what was said to me to do here is check the carb throttle sender or more the
throttle body itself.....gummed up and covering the throttles'
sensor......if this doesn't solve the problem then you will have done a job
you should have done antway on the 4.0 ...jeep forces the reburn of stuff
that clogs the sensors at a important junction...


"TW" <REMOVE_attw@wave.co.nz> wrote in message
news:e9a3i3$3rk$1@lust.ihug.co.nz...
> Hi, my 01 TJ (4.0L Auto) seems to have lost whatever fuel economy it had
> before. Lately, I can only do about 300kms on a full tank. I am running
> 265/70R16s and an OME lift. These mods did not change the fuel economy
> when they were done two years ago. Could it be that the O2 sensor has
> gone bad? There are no error codes or check light coming up. Every thing
> else feels/runs fine. Any ideas?
>
> Thanks
> TW

 

try checking the pinion angle it calibrates the tires to the speedo and the
pcm

"L.W.(Bill) ------ III" wrote:

> I don't know what your octane ratings are in New Zealand, but as
> our oil companies have had to take a lower grade of crude at seventy
> seven bucks a forty four gallon barrel, the bounce to the ounce has
> suffered. Also, here we have tried to save money by switching from a
> major suppliers of gasoline to something with alcohol in it, knocking
> off about twenty percent in economy and power.
> God Bless America, Bill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> TW wrote:
> >
> > Hi, my 01 TJ (4.0L Auto) seems to have lost whatever fuel economy it had
> > before. Lately, I can only do about 300kms on a full tank. I am
> > running 265/70R16s and an OME lift. These mods did not change the fuel
> > economy when they were done two years ago. Could it be that the O2
> > sensor has gone bad? There are no error codes or check light coming up.
> > Every thing else feels/runs fine. Any ideas?
> >
> > Thanks
> > TW

 

try checking the pinion angle it calibrates the tires to the speedo and the
pcm

"L.W.(Bill) ------ III" wrote:

> I don't know what your octane ratings are in New Zealand, but as
> our oil companies have had to take a lower grade of crude at seventy
> seven bucks a forty four gallon barrel, the bounce to the ounce has
> suffered. Also, here we have tried to save money by switching from a
> major suppliers of gasoline to something with alcohol in it, knocking
> off about twenty percent in economy and power.
> God Bless America, Bill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> TW wrote:
> >
> > Hi, my 01 TJ (4.0L Auto) seems to have lost whatever fuel economy it had
> > before. Lately, I can only do about 300kms on a full tank. I am
> > running 265/70R16s and an OME lift. These mods did not change the fuel
> > economy when they were done two years ago. Could it be that the O2
> > sensor has gone bad? There are no error codes or check light coming up.
> > Every thing else feels/runs fine. Any ideas?
> >
> > Thanks
> > TW

 

try checking the pinion angle it calibrates the tires to the speedo and the
pcm

"L.W.(Bill) ------ III" wrote:

> I don't know what your octane ratings are in New Zealand, but as
> our oil companies have had to take a lower grade of crude at seventy
> seven bucks a forty four gallon barrel, the bounce to the ounce has
> suffered. Also, here we have tried to save money by switching from a
> major suppliers of gasoline to something with alcohol in it, knocking
> off about twenty percent in economy and power.
> God Bless America, Bill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> TW wrote:
> >
> > Hi, my 01 TJ (4.0L Auto) seems to have lost whatever fuel economy it had
> > before. Lately, I can only do about 300kms on a full tank. I am
> > running 265/70R16s and an OME lift. These mods did not change the fuel
> > economy when they were done two years ago. Could it be that the O2
> > sensor has gone bad? There are no error codes or check light coming up.
> > Every thing else feels/runs fine. Any ideas?
> >
> > Thanks
> > TW