I have a 4.0 2001 Chrokee that gets 13.5 mpg. All Stock, 30k miles,
new tires, dealer says nothing obvious (they want $800 to do the 30k
tune up, of course). I put some fuel injector cleaner in the tank 2
tanks ago and it didn't seem to help. I've never owned one of these,
and it seems pretty loud. It sounds like the autochoke is on most of
the time as it has that loud, "air" type noise that, in other motors,
goes away once they are warm and goes to a finer sewing machine-type
sound. This never goes away- always loud. RMP's are correct though.

Any ideas anyone??

Mark

 

Hmmm....

I get 19 in my old CJ7 and 22+ in my 88 Cherokee....

If you have a vacuum leak, the computer can go full rich to compensate.

Same deal if you have a dead O2 sensor.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

Mark wrote:
>
> I have a 4.0 2001 Chrokee that gets 13.5 mpg. All Stock, 30k miles,
> new tires, dealer says nothing obvious (they want $800 to do the 30k
> tune up, of course). I put some fuel injector cleaner in the tank 2
> tanks ago and it didn't seem to help. I've never owned one of these,
> and it seems pretty loud. It sounds like the autochoke is on most of
> the time as it has that loud, "air" type noise that, in other motors,
> goes away once they are warm and goes to a finer sewing machine-type
> sound. This never goes away- always loud. RMP's are correct though.
>
> Any ideas anyone??
>
> Mark

 

Hmmm....

I get 19 in my old CJ7 and 22+ in my 88 Cherokee....

If you have a vacuum leak, the computer can go full rich to compensate.

Same deal if you have a dead O2 sensor.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

Mark wrote:
>
> I have a 4.0 2001 Chrokee that gets 13.5 mpg. All Stock, 30k miles,
> new tires, dealer says nothing obvious (they want $800 to do the 30k
> tune up, of course). I put some fuel injector cleaner in the tank 2
> tanks ago and it didn't seem to help. I've never owned one of these,
> and it seems pretty loud. It sounds like the autochoke is on most of
> the time as it has that loud, "air" type noise that, in other motors,
> goes away once they are warm and goes to a finer sewing machine-type
> sound. This never goes away- always loud. RMP's are correct though.
>
> Any ideas anyone??
>
> Mark

 

Hmmm....

I get 19 in my old CJ7 and 22+ in my 88 Cherokee....

If you have a vacuum leak, the computer can go full rich to compensate.

Same deal if you have a dead O2 sensor.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

Mark wrote:
>
> I have a 4.0 2001 Chrokee that gets 13.5 mpg. All Stock, 30k miles,
> new tires, dealer says nothing obvious (they want $800 to do the 30k
> tune up, of course). I put some fuel injector cleaner in the tank 2
> tanks ago and it didn't seem to help. I've never owned one of these,
> and it seems pretty loud. It sounds like the autochoke is on most of
> the time as it has that loud, "air" type noise that, in other motors,
> goes away once they are warm and goes to a finer sewing machine-type
> sound. This never goes away- always loud. RMP's are correct though.
>
> Any ideas anyone??
>
> Mark

 

On 31 Oct 2003 12:33:43 -0800, mrodholm@lrs.com (Mark) wrote:

>I have a 4.0 2001 Chrokee that gets 13.5 mpg. All Stock, 30k miles,

<snip>

Street, highway or overall? On the streets that is about my average as
well on my '98 with 30" tires. These days I mostly drive on the streets
as well and my Jeep is in tip-top shape. On the highway if I can keep
the Jeep under 80MPH I see around 18MPG and if I cruise at the limit,
20MPG....

I'd say you are about on target going by my own numbers...


--
Taylor

'89 Audi 200
'03 Audi S6 Avant
'98 Jeep Cherokee Sport

 

On 31 Oct 2003 12:33:43 -0800, mrodholm@lrs.com (Mark) wrote:

>I have a 4.0 2001 Chrokee that gets 13.5 mpg. All Stock, 30k miles,

<snip>

Street, highway or overall? On the streets that is about my average as
well on my '98 with 30" tires. These days I mostly drive on the streets
as well and my Jeep is in tip-top shape. On the highway if I can keep
the Jeep under 80MPH I see around 18MPG and if I cruise at the limit,
20MPG....

