Re: TJ engine swap - 4.0 to something with better MPG?
 

I agree with Jerry. I have a built TJ (35" tires) and I get the same as he
mentioned. I am between 2000 and 2800 RPMs' on the highway to keep the
engine in it's sweet spot. I run 488 gears. The slower I go on the highway
relates to better mileage. I'm planning a trip cross country and I've
factored in the fact that I will have to leave a day earlier. Go slower.

Andy
2001 TJ

"Jerry Bransford" <jerrypb@cox.net> wrote in message
news:8S2Wc.125987$sh.71214@fed1read06...
> 12-14 around town and 16 on the freeway is NORMAL for a Wrangler. It's
> neither low nor high. My own Wrangler, built, gets right around 12.5 to
13
> mpg all-around driving with obviously a bit more on the highway if I keep
my
> speed down. The big issue is the Wrangler's barn door aerodynamics which
> don't help with fuel economy. Even the Grand Cherokee with the same
engine
> will get better fuel economy due to it's vastly better aerodynamics.
>
> The bottom line is that it's a Jeep Wrangler that is built for offroading,
> it's not an econo-box or car that has more going for it so far as having
> more potential for better economy. Once again... if you can't live with
> that fuel economy, it's time to get something else to drive.... Jeeps
aren't
> for you.
>
> Jerry
> --
> Jerry Bransford
> PP-ASEL N6TAY
> See the Geezer Jeep at
> http://members.cox.net/jerrypb/
> "DougW" <post.replies@invalid.address> wrote in message
> news:lH2Wc.57830$wo.52540@okepread06...
> > munchiechee did pass the time by typing:
> > > I have a 97 TJ 4.0/manual thats been great on road and off - the only
> > > consistent problem I have with the Jeep is the MPGs, way less than
> > > advertised, I'm averaging 12-14 in city and about 16 on freeway.
> > >
> > > I've checked everything out possible, and even taken it to the
> > > stealer; either I have a very heavy foot or I just have a thirsty
> > > jeep.
> >
> > What you would spend on doing this would be much much much much much
> > more than what you would save on fuel. As Hesco says, "Speed costs
> > money, how fast do you want to go?"
> >
> > Your 4.0 should be getting better than that. Let's start off with
> > the basics.
> >
> > Plugs, Wires, Rotor, Cap
> >
> > Clean the IAP http://members.cox.net/wilsond/tb/tb.html
> >
> > If the plugs show rich (excess carbon) then you should replace
> > the O2 sensor. Yes, it can set a code but the O2 sensor will drift
> > off long before any codes get set.
> >
> > Depending on how long you have ran the cat might need replacement.
> >
> > You should also check your exhaust header for cracks. The 4.0 header
> > is notorious for this. You know it's cracked when the engine sounds
> > like a diesel or you start getting what sounds like lifter noise.
> >
> > Switch out to full synthetic if you haven't already, that's good for
> > a teeny improvement.
> >
> > But by and far the best way to reduce fuel use is to take it slow and
> > easy. The goal on the highway is to not have to use the brakes. And
> > try not to beat folks to a red light. :) I tried driving like that for
> > a couple of tanks and it made a 4mpg difference in my city driving.
> > (then again my ZJ can gulp fuel)
> >
> > --
> > -- DougW -- 93 ZJ 4.0 http://members.cox.net/wilsond
> > HESCO Supercharger - 300W IASCA Stereo - Edelbrock IAS Shocks
> > Gibson Exhaust - rear DCpower - custom gauge install - Stillen Rotors
> > Banks Header - and BEER, in the fridge!
> >
> >
>
>

Re: TJ engine swap - 4.0 to something with better MPG?
 

I agree with Jerry. I have a built TJ (35" tires) and I get the same as he
mentioned. I am between 2000 and 2800 RPMs' on the highway to keep the
engine in it's sweet spot. I run 488 gears. The slower I go on the highway
relates to better mileage. I'm planning a trip cross country and I've
factored in the fact that I will have to leave a day earlier. Go slower.

