Engine Racing While Shifting
 

I was wondering if anyone has experienced this:

Background First- This is a 2003 TJ Sport I-6, 21,000 miles on it
(since Nov when I purchased it new). No modifications whatsoever-
Bone Stock <sniff>

Weather was a little cool this am, low 60's in northern VA.

Leaving the driveway shifting between first and second, I noticed the
RPM's go up a couple hundred- actually the sound came to my attention
first then I started watching the tach. It kept up through all 5
gears. I attributed it to a cold engine. Unfortunately, it kept up
until well after the temp guage reached its' normal point at 210
degrees. My commute is about 47 miles and it only stopped after about
25 miles... The variance was only about 300 RPM's and it DID stop,
but I'm wondering if this an indicator of something out of adjustment
(high idle?) Gas is the same I've always used from the same station
if that makes a difference.

Any ideas? Words of wisdom greatly appreciated.

John

Re: Engine Racing While Shifting
 

I had an idle that was funny like that for a while, and when I checked the
Throttle Position Sensor (TPS) I found it had a dead spot. It was an easy
fix. This might be it, or might not as your Jeep is pretty new.
Troy
"John R" <john_r357@hotmail.com> wrote in message
news:77ac046e.0308060935.169ac72a@posting.google.c om...
> I was wondering if anyone has experienced this:
>
> Background First- This is a 2003 TJ Sport I-6, 21,000 miles on it
> (since Nov when I purchased it new). No modifications whatsoever-
> Bone Stock <sniff>
>
> Weather was a little cool this am, low 60's in northern VA.
>
> Leaving the driveway shifting between first and second, I noticed the
> RPM's go up a couple hundred- actually the sound came to my attention
> first then I started watching the tach. It kept up through all 5
> gears. I attributed it to a cold engine. Unfortunately, it kept up
> until well after the temp guage reached its' normal point at 210
> degrees. My commute is about 47 miles and it only stopped after about
> 25 miles... The variance was only about 300 RPM's and it DID stop,
> but I'm wondering if this an indicator of something out of adjustment
> (high idle?) Gas is the same I've always used from the same station
> if that makes a difference.
>
> Any ideas? Words of wisdom greatly appreciated.
>
> John

Re: Engine Racing While Shifting
 

I had the same problem with my 00 TJ 4.0L, it hasent happened again for
about a month, post a message of you find the problem!


--
o_o_o_o
/| ,[_____],
|¯¯¯L --O|||||||O-
()_)¯()_) ¯¯¯ )_)
"Jeep Guy" <jeep_guyNOSPAM@charter.net> wrote in message
news:vj3j7d5ugds74f@corp.supernews.com...
> I had an idle that was funny like that for a while, and when I checked the
> Throttle Position Sensor (TPS) I found it had a dead spot. It was an easy
> fix. This might be it, or might not as your Jeep is pretty new.
> Troy
> "John R" <john_r357@hotmail.com> wrote in message
> news:77ac046e.0308060935.169ac72a@posting.google.c om...
> > I was wondering if anyone has experienced this:
> >
> > Background First- This is a 2003 TJ Sport I-6, 21,000 miles on it
> > (since Nov when I purchased it new). No modifications whatsoever-
> > Bone Stock <sniff>
> >
> > Weather was a little cool this am, low 60's in northern VA.
> >
> > Leaving the driveway shifting between first and second, I noticed the
> > RPM's go up a couple hundred- actually the sound came to my attention
> > first then I started watching the tach. It kept up through all 5
> > gears. I attributed it to a cold engine. Unfortunately, it kept up
> > until well after the temp guage reached its' normal point at 210
> > degrees. My commute is about 47 miles and it only stopped after about
> > 25 miles... The variance was only about 300 RPM's and it DID stop,
> > but I'm wondering if this an indicator of something out of adjustment
> > (high idle?) Gas is the same I've always used from the same station
> > if that makes a difference.
> >
> > Any ideas? Words of wisdom greatly appreciated.
> >
> > John
>
>

Re: Engine Racing While Shifting
 

Is this the first time it has happened? I know GM had the rpms hanging
between shifts on their newer modles. They said it was so that it made the
shifting smoother.

--
Shawn


"There are two theories to arguing with women. Neither one works."
"Jeep Guy" <jeep_guyNOSPAM@charter.net> wrote in message
news:vj3j7d5ugds74f@corp.supernews.com...
> I had an idle that was funny like that for a while, and when I checked the
> Throttle Position Sensor (TPS) I found it had a dead spot. It was an easy
> fix. This might be it, or might not as your Jeep is pretty new.
> Troy
> "John R" <john_r357@hotmail.com> wrote in message
> news:77ac046e.0308060935.169ac72a@posting.google.c om...
> > I was wondering if anyone has experienced this:
> >
> > Background First- This is a 2003 TJ Sport I-6, 21,000 miles on it
> > (since Nov when I purchased it new). No modifications whatsoever-
> > Bone Stock <sniff>
> >
> > Weather was a little cool this am, low 60's in northern VA.
> >
> > Leaving the driveway shifting between first and second, I noticed the
> > RPM's go up a couple hundred- actually the sound came to my attention
> > first then I started watching the tach. It kept up through all 5
> > gears. I attributed it to a cold engine. Unfortunately, it kept up
> > until well after the temp guage reached its' normal point at 210
> > degrees. My commute is about 47 miles and it only stopped after about
> > 25 miles... The variance was only about 300 RPM's and it DID stop,
> > but I'm wondering if this an indicator of something out of adjustment
> > (high idle?) Gas is the same I've always used from the same station
> > if that makes a difference.
> >
> > Any ideas? Words of wisdom greatly appreciated.
> >
> > John
>
>

Re: Engine Racing While Shifting
 

"Shawn" <bluelinewall@shaw.ca> wrote in message news:<6_GYa.699173$Vi5.16077304@news1.calgary.shaw .ca>...
> Is this the first time it has happened? I know GM had the rpms hanging
> between shifts on their newer modles. They said it was so that it made the
> shifting smoother.
>
> --
> Shawn
>

Yes, it's the first time its' happened to this degree. It happens
only slightly when the engine is cold when I'm easing out of the
driveway first thing, and I attribute that to cold engine/high idle...
What I experienced the other day was unusual and isolated- it hasn't
happened since. The weirdest part was that it was extreme- 300 RPM's
doesn't sound like much but it seemed huge at the time escpecially
when the engine had come up to temp and it kept doing it...

As far as what GM does- nothing would surprise me. I wouldn't own a
GM product if one was given to me. But that's another topic.

I'm going to keep looking for answers. If I find one, I'll post it.

Thanks!

John