tow truck
: was there in under 20 minutes, and off 'she' went to the dealer. Next day
: I was there when they opened, and stayed to find out what was the matter.
: The technician told me the computer code said "running lean." He found gas
: all over the # 6 spark plug and it was fouled. He replaced it but it still
: ran rough. Next he replaced the injector for that cylinder and that took
: care of the problem. Off I go, and 'she' is running just fine, but I am
: still getting 9-10 mpg in the city. This is the 4.0 L I6 w/ a 6 speed
: manual (the 'new' German transmission), and a 4.11 gear ratio. It is a
: "stock" Rubicon with everything but the hardtop. To me it runs fine with
: the exception of this gross gas mileage. Something has to be wrong.
: Even though I do 95% of my driving in the city, I seldom get above 2 grand
: in either 4th or 5th gear. I am not a "lead-foot." In fact, I "baby the
: thing" since it is so new. You are in 4th gear at 40 mph with this
: transmission and rear end. So I usually don't go over 40 in the city, only
: occasionally getting to 5th on some longer stretches and of course, 6th on
: the highway.
: What could be causing such terrible gas mileage? I understand that new
: motors use a little more fuel during break-in, but this is half of the
: rating (which I realize is not real-world). I am not running the AC at this
: point in the year yet either.
: Any explanations, suggestions, and/or "fixes" would be greatly appreciated.
: I will also call the dealership and report the extremely poor mileage.
: Thanks very much,
: Campbell Freeman
: South Carolina
miles on it. I drove it to Moab from Colorado Springs in March and I checked
the mileage on two tanks of gas. They were both a combination of two lane
highways, and Interstate 70 driving. The first tank I checked I got 17.6
mpg, and 17.8 on the second. I was holding it to 65 mph on the interstate.
I don't have a problem with the gas mileage as much as the lack of power. My
1991 Wrangler with 4.0L/5sp had a lot more power than my Rubicon! I wonder if
anyone has tried a non Rubicon ecm in a Rubicon? And would it be as easy as
unplugging the stock one and plugging in a non Rubicon one or do they interface
differently?
Jeff Hendron 2003 Jeep Wrangler Rubicon
MatrixOne Support Skyjacker 4" lift, JKS Disconnects
Agilent Technologies Fabtech Front Bumper, Rock Krusher Rear Bumper
Co Springs, Colorado Rock Krusher Rock Rails, Custom Swingout Tire Carrier
(719) 531-4319 33x12.50 Goodyear MTR's, Mickey Thompson Classic Lock Wheels
jeff_hendron@agilent.com Bush Whacker Fender Flares, Warn XD9000i Winch
Yamaha WR250ZF
Campbell C Freeman <campbellcfreeman@earthlink.net> wrote:
: Hello,
: I have a 2005 Rubicon, which I purchased about 2.5 months ago and it
: currently has 1,800 miles. I noticed shortly after driving it for a few
: days, that the gas gauge seemed to move to the left rather quickly. I also
: seemed to be putting gas in it much more often that my 2001 TJ, which I used
: as a trade. I did the "fill-er-up, same place, same pump, same delivery
: rate, & cut-off at the pump routine" for a week or two and was amazed to see
: an average of 10 mpg. The Rubicon (with California Emissions), has an EPA
: Rating of 15/19, whereas my 2001 TJ had a rating of 16/19. I averaged about
: 16 mpg with my 2001. Most of my driving is city.
: I did a VIN recall inquiry search on the www.Jeep.com site and found there
: was an outstanding Emissions Recall - Reprogram PCM: Notification Code D46,
: for this vehicle. The incorrect version of software was initially &
: originally programmed into the Powertrain Control Module (PCM), which "could
: cause the On-Board Diagnostic (OBD) fuel system monitor to malfunction." I
: called my dealer that day and scheduled an appointment to have the computer
: reprogrammed. Interestingly enough, that same day I received the exact same
: recall notice from DaimlerChrysler in the US Mail.
: I took the Rubicon in the next day...reprogramming took about an hour, and
: off I went. I took a trip out-of-town over the weekend, did some highway
: driving, and averaged about 17 mpg on 2 tanks of fuel. Three days later I
: was driving along in town when the Engine Light came on, began flashing, and
: the motor was running on 5/6 cylinders; skipping horribly. I pulled in to
: where I was going and called D/C 24 Hour Roadside Assistance. A tow truck
: was there in under 20 minutes, and off 'she' went to the dealer. Next day
: I was there when they opened, and stayed to find out what was the matter.
: The technician told me the computer code said "running lean." He found gas
: all over the # 6 spark plug and it was fouled. He replaced it but it still
: ran rough. Next he replaced the injector for that cylinder and that took
: care of the problem. Off I go, and 'she' is running just fine, but I am
: still getting 9-10 mpg in the city. This is the 4.0 L I6 w/ a 6 speed
: manual (the 'new' German transmission), and a 4.11 gear ratio. It is a
: "stock" Rubicon with everything but the hardtop. To me it runs fine with
: the exception of this gross gas mileage. Something has to be wrong.
: Even though I do 95% of my driving in the city, I seldom get above 2 grand
: in either 4th or 5th gear. I am not a "lead-foot." In fact, I "baby the
: thing" since it is so new. You are in 4th gear at 40 mph with this
: transmission and rear end. So I usually don't go over 40 in the city, only
: occasionally getting to 5th on some longer stretches and of course, 6th on
: the highway.
: What could be causing such terrible gas mileage? I understand that new
: motors use a little more fuel during break-in, but this is half of the
: rating (which I realize is not real-world). I am not running the AC at this
: point in the year yet either.
: Any explanations, suggestions, and/or "fixes" would be greatly appreciated.
: I will also call the dealership and report the extremely poor mileage.
: Thanks very much,
: Campbell Freeman
: South Carolina
#18
Guest
Posts: n/a
Re: 2005 Rubicon Gas Mileage
Your Rubicon has 33" tires and 4.10 gearing, not a great ratio for that
size tire. Regearing to 4.56 would restore the power caused by that
4.10/33" combination.
Jerry
Jeff Hendron wrote:
> I have a 2003 Wrangler Rubicon with the 5 spd, 33x12.50 tires, and ~10,000
> miles on it. I drove it to Moab from Colorado Springs in March and I checked
> the mileage on two tanks of gas. They were both a combination of two lane
> highways, and Interstate 70 driving. The first tank I checked I got 17.6
> mpg, and 17.8 on the second. I was holding it to 65 mph on the interstate.
>
> I don't have a problem with the gas mileage as much as the lack of power. My
> 1991 Wrangler with 4.0L/5sp had a lot more power than my Rubicon! I wonder if
> anyone has tried a non Rubicon ecm in a Rubicon? And would it be as easy as
> unplugging the stock one and plugging in a non Rubicon one or do they interface
> differently?
>
>
> Jeff Hendron 2003 Jeep Wrangler Rubicon
> MatrixOne Support Skyjacker 4" lift, JKS Disconnects
> Agilent Technologies Fabtech Front Bumper, Rock Krusher Rear Bumper
> Co Springs, Colorado Rock Krusher Rock Rails, Custom Swingout Tire Carrier
> (719) 531-4319 33x12.50 Goodyear MTR's, Mickey Thompson Classic Lock Wheels
> jeff_hendron@agilent.com Bush Whacker Fender Flares, Warn XD9000i Winch
>
> Yamaha WR250ZF
>
> Campbell C Freeman <campbellcfreeman@earthlink.net> wrote:
> : Hello,
>
> : I have a 2005 Rubicon, which I purchased about 2.5 months ago and it
> : currently has 1,800 miles. I noticed shortly after driving it for a few
> : days, that the gas gauge seemed to move to the left rather quickly. I also
> : seemed to be putting gas in it much more often that my 2001 TJ, which I used
> : as a trade. I did the "fill-er-up, same place, same pump, same delivery
> : rate, & cut-off at the pump routine" for a week or two and was amazed to see
> : an average of 10 mpg. The Rubicon (with California Emissions), has an EPA
> : Rating of 15/19, whereas my 2001 TJ had a rating of 16/19. I averaged about
> : 16 mpg with my 2001. Most of my driving is city.
>
> : I did a VIN recall inquiry search on the www.Jeep.com site and found there
> : was an outstanding Emissions Recall - Reprogram PCM: Notification Code D46,
> : for this vehicle. The incorrect version of software was initially &
> : originally programmed into the Powertrain Control Module (PCM), which "could
> : cause the On-Board Diagnostic (OBD) fuel system monitor to malfunction." I
> : called my dealer that day and scheduled an appointment to have the computer
> : reprogrammed. Interestingly enough, that same day I received the exact same
> : recall notice from DaimlerChrysler in the US Mail.
>
> : I took the Rubicon in the next day...reprogramming took about an hour, and
> : off I went. I took a trip out-of-town over the weekend, did some highway
> : driving, and averaged about 17 mpg on 2 tanks of fuel. Three days later I
> : was driving along in town when the Engine Light came on, began flashing, and
> : the motor was running on 5/6 cylinders; skipping horribly. I pulled in to
> : where I was going and called D/C 24 Hour Roadside Assistance. A tow truck
> : was there in under 20 minutes, and off 'she' went to the dealer. Next day
> : I was there when they opened, and stayed to find out what was the matter.
> : The technician told me the computer code said "running lean." He found gas
> : all over the # 6 spark plug and it was fouled. He replaced it but it still
> : ran rough. Next he replaced the injector for that cylinder and that took
> : care of the problem. Off I go, and 'she' is running just fine, but I am
> : still getting 9-10 mpg in the city. This is the 4.0 L I6 w/ a 6 speed
> : manual (the 'new' German transmission), and a 4.11 gear ratio. It is a
> : "stock" Rubicon with everything but the hardtop. To me it runs fine with
> : the exception of this gross gas mileage. Something has to be wrong.
>
> : Even though I do 95% of my driving in the city, I seldom get above 2 grand
> : in either 4th or 5th gear. I am not a "lead-foot." In fact, I "baby the
> : thing" since it is so new. You are in 4th gear at 40 mph with this
> : transmission and rear end. So I usually don't go over 40 in the city, only
> : occasionally getting to 5th on some longer stretches and of course, 6th on
> : the highway.
>
> : What could be causing such terrible gas mileage? I understand that new
> : motors use a little more fuel during break-in, but this is half of the
> : rating (which I realize is not real-world). I am not running the AC at this
> : point in the year yet either.
>
> : Any explanations, suggestions, and/or "fixes" would be greatly appreciated.
> : I will also call the dealership and report the extremely poor mileage.
>
> : Thanks very much,
>
> : Campbell Freeman
> : South Carolina
>
>
--
Jerry Bransford
PP-ASEL N6TAY
See the Geezer Jeep at
http://members.***.net/jerrypb/
size tire. Regearing to 4.56 would restore the power caused by that
4.10/33" combination.
Jerry
Jeff Hendron wrote:
> I have a 2003 Wrangler Rubicon with the 5 spd, 33x12.50 tires, and ~10,000
> miles on it. I drove it to Moab from Colorado Springs in March and I checked
> the mileage on two tanks of gas. They were both a combination of two lane
> highways, and Interstate 70 driving. The first tank I checked I got 17.6
> mpg, and 17.8 on the second. I was holding it to 65 mph on the interstate.
>
> I don't have a problem with the gas mileage as much as the lack of power. My
> 1991 Wrangler with 4.0L/5sp had a lot more power than my Rubicon! I wonder if
> anyone has tried a non Rubicon ecm in a Rubicon? And would it be as easy as
> unplugging the stock one and plugging in a non Rubicon one or do they interface
> differently?
>
>
> Jeff Hendron 2003 Jeep Wrangler Rubicon
> MatrixOne Support Skyjacker 4" lift, JKS Disconnects
> Agilent Technologies Fabtech Front Bumper, Rock Krusher Rear Bumper
> Co Springs, Colorado Rock Krusher Rock Rails, Custom Swingout Tire Carrier
> (719) 531-4319 33x12.50 Goodyear MTR's, Mickey Thompson Classic Lock Wheels
> jeff_hendron@agilent.com Bush Whacker Fender Flares, Warn XD9000i Winch
>
> Yamaha WR250ZF
>
> Campbell C Freeman <campbellcfreeman@earthlink.net> wrote:
> : Hello,
>
> : I have a 2005 Rubicon, which I purchased about 2.5 months ago and it
> : currently has 1,800 miles. I noticed shortly after driving it for a few
> : days, that the gas gauge seemed to move to the left rather quickly. I also
> : seemed to be putting gas in it much more often that my 2001 TJ, which I used
> : as a trade. I did the "fill-er-up, same place, same pump, same delivery
> : rate, & cut-off at the pump routine" for a week or two and was amazed to see
> : an average of 10 mpg. The Rubicon (with California Emissions), has an EPA
> : Rating of 15/19, whereas my 2001 TJ had a rating of 16/19. I averaged about
> : 16 mpg with my 2001. Most of my driving is city.
>
> : I did a VIN recall inquiry search on the www.Jeep.com site and found there
> : was an outstanding Emissions Recall - Reprogram PCM: Notification Code D46,
> : for this vehicle. The incorrect version of software was initially &
> : originally programmed into the Powertrain Control Module (PCM), which "could
> : cause the On-Board Diagnostic (OBD) fuel system monitor to malfunction." I
> : called my dealer that day and scheduled an appointment to have the computer
> : reprogrammed. Interestingly enough, that same day I received the exact same
> : recall notice from DaimlerChrysler in the US Mail.
>
> : I took the Rubicon in the next day...reprogramming took about an hour, and
> : off I went. I took a trip out-of-town over the weekend, did some highway
> : driving, and averaged about 17 mpg on 2 tanks of fuel. Three days later I
> : was driving along in town when the Engine Light came on, began flashing, and
> : the motor was running on 5/6 cylinders; skipping horribly. I pulled in to
> : where I was going and called D/C 24 Hour Roadside Assistance. A tow truck
> : was there in under 20 minutes, and off 'she' went to the dealer. Next day
> : I was there when they opened, and stayed to find out what was the matter.
> : The technician told me the computer code said "running lean." He found gas
> : all over the # 6 spark plug and it was fouled. He replaced it but it still
> : ran rough. Next he replaced the injector for that cylinder and that took
> : care of the problem. Off I go, and 'she' is running just fine, but I am
> : still getting 9-10 mpg in the city. This is the 4.0 L I6 w/ a 6 speed
> : manual (the 'new' German transmission), and a 4.11 gear ratio. It is a
> : "stock" Rubicon with everything but the hardtop. To me it runs fine with
> : the exception of this gross gas mileage. Something has to be wrong.
>
> : Even though I do 95% of my driving in the city, I seldom get above 2 grand
> : in either 4th or 5th gear. I am not a "lead-foot." In fact, I "baby the
> : thing" since it is so new. You are in 4th gear at 40 mph with this
> : transmission and rear end. So I usually don't go over 40 in the city, only
> : occasionally getting to 5th on some longer stretches and of course, 6th on
> : the highway.
>
> : What could be causing such terrible gas mileage? I understand that new
> : motors use a little more fuel during break-in, but this is half of the
> : rating (which I realize is not real-world). I am not running the AC at this
> : point in the year yet either.
>
> : Any explanations, suggestions, and/or "fixes" would be greatly appreciated.
> : I will also call the dealership and report the extremely poor mileage.
>
> : Thanks very much,
>
> : Campbell Freeman
> : South Carolina
>
>
--
Jerry Bransford
PP-ASEL N6TAY
See the Geezer Jeep at
http://members.***.net/jerrypb/
#19
Guest
Posts: n/a
Re: 2005 Rubicon Gas Mileage
Your Rubicon has 33" tires and 4.10 gearing, not a great ratio for that
size tire. Regearing to 4.56 would restore the power caused by that
4.10/33" combination.
Jerry
Jeff Hendron wrote:
> I have a 2003 Wrangler Rubicon with the 5 spd, 33x12.50 tires, and ~10,000
> miles on it. I drove it to Moab from Colorado Springs in March and I checked
> the mileage on two tanks of gas. They were both a combination of two lane
> highways, and Interstate 70 driving. The first tank I checked I got 17.6
> mpg, and 17.8 on the second. I was holding it to 65 mph on the interstate.
>
> I don't have a problem with the gas mileage as much as the lack of power. My
> 1991 Wrangler with 4.0L/5sp had a lot more power than my Rubicon! I wonder if
> anyone has tried a non Rubicon ecm in a Rubicon? And would it be as easy as
> unplugging the stock one and plugging in a non Rubicon one or do they interface
> differently?
>
>
> Jeff Hendron 2003 Jeep Wrangler Rubicon
> MatrixOne Support Skyjacker 4" lift, JKS Disconnects
> Agilent Technologies Fabtech Front Bumper, Rock Krusher Rear Bumper
> Co Springs, Colorado Rock Krusher Rock Rails, Custom Swingout Tire Carrier
> (719) 531-4319 33x12.50 Goodyear MTR's, Mickey Thompson Classic Lock Wheels
> jeff_hendron@agilent.com Bush Whacker Fender Flares, Warn XD9000i Winch
>
> Yamaha WR250ZF
>
> Campbell C Freeman <campbellcfreeman@earthlink.net> wrote:
> : Hello,
>
> : I have a 2005 Rubicon, which I purchased about 2.5 months ago and it
> : currently has 1,800 miles. I noticed shortly after driving it for a few
> : days, that the gas gauge seemed to move to the left rather quickly. I also
> : seemed to be putting gas in it much more often that my 2001 TJ, which I used
> : as a trade. I did the "fill-er-up, same place, same pump, same delivery
> : rate, & cut-off at the pump routine" for a week or two and was amazed to see
> : an average of 10 mpg. The Rubicon (with California Emissions), has an EPA
> : Rating of 15/19, whereas my 2001 TJ had a rating of 16/19. I averaged about
> : 16 mpg with my 2001. Most of my driving is city.
>
> : I did a VIN recall inquiry search on the www.Jeep.com site and found there
> : was an outstanding Emissions Recall - Reprogram PCM: Notification Code D46,
> : for this vehicle. The incorrect version of software was initially &
> : originally programmed into the Powertrain Control Module (PCM), which "could
> : cause the On-Board Diagnostic (OBD) fuel system monitor to malfunction." I
> : called my dealer that day and scheduled an appointment to have the computer
> : reprogrammed. Interestingly enough, that same day I received the exact same
> : recall notice from DaimlerChrysler in the US Mail.
>
> : I took the Rubicon in the next day...reprogramming took about an hour, and
> : off I went. I took a trip out-of-town over the weekend, did some highway
> : driving, and averaged about 17 mpg on 2 tanks of fuel. Three days later I
> : was driving along in town when the Engine Light came on, began flashing, and
> : the motor was running on 5/6 cylinders; skipping horribly. I pulled in to
> : where I was going and called D/C 24 Hour Roadside Assistance. A tow truck
> : was there in under 20 minutes, and off 'she' went to the dealer. Next day
> : I was there when they opened, and stayed to find out what was the matter.
> : The technician told me the computer code said "running lean." He found gas
> : all over the # 6 spark plug and it was fouled. He replaced it but it still
> : ran rough. Next he replaced the injector for that cylinder and that took
> : care of the problem. Off I go, and 'she' is running just fine, but I am
> : still getting 9-10 mpg in the city. This is the 4.0 L I6 w/ a 6 speed
> : manual (the 'new' German transmission), and a 4.11 gear ratio. It is a
> : "stock" Rubicon with everything but the hardtop. To me it runs fine with
> : the exception of this gross gas mileage. Something has to be wrong.
>
> : Even though I do 95% of my driving in the city, I seldom get above 2 grand
> : in either 4th or 5th gear. I am not a "lead-foot." In fact, I "baby the
> : thing" since it is so new. You are in 4th gear at 40 mph with this
> : transmission and rear end. So I usually don't go over 40 in the city, only
> : occasionally getting to 5th on some longer stretches and of course, 6th on
> : the highway.
>
> : What could be causing such terrible gas mileage? I understand that new
> : motors use a little more fuel during break-in, but this is half of the
> : rating (which I realize is not real-world). I am not running the AC at this
> : point in the year yet either.
>
> : Any explanations, suggestions, and/or "fixes" would be greatly appreciated.
> : I will also call the dealership and report the extremely poor mileage.
>
> : Thanks very much,
>
> : Campbell Freeman
> : South Carolina
>
>
--
Jerry Bransford
PP-ASEL N6TAY
See the Geezer Jeep at
http://members.***.net/jerrypb/
size tire. Regearing to 4.56 would restore the power caused by that
4.10/33" combination.
Jerry
Jeff Hendron wrote:
> I have a 2003 Wrangler Rubicon with the 5 spd, 33x12.50 tires, and ~10,000
> miles on it. I drove it to Moab from Colorado Springs in March and I checked
> the mileage on two tanks of gas. They were both a combination of two lane
> highways, and Interstate 70 driving. The first tank I checked I got 17.6
> mpg, and 17.8 on the second. I was holding it to 65 mph on the interstate.
>
> I don't have a problem with the gas mileage as much as the lack of power. My
> 1991 Wrangler with 4.0L/5sp had a lot more power than my Rubicon! I wonder if
> anyone has tried a non Rubicon ecm in a Rubicon? And would it be as easy as
> unplugging the stock one and plugging in a non Rubicon one or do they interface
> differently?
