hanging idle

[89stang1]

i have to keep my idle set at 1000rpms or it stalls sometimes when im slowing down, idle hