That's what my '92 does! Drives me nuts!!........and it's worse since I put in
the SBEC chip.
No way to fix this huh?
"psychonaut"
Jeff Lee wrote:
> Comments below...
>
> Valcich, Robert HSD wrote:
> >
> > 1. Fluctuating Idle speed
> >
> > When I de-clutch and let off the gas to coast, the engine decreases in RPM
> > until it hits about 800 - 900 RPM (slightly higher than at stand-still, but
> > normal). As a I continue coasting though, the idle rpm starts fluctuating
> > up and down. It really gets bad as I pass through the 45 - 35 mph range,
> > where the idle speed bounces between 400 - 900 RPM. This can also occur
> > when I am doing close quarter maneuvers and am not going very fast, but am
> > constantly de-clutching. I have never seen this behavior before in a
> > standard. I took it to the dealer, but they can't find anything wrong with
> > it - all of the components are working fine, so they didn't do anything.
> > Does this sound normal to anyone else? The RPM fluctuations are driving me
> > nuts, because it can so bad that I get to stalling the engine when the RPM
> > is around 400 and I engage the clutch. The fluctuation do eventually stop
> > when I come to a stand-still and return to a normal idle of about 700 rpm.
> >
>
> My 98 5.2 5spd idle fluctuates the same way. I noticed it the first time
> I drove home from the dealer. Doesn't seem to have caused any problems
> in the last year - the auto trans guys don't have this problem.
>
> How about exhaust rumble/sputter/popping during engine braking
> situations, have you noticed that one yet, or have they improved that
> 'feature' with the 99's. Another problem that the auto-trans folks don't
> experience.
>
> Here is a response that I got when I posted a similar idle fluctuation
> question over a year ago...
>
> am14@chrysler.com wrote:
> >
> > The computer has a mechanism that senses movement (distance sensor),
> > and a throttle position sensor, that tells it where the throttle is.
> > It is confused when coasting with the clutch in or the transmission in
> > neutral. Can't handle it correctly. Will always be erratic until
> > wheels stop turning(at least nearly dead stop, if not dead stop).
> >
>
> jeff
> 98 RC 5.2 5spd
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