[Shotimes] Surging at idle

[Steve Weinrich]

Clean or replace the IAB (ISC) valve).  About 55 bucks at AutoZone.

Steve

----- Original Message -----
From: "Christian Kesselring" <ckesselring@sisna.com>
To: "Shotimes" <shotimes@autox.team.net>
Sent: Friday, October 25, 2002 5:29 PM
Subject: [Shotimes] Surging at idle


> Car did something interesting today at lunch.  I noticed a strange noise
> while cruising, but thought nothing of it since I had the climate control
on
> auto and it could have been the heater engaging and disengaging.  Then I
> noticed that whenever the car was in neutral, i.e. at a stoplight or
> cruising to a stop, the rmp's would climb to ~2k for 1-3 seconds, than
> settle back down to ~900.  It seemed to coincide with coming to a stop, so
I
> thought it was something to do with that function that raises the rpm's in
> neutral at speed to facilitate shifting into gear.  But, when I parked the
> car I waited for a minute and observed that the surge ocurred at ~10sec
> intervals the entire time.  Then, after lunch, I got back in, started up,
> and it failed to repeat the strange behavior.  I have noticed that
seemingly
> since the weather turned cold, the car has had a little more of an
unsteady
> idle, but it has only ranged from 800 - 1100 rpm.  Hmmm...I will have to
see
> if it surfaces again, but what could cause this?  All I saw in my previous
> digests was a suggestion to check the ISC(Idle Speed Control) or something
> like that.  Please help.
>
> Christian Kesselring
> '92 SHO 119k
> '02 PT Cruiser 9k
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