Andy
2001 TJ

"Jerry Bransford" <jerrypb@cox.net> wrote in message
news:8S2Wc.125987$sh.71214@fed1read06...
> 12-14 around town and 16 on the freeway is NORMAL for a Wrangler. It's
> neither low nor high. My own Wrangler, built, gets right around 12.5 to
13
> mpg all-around driving with obviously a bit more on the highway if I keep
my
> speed down. The big issue is the Wrangler's barn door aerodynamics which
> don't help with fuel economy. Even the Grand Cherokee with the same
engine
> will get better fuel economy due to it's vastly better aerodynamics.
>
> The bottom line is that it's a Jeep Wrangler that is built for offroading,
> it's not an econo-box or car that has more going for it so far as having
> more potential for better economy. Once again... if you can't live with
> that fuel economy, it's time to get something else to drive.... Jeeps
aren't
> for you.
>
> Jerry
> --
> Jerry Bransford
> PP-ASEL N6TAY
> See the Geezer Jeep at
> http://members.cox.net/jerrypb/
> "DougW" <post.replies@invalid.address> wrote in message
> news:lH2Wc.57830$wo.52540@okepread06...
> > munchiechee did pass the time by typing:
> > > I have a 97 TJ 4.0/manual thats been great on road and off - the only
> > > consistent problem I have with the Jeep is the MPGs, way less than
> > > advertised, I'm averaging 12-14 in city and about 16 on freeway.
> > >
> > > I've checked everything out possible, and even taken it to the
> > > stealer; either I have a very heavy foot or I just have a thirsty
> > > jeep.
> >
> > What you would spend on doing this would be much much much much much
> > more than what you would save on fuel. As Hesco says, "Speed costs
> > money, how fast do you want to go?"
> >
> > Your 4.0 should be getting better than that. Let's start off with
> > the basics.
> >
> > Plugs, Wires, Rotor, Cap
> >
> > Clean the IAP http://members.cox.net/wilsond/tb/tb.html
> >
> > If the plugs show rich (excess carbon) then you should replace
> > the O2 sensor. Yes, it can set a code but the O2 sensor will drift
> > off long before any codes get set.
> >
> > Depending on how long you have ran the cat might need replacement.
> >
> > You should also check your exhaust header for cracks. The 4.0 header
> > is notorious for this. You know it's cracked when the engine sounds
> > like a diesel or you start getting what sounds like lifter noise.
> >
> > Switch out to full synthetic if you haven't already, that's good for
> > a teeny improvement.
> >
> > But by and far the best way to reduce fuel use is to take it slow and
> > easy. The goal on the highway is to not have to use the brakes. And
> > try not to beat folks to a red light. :) I tried driving like that for
> > a couple of tanks and it made a 4mpg difference in my city driving.
> > (then again my ZJ can gulp fuel)
> >
> > --
> > -- DougW -- 93 ZJ 4.0 http://members.cox.net/wilsond
> > HESCO Supercharger - 300W IASCA Stereo - Edelbrock IAS Shocks
> > Gibson Exhaust - rear DCpower - custom gauge install - Stillen Rotors
> > Banks Header - and BEER, in the fridge!
> >
> >
>
>

Re: TJ engine swap - 4.0 to something with better MPG?
 

I agree with Jerry. I have a built TJ (35" tires) and I get the same as he
mentioned. I am between 2000 and 2800 RPMs' on the highway to keep the
engine in it's sweet spot. I run 488 gears. The slower I go on the highway
relates to better mileage. I'm planning a trip cross country and I've
factored in the fact that I will have to leave a day earlier. Go slower.

Andy
2001 TJ

"Jerry Bransford" <jerrypb@cox.net> wrote in message
news:8S2Wc.125987$sh.71214@fed1read06...
> 12-14 around town and 16 on the freeway is NORMAL for a Wrangler. It's
> neither low nor high. My own Wrangler, built, gets right around 12.5 to
13
> mpg all-around driving with obviously a bit more on the highway if I keep
my
> speed down. The big issue is the Wrangler's barn door aerodynamics which
> don't help with fuel economy. Even the Grand Cherokee with the same
engine
> will get better fuel economy due to it's vastly better aerodynamics.
>
> The bottom line is that it's a Jeep Wrangler that is built for offroading,
> it's not an econo-box or car that has more going for it so far as having
> more potential for better economy. Once again... if you can't live with
> that fuel economy, it's time to get something else to drive.... Jeeps
aren't
> for you.
>
> Jerry
> --
> Jerry Bransford
> PP-ASEL N6TAY
> See the Geezer Jeep at
> http://members.cox.net/jerrypb/
> "DougW" <post.replies@invalid.address> wrote in message
> news:lH2Wc.57830$wo.52540@okepread06...
> > munchiechee did pass the time by typing:
> > > I have a 97 TJ 4.0/manual thats been great on road and off - the only
> > > consistent problem I have with the Jeep is the MPGs, way less than
> > > advertised, I'm averaging 12-14 in city and about 16 on freeway.
> > >
> > > I've checked everything out possible, and even taken it to the
> > > stealer; either I have a very heavy foot or I just have a thirsty
> > > jeep.
> >
> > What you would spend on doing this would be much much much much much
> > more than what you would save on fuel. As Hesco says, "Speed costs
> > money, how fast do you want to go?"
> >
> > Your 4.0 should be getting better than that. Let's start off with
> > the basics.
> >
> > Plugs, Wires, Rotor, Cap
> >
> > Clean the IAP http://members.cox.net/wilsond/tb/tb.html
> >
> > If the plugs show rich (excess carbon) then you should replace
> > the O2 sensor. Yes, it can set a code but the O2 sensor will drift
> > off long before any codes get set.
> >
> > Depending on how long you have ran the cat might need replacement.
> >
> > You should also check your exhaust header for cracks. The 4.0 header
> > is notorious for this. You know it's cracked when the engine sounds
> > like a diesel or you start getting what sounds like lifter noise.
> >
> > Switch out to full synthetic if you haven't already, that's good for
> > a teeny improvement.
> >
> > But by and far the best way to reduce fuel use is to take it slow and
> > easy. The goal on the highway is to not have to use the brakes. And
> > try not to beat folks to a red light. :) I tried driving like that for
> > a couple of tanks and it made a 4mpg difference in my city driving.
> > (then again my ZJ can gulp fuel)
> >
> > --
> > -- DougW -- 93 ZJ 4.0 http://members.cox.net/wilsond
> > HESCO Supercharger - 300W IASCA Stereo - Edelbrock IAS Shocks
> > Gibson Exhaust - rear DCpower - custom gauge install - Stillen Rotors
> > Banks Header - and BEER, in the fridge!
> >
> >
>
>

