Another idle question - help!
Thread Starter
Intermediate
Joined: Aug 2002
Posts: 31
Likes: 0
From: N. Royalton Ohio
Another idle question - help!
I have a 90 L98 with an intermitent idle problem. Sometimes after starting the car it won't idle on it's own, it just starts and then stalls unless I keep my foot on the gas.
Sometimes it will get better after it warms up, but sometimes it gets worse. It seems like an electrical issue since sometimes when it won't idle, I turn off the key and restart it and then everything is fine. Other times it will start and idle fine, but if I shut it off quickly after starting then restart it before it has warmed up, it won't idle.
Could this be a bad IAC? I've already had the ECM replaced last year and it has new injectors too. Can the IAC be removed and cleaned or should it just be replaced?
Any help is appreciated
Sometimes it will get better after it warms up, but sometimes it gets worse. It seems like an electrical issue since sometimes when it won't idle, I turn off the key and restart it and then everything is fine. Other times it will start and idle fine, but if I shut it off quickly after starting then restart it before it has warmed up, it won't idle.
Could this be a bad IAC? I've already had the ECM replaced last year and it has new injectors too. Can the IAC be removed and cleaned or should it just be replaced?
Any help is appreciated
Le Mans Master
Joined: Feb 2006
Posts: 8,753
Likes: 9
From: Louisiana
Yes, the IAC would be first to check. Take the TB off and take the IAC out. Take care of the gasket unless you want to make a new one from gasket paper or buy a new IAC w/gasket, may also want to purchas a new TB gasket. Clean the TB and IAC with carb cleaner and a toothbrush or a small brush. When installing the IAC make sure the pintle tip is no further than 1 1/8" from the mounting flange or damage to the winding may occur. If the problem persist follow the minimal idle steps.
https://www.corvetteforum.com/techti...D=55&TopicID=2
https://www.corvetteforum.com/techti...D=55&TopicID=2
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
Originally Posted by Krawman
Thanks for the reply - I'll try the cleaning first. If that doesn't work I guess I'll just order a new IAC.
Originally Posted by ramjet319
i would check to make sure that your egr is plugged in!!! this is the exact problem i had on mine and it was the egr was disconnected?!
RACE ON!!!