>
>
> Jeff Hendron 2003 Jeep Wrangler Rubicon
> MatrixOne Support Skyjacker 4" lift, JKS Disconnects
> Agilent Technologies Fabtech Front Bumper, Rock Krusher Rear Bumper
> Co Springs, Colorado Rock Krusher Rock Rails, Custom Swingout Tire Carrier
> (719) 531-4319 33x12.50 Goodyear MTR's, Mickey Thompson Classic Lock Wheels
> jeff_hendron@agilent.com Bush Whacker Fender Flares, Warn XD9000i Winch
>
> Yamaha WR250ZF
>
> Campbell C Freeman <campbellcfreeman@earthlink.net> wrote:
> : Hello,
>
> : I have a 2005 Rubicon, which I purchased about 2.5 months ago and it
> : currently has 1,800 miles. I noticed shortly after driving it for a few
> : days, that the gas gauge seemed to move to the left rather quickly. I also
> : seemed to be putting gas in it much more often that my 2001 TJ, which I used
> : as a trade. I did the "fill-er-up, same place, same pump, same delivery
> : rate, & cut-off at the pump routine" for a week or two and was amazed to see
> : an average of 10 mpg. The Rubicon (with California Emissions), has an EPA
> : Rating of 15/19, whereas my 2001 TJ had a rating of 16/19. I averaged about
> : 16 mpg with my 2001. Most of my driving is city.
>
> : I did a VIN recall inquiry search on the www.Jeep.com site and found there
> : was an outstanding Emissions Recall - Reprogram PCM: Notification Code D46,
> : for this vehicle. The incorrect version of software was initially &
> : originally programmed into the Powertrain Control Module (PCM), which "could
> : cause the On-Board Diagnostic (OBD) fuel system monitor to malfunction." I
> : called my dealer that day and scheduled an appointment to have the computer
> : reprogrammed. Interestingly enough, that same day I received the exact same
> : recall notice from DaimlerChrysler in the US Mail.
>
> : I took the Rubicon in the next day...reprogramming took about an hour, and
> : off I went. I took a trip out-of-town over the weekend, did some highway
> : driving, and averaged about 17 mpg on 2 tanks of fuel. Three days later I
> : was driving along in town when the Engine Light came on, began flashing, and
> : the motor was running on 5/6 cylinders; skipping horribly. I pulled in to
> : where I was going and called D/C 24 Hour Roadside Assistance. A tow truck
> : was there in under 20 minutes, and off 'she' went to the dealer. Next day
> : I was there when they opened, and stayed to find out what was the matter.
> : The technician told me the computer code said "running lean." He found gas
> : all over the # 6 spark plug and it was fouled. He replaced it but it still
> : ran rough. Next he replaced the injector for that cylinder and that took
> : care of the problem. Off I go, and 'she' is running just fine, but I am
> : still getting 9-10 mpg in the city. This is the 4.0 L I6 w/ a 6 speed
> : manual (the 'new' German transmission), and a 4.11 gear ratio. It is a
> : "stock" Rubicon with everything but the hardtop. To me it runs fine with
> : the exception of this gross gas mileage. Something has to be wrong.
>
> : Even though I do 95% of my driving in the city, I seldom get above 2 grand
> : in either 4th or 5th gear. I am not a "lead-foot." In fact, I "baby the
> : thing" since it is so new. You are in 4th gear at 40 mph with this
> : transmission and rear end. So I usually don't go over 40 in the city, only
> : occasionally getting to 5th on some longer stretches and of course, 6th on
> : the highway.
>
> : What could be causing such terrible gas mileage? I understand that new
> : motors use a little more fuel during break-in, but this is half of the
> : rating (which I realize is not real-world). I am not running the AC at this
> : point in the year yet either.
>
> : Any explanations, suggestions, and/or "fixes" would be greatly appreciated.
> : I will also call the dealership and report the extremely poor mileage.
>
> : Thanks very much,
>
> : Campbell Freeman
> : South Carolina
>
>
--
Jerry Bransford
PP-ASEL N6TAY
See the Geezer Jeep at
http://members.***.net/jerrypb/
#20
Guest
Posts: n/a
Re: 2005 Rubicon Gas Mileage
Your Rubicon has 33" tires and 4.10 gearing, not a great ratio for that
size tire. Regearing to 4.56 would restore the power caused by that
4.10/33" combination.
Jerry
Jeff Hendron wrote:
> I have a 2003 Wrangler Rubicon with the 5 spd, 33x12.50 tires, and ~10,000
> miles on it. I drove it to Moab from Colorado Springs in March and I checked
> the mileage on two tanks of gas. They were both a combination of two lane
> highways, and Interstate 70 driving. The first tank I checked I got 17.6
> mpg, and 17.8 on the second. I was holding it to 65 mph on the interstate.
>
> I don't have a problem with the gas mileage as much as the lack of power. My
> 1991 Wrangler with 4.0L/5sp had a lot more power than my Rubicon! I wonder if
> anyone has tried a non Rubicon ecm in a Rubicon? And would it be as easy as
> unplugging the stock one and plugging in a non Rubicon one or do they interface
> differently?
