3000 rpm idle won't go away
Thread Starter
Senior Member
Joined: Sep 2009
Posts: 516
Likes: 1
From: Downers Grove, IL
Car: 91 Z28 / 04 GTO
Engine: GMPP 350 TPI / LS1
Transmission: WC T5 / T56
Axle/Gears: 3.23 / 3.46
3000 rpm idle won't go away
Here's the break down. The car is a 91 Z28 with an L98 swap. Right now the car will not idle lower than 2500-3000 rpm and I'm hesitant to 'let it warm up' at such a high range. The only code I pulled was for CTS low. IAC and TPS were just replaced and I didn't find any vacuum leaks. I have open shorty headers until I can make the car drivable enough to get the exhaust hung. Any help is appreciated.
Thread Starter
Senior Member
Joined: Sep 2009
Posts: 516
Likes: 1
From: Downers Grove, IL
Car: 91 Z28 / 04 GTO
Engine: GMPP 350 TPI / LS1
Transmission: WC T5 / T56
Axle/Gears: 3.23 / 3.46
Re: 3000 rpm idle won't go away
can I get an under hood picture of all the vacuum lines
Thread Starter
Senior Member
Joined: Sep 2009
Posts: 516
Likes: 1
From: Downers Grove, IL
Car: 91 Z28 / 04 GTO
Engine: GMPP 350 TPI / LS1
Transmission: WC T5 / T56
Axle/Gears: 3.23 / 3.46
Re: 3000 rpm idle won't go away
checked ALL vacuum lines and now the idle dropped to 2500. I noticed I don't have a charcoal canister and the CTS needs to be replaced. Can those two things make my car run so poorly?
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