Minimum Idle set for ‘85-‘91
Thread Starter
Drifting
Joined: Aug 2002
Posts: 1,775
Likes: 125
From: Birmingham AL
Minimum Idle set for ‘85-‘91
I recently did this again on my ‘89. Some idle issues after sitting for a few years during grad school. I feel like the blades are too far open and when starting, rpm’s are high for a moment. Idle is a tick high at 8-900 rpm’s. Followed FSM procedure which included disconnecting EST for timing advance. That really made this a struggle. I don’t recall doing that previously with this procedure that is all over the forum. Question:
Should the EST be disconnected for the minimum idle set procedure? Was this revised at some point?
Should the EST be disconnected for the minimum idle set procedure? Was this revised at some point?
Drifting
Joined: Jul 2022
Posts: 1,809
Likes: 365
From: Central Florida
This is what I have. I believe it was from this forum. It worked on mine but mine was not idling wrong. I did this after replacing the IAC and manifold gaskets. It does disconnect the EST timing connector.
Don't forget to turn the car off before going for a test drive because the ECM will not automatically re-establish the advance timing. The below file is windows notepad, let me know if you need the text pasted into the thread.
Here is the thread it was in. https://www.corvetteforum.com/forums...dle-speed.html
.
Don't forget to turn the car off before going for a test drive because the ECM will not automatically re-establish the advance timing. The below file is windows notepad, let me know if you need the text pasted into the thread.
Here is the thread it was in. https://www.corvetteforum.com/forums...dle-speed.html
.
Last edited by Vets-Vet; Sep 21, 2023 at 09:00 AM.