>
>
> Jeff Hendron 2003 Jeep Wrangler Rubicon
> MatrixOne Support Skyjacker 4" lift, JKS Disconnects
> Agilent Technologies Fabtech Front Bumper, Rock Krusher Rear Bumper
> Co Springs, Colorado Rock Krusher Rock Rails, Custom Swingout Tire Carrier
> (719) 531-4319 33x12.50 Goodyear MTR's, Mickey Thompson Classic Lock Wheels
> jeff_hendron@agilent.com Bush Whacker Fender Flares, Warn XD9000i Winch
>
> Yamaha WR250ZF
>
> Campbell C Freeman <campbellcfreeman@earthlink.net> wrote:
> : Hello,
>
> : I have a 2005 Rubicon, which I purchased about 2.5 months ago and it
> : currently has 1,800 miles. I noticed shortly after driving it for a few
> : days, that the gas gauge seemed to move to the left rather quickly. I also
> : seemed to be putting gas in it much more often that my 2001 TJ, which I used
> : as a trade. I did the "fill-er-up, same place, same pump, same delivery
> : rate, & cut-off at the pump routine" for a week or two and was amazed to see
> : an average of 10 mpg. The Rubicon (with California Emissions), has an EPA
> : Rating of 15/19, whereas my 2001 TJ had a rating of 16/19. I averaged about
> : 16 mpg with my 2001. Most of my driving is city.
>
> : I did a VIN recall inquiry search on the www.Jeep.com site and found there
> : was an outstanding Emissions Recall - Reprogram PCM: Notification Code D46,
> : for this vehicle. The incorrect version of software was initially &
> : originally programmed into the Powertrain Control Module (PCM), which "could
> : cause the On-Board Diagnostic (OBD) fuel system monitor to malfunction." I
> : called my dealer that day and scheduled an appointment to have the computer
> : reprogrammed. Interestingly enough, that same day I received the exact same
> : recall notice from DaimlerChrysler in the US Mail.
>
> : I took the Rubicon in the next day...reprogramming took about an hour, and
> : off I went. I took a trip out-of-town over the weekend, did some highway
> : driving, and averaged about 17 mpg on 2 tanks of fuel. Three days later I
> : was driving along in town when the Engine Light came on, began flashing, and
> : the motor was running on 5/6 cylinders; skipping horribly. I pulled in to
> : where I was going and called D/C 24 Hour Roadside Assistance. A tow truck
> : was there in under 20 minutes, and off 'she' went to the dealer. Next day
> : I was there when they opened, and stayed to find out what was the matter.
> : The technician told me the computer code said "running lean." He found gas
> : all over the # 6 spark plug and it was fouled. He replaced it but it still
> : ran rough. Next he replaced the injector for that cylinder and that took
> : care of the problem. Off I go, and 'she' is running just fine, but I am
> : still getting 9-10 mpg in the city. This is the 4.0 L I6 w/ a 6 speed
> : manual (the 'new' German transmission), and a 4.11 gear ratio. It is a
> : "stock" Rubicon with everything but the hardtop. To me it runs fine with
> : the exception of this gross gas mileage. Something has to be wrong.
>
> : Even though I do 95% of my driving in the city, I seldom get above 2 grand
> : in either 4th or 5th gear. I am not a "lead-foot." In fact, I "baby the
> : thing" since it is so new. You are in 4th gear at 40 mph with this
> : transmission and rear end. So I usually don't go over 40 in the city, only
> : occasionally getting to 5th on some longer stretches and of course, 6th on
> : the highway.
>
> : What could be causing such terrible gas mileage? I understand that new
> : motors use a little more fuel during break-in, but this is half of the
> : rating (which I realize is not real-world). I am not running the AC at this
> : point in the year yet either.
>
> : Any explanations, suggestions, and/or "fixes" would be greatly appreciated.
> : I will also call the dealership and report the extremely poor mileage.
>
> : Thanks very much,
>
> : Campbell Freeman
> : South Carolina
>
>
--
Jerry Bransford
PP-ASEL N6TAY
See the Geezer Jeep at
http://members.***.net/jerrypb/
size tire. Regearing to 4.56 would restore the power caused by that
4.10/33" combination.
Jerry
Jeff Hendron wrote:
> I have a 2003 Wrangler Rubicon with the 5 spd, 33x12.50 tires, and ~10,000
> miles on it. I drove it to Moab from Colorado Springs in March and I checked
> the mileage on two tanks of gas. They were both a combination of two lane
> highways, and Interstate 70 driving. The first tank I checked I got 17.6
> mpg, and 17.8 on the second. I was holding it to 65 mph on the interstate.