Re: TJ engine swap - 4.0 to something with better MPG?
 

TROLL!
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

munchiechee wrote:
><snip>

Re: TJ engine swap - 4.0 to something with better MPG?
 

TROLL!
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

munchiechee wrote:
><snip>

Re: TJ engine swap - 4.0 to something with better MPG?
 

TROLL!
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

munchiechee wrote:
><snip>

Re: TJ engine swap - 4.0 to something with better MPG?
 

TROLL!
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

munchiechee wrote:
><snip>

Re: TJ engine swap - 4.0 to something with better MPG?
 

Dear elitist prigs,

Of course I don't mean to address the posters who replied in a
friendly kind of way, but the majority of you stuck up elitists chose
to make hay out of my being better served by a different car.

I asked if it was possible to drop in a more efficent powertrain on a
Jeep because I'm annoyed by low teens in the MPG. If thats whats
Jeeps get, well congratulations to all of you for being satisfied with
an inefficient auto in 2004- in my opinion the extremely low MPG on
the TJ is hilariously low for a modern vehicle.

If its an aerodynamics issue than there 4 banger shouldn't get better
MPG - period. SO it stands to reason that the aged 6 cylinder in the
Jeep is the reason.

Of course it is always amusing to watch the self-proclaimed experts on
the Jeep board strut around as if anyone who doesn't share their
WEALTH of knowledge and insight, and in this case, acceptance of a
crappy aspect of a jeep is better suited in a different auto -
I'll keep the TJ, thanks - and your opinions of whether I'm "suited"
for it or not can keep your collective heads company up your bums.

Re: TJ engine swap - 4.0 to something with better MPG?
 

Dear elitist prigs,

Of course I don't mean to address the posters who replied in a
friendly kind of way, but the majority of you stuck up elitists chose
to make hay out of my being better served by a different car.

I asked if it was possible to drop in a more efficent powertrain on a
Jeep because I'm annoyed by low teens in the MPG. If thats whats
Jeeps get, well congratulations to all of you for being satisfied with
an inefficient auto in 2004- in my opinion the extremely low MPG on
the TJ is hilariously low for a modern vehicle.

If its an aerodynamics issue than there 4 banger shouldn't get better
MPG - period. SO it stands to reason that the aged 6 cylinder in the
Jeep is the reason.

Of course it is always amusing to watch the self-proclaimed experts on
the Jeep board strut around as if anyone who doesn't share their
WEALTH of knowledge and insight, and in this case, acceptance of a
crappy aspect of a jeep is better suited in a different auto -
I'll keep the TJ, thanks - and your opinions of whether I'm "suited"
for it or not can keep your collective heads company up your bums.

Re: TJ engine swap - 4.0 to something with better MPG?
 

Dear elitist prigs,

Of course I don't mean to address the posters who replied in a
friendly kind of way, but the majority of you stuck up elitists chose
to make hay out of my being better served by a different car.

I asked if it was possible to drop in a more efficent powertrain on a
Jeep because I'm annoyed by low teens in the MPG. If thats whats
Jeeps get, well congratulations to all of you for being satisfied with
an inefficient auto in 2004- in my opinion the extremely low MPG on
the TJ is hilariously low for a modern vehicle.

If its an aerodynamics issue than there 4 banger shouldn't get better
MPG - period. SO it stands to reason that the aged 6 cylinder in the
Jeep is the reason.

Of course it is always amusing to watch the self-proclaimed experts on
the Jeep board strut around as if anyone who doesn't share their
WEALTH of knowledge and insight, and in this case, acceptance of a
crappy aspect of a jeep is better suited in a different auto -
I'll keep the TJ, thanks - and your opinions of whether I'm "suited"
for it or not can keep your collective heads company up your bums.