I'd say you are about on target going by my own numbers...


--
Taylor

'89 Audi 200
'03 Audi S6 Avant
'98 Jeep Cherokee Sport

 

On 31 Oct 2003 12:33:43 -0800, mrodholm@lrs.com (Mark) wrote:

>I have a 4.0 2001 Chrokee that gets 13.5 mpg. All Stock, 30k miles,

<snip>

Street, highway or overall? On the streets that is about my average as
well on my '98 with 30" tires. These days I mostly drive on the streets
as well and my Jeep is in tip-top shape. On the highway if I can keep
the Jeep under 80MPH I see around 18MPG and if I cruise at the limit,
20MPG....

I'd say you are about on target going by my own numbers...


--
Taylor

'89 Audi 200
'03 Audi S6 Avant
'98 Jeep Cherokee Sport

 

I get 12 mpg with 31" tires and 4.56 gears. The best it ever got was 17mpg
My father in laws 88 with a 5 speed got 22 mpg before he sold it.
KH

"Just Taylor" <taylor@wilhelp.com> wrote in message
news:3fb4da32.25886512@wilhelp.com...
> On 31 Oct 2003 12:33:43 -0800, mrodholm@lrs.com (Mark) wrote:
>
> >I have a 4.0 2001 Chrokee that gets 13.5 mpg. All Stock, 30k miles,
>
> <snip>
>
> Street, highway or overall? On the streets that is about my average as
> well on my '98 with 30" tires. These days I mostly drive on the streets
> as well and my Jeep is in tip-top shape. On the highway if I can keep
> the Jeep under 80MPH I see around 18MPG and if I cruise at the limit,
> 20MPG....
>
> I'd say you are about on target going by my own numbers...
>
>
> --
> Taylor
>
> '89 Audi 200
> '03 Audi S6 Avant
> '98 Jeep Cherokee Sport

 

I get 12 mpg with 31" tires and 4.56 gears. The best it ever got was 17mpg
My father in laws 88 with a 5 speed got 22 mpg before he sold it.
KH

"Just Taylor" <taylor@wilhelp.com> wrote in message
news:3fb4da32.25886512@wilhelp.com...
> On 31 Oct 2003 12:33:43 -0800, mrodholm@lrs.com (Mark) wrote:
>
> >I have a 4.0 2001 Chrokee that gets 13.5 mpg. All Stock, 30k miles,
>
> <snip>
>
> Street, highway or overall? On the streets that is about my average as
> well on my '98 with 30" tires. These days I mostly drive on the streets
> as well and my Jeep is in tip-top shape. On the highway if I can keep
> the Jeep under 80MPH I see around 18MPG and if I cruise at the limit,
> 20MPG....
>
> I'd say you are about on target going by my own numbers...
>
>
> --
> Taylor
>
> '89 Audi 200
> '03 Audi S6 Avant
> '98 Jeep Cherokee Sport

 

I get 12 mpg with 31" tires and 4.56 gears. The best it ever got was 17mpg
My father in laws 88 with a 5 speed got 22 mpg before he sold it.
KH

"Just Taylor" <taylor@wilhelp.com> wrote in message
news:3fb4da32.25886512@wilhelp.com...
> On 31 Oct 2003 12:33:43 -0800, mrodholm@lrs.com (Mark) wrote:
>
> >I have a 4.0 2001 Chrokee that gets 13.5 mpg. All Stock, 30k miles,
>
> <snip>
>
> Street, highway or overall? On the streets that is about my average as
> well on my '98 with 30" tires. These days I mostly drive on the streets
> as well and my Jeep is in tip-top shape. On the highway if I can keep
> the Jeep under 80MPH I see around 18MPG and if I cruise at the limit,
> 20MPG....
>
> I'd say you are about on target going by my own numbers...
>
>
> --
> Taylor
>
> '89 Audi 200
> '03 Audi S6 Avant
> '98 Jeep Cherokee Sport