>
> I don't have a problem with the gas mileage as much as the lack of power. My
> 1991 Wrangler with 4.0L/5sp had a lot more power than my Rubicon! I wonder if
> anyone has tried a non Rubicon ecm in a Rubicon? And would it be as easy as
> unplugging the stock one and plugging in a non Rubicon one or do they interface
> differently?
>
>
> Jeff Hendron 2003 Jeep Wrangler Rubicon
> MatrixOne Support Skyjacker 4" lift, JKS Disconnects
> Agilent Technologies Fabtech Front Bumper, Rock Krusher Rear Bumper
> Co Springs, Colorado Rock Krusher Rock Rails, Custom Swingout Tire Carrier
> (719) 531-4319 33x12.50 Goodyear MTR's, Mickey Thompson Classic Lock Wheels
> jeff_hendron@agilent.com Bush Whacker Fender Flares, Warn XD9000i Winch
>
> Yamaha WR250ZF
>
> Campbell C Freeman <campbellcfreeman@earthlink.net> wrote:
> : Hello,
>
> : I have a 2005 Rubicon, which I purchased about 2.5 months ago and it
> : currently has 1,800 miles. I noticed shortly after driving it for a few
> : days, that the gas gauge seemed to move to the left rather quickly. I also
> : seemed to be putting gas in it much more often that my 2001 TJ, which I used
> : as a trade. I did the "fill-er-up, same place, same pump, same delivery
> : rate, & cut-off at the pump routine" for a week or two and was amazed to see
> : an average of 10 mpg. The Rubicon (with California Emissions), has an EPA
> : Rating of 15/19, whereas my 2001 TJ had a rating of 16/19. I averaged about
> : 16 mpg with my 2001. Most of my driving is city.
>
> : I did a VIN recall inquiry search on the www.Jeep.com site and found there
> : was an outstanding Emissions Recall - Reprogram PCM: Notification Code D46,
> : for this vehicle. The incorrect version of software was initially &
> : originally programmed into the Powertrain Control Module (PCM), which "could
> : cause the On-Board Diagnostic (OBD) fuel system monitor to malfunction." I
> : called my dealer that day and scheduled an appointment to have the computer
> : reprogrammed. Interestingly enough, that same day I received the exact same
> : recall notice from DaimlerChrysler in the US Mail.
>
> : I took the Rubicon in the next day...reprogramming took about an hour, and
> : off I went. I took a trip out-of-town over the weekend, did some highway
> : driving, and averaged about 17 mpg on 2 tanks of fuel. Three days later I
> : was driving along in town when the Engine Light came on, began flashing, and
> : the motor was running on 5/6 cylinders; skipping horribly. I pulled in to
> : where I was going and called D/C 24 Hour Roadside Assistance. A tow truck
> : was there in under 20 minutes, and off 'she' went to the dealer. Next day
> : I was there when they opened, and stayed to find out what was the matter.
> : The technician told me the computer code said "running lean." He found gas
> : all over the # 6 spark plug and it was fouled. He replaced it but it still
> : ran rough. Next he replaced the injector for that cylinder and that took
> : care of the problem. Off I go, and 'she' is running just fine, but I am
> : still getting 9-10 mpg in the city. This is the 4.0 L I6 w/ a 6 speed
> : manual (the 'new' German transmission), and a 4.11 gear ratio. It is a
> : "stock" Rubicon with everything but the hardtop. To me it runs fine with
> : the exception of this gross gas mileage. Something has to be wrong.
>
> : Even though I do 95% of my driving in the city, I seldom get above 2 grand
> : in either 4th or 5th gear. I am not a "lead-foot." In fact, I "baby the
> : thing" since it is so new. You are in 4th gear at 40 mph with this
> : transmission and rear end. So I usually don't go over 40 in the city, only
> : occasionally getting to 5th on some longer stretches and of course, 6th on
> : the highway.
>
> : What could be causing such terrible gas mileage? I understand that new
> : motors use a little more fuel during break-in, but this is half of the
> : rating (which I realize is not real-world). I am not running the AC at this
> : point in the year yet either.
>
> : Any explanations, suggestions, and/or "fixes" would be greatly appreciated.
> : I will also call the dealership and report the extremely poor mileage.
>
> : Thanks very much,
>
> : Campbell Freeman
> : South Carolina
>
>
--
Jerry Bransford
PP-ASEL N6TAY
See the Geezer Jeep at
http://members.***.net/jerrypb/