Strange idle issue
Thread Starter
Pro
Joined: Jan 2002
Posts: 514
Likes: 0
From: Gaithersburg MD
Strange idle issue
For about the past two weeks I've been having an idle problem where when I come to a stop, the revs will dip to 500 for about 2-3 seconds, then rise back up to 750-800 (my normal idle). I've tried an idle relearn, but 25 miles through the process of letting the car relearn an idle, it started again. No other problems at all, no mods done for about the past 4-5 months so nothing I've done to it has caused it, as far as I can tell.
Ayone have any ideas??
Ayone have any ideas??
Instructor
Joined: Sep 2000
Posts: 147
Likes: 0
From: Erial NJ
Cruise-In VII Veteran
Re: Strange idle issue (TenaciousD)
Had a similar situation. Eventually the service engine soon light illuminated and set a code. The code was intake air temperature low (voltage high). Turns out that the wires to the intake air temperature (IAT) sensor were broken internally close to where they connect to the IAT sensor.
Burning Brakes
Joined: Aug 2000
Posts: 1,218
Likes: 1
From: MD
Re: Strange idle issue (TenaciousD)
Have you replaced the plugs and wires since you have had the car. My car was idling rough. Turns out the pucks on the plugs had burnt off making the gap out of spec. Replaced wires with MSD and got new NGK Iridium plugs.
Idle is very smooth and runs great.
:D
Idle is very smooth and runs great.
:D
Thread Starter
Pro
Joined: Jan 2002
Posts: 514
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From: Gaithersburg MD
Re: Strange idle issue (NassauBlue)
Interesting, I had that same problem about a year ago, I replaced a faulty connector to the IAT sensor since it was setting a code. I wonder if it's happening again, or the IAT sensor itself is going bad. Thanks for the info, I might check my original wire splice, see if it has a problem.
Burning Brakes
Joined: Aug 2000
Posts: 1,218
Likes: 1
From: MD
Re: Strange idle issue (Net Exploit)
I have headers on mine and one of the wires was almost burned through. That also was contributing to my issues. I think the original wires should be replaced with the MSD wires. They stand up better to heat and have far superior conductivity.
Hope all works out well.
:yesnod:
Hope all works out well.
:yesnod:
Thread Starter
Pro
Joined: Jan 2002
Posts: 514
Likes: 0
From: Gaithersburg MD
Re: Strange idle issue (Net Exploit)
Yeah, replaced the plugs and wires about 8 months ago, used the GM hot wires and the Tr55 plugs, I'd figure the plugs should still be ok?
I have headers as well, so I should check that too.. thanks :cheers:
[Modified by TenaciousD, 9:14 AM 8/11/2003]
I have headers as well, so I should check that too.. thanks :cheers:
[Modified by TenaciousD, 9:14 AM 8/11/2003]
