1992 corvette idle
Melting Slicks
Joined: Oct 2016
Posts: 2,024
Likes: 363
From: Central Alabama
I suggest you get an ALDL cable and download Tuner pro RT. Chasing an idle problem when you don't know what's going on with the ECM can become futile.
With tunerpro RT you will be able to see what the ECM want's idle to be (commanded) and actual. You will also see the IACV steps, engine temp and all the other things the ECM uses to make the car idle properly.
Also before you go overboard cleaning a throttle body read the warning in the 92 FSM about cleaning throttle bodies. The plates should have a circle of black DAG coating. Some people mistake this for carbon and remove it. That in turn creates excessive air flow and raises idle. If you don't have a FSM get one.
With tunerpro RT you will be able to see what the ECM want's idle to be (commanded) and actual. You will also see the IACV steps, engine temp and all the other things the ECM uses to make the car idle properly.
Also before you go overboard cleaning a throttle body read the warning in the 92 FSM about cleaning throttle bodies. The plates should have a circle of black DAG coating. Some people mistake this for carbon and remove it. That in turn creates excessive air flow and raises idle. If you don't have a FSM get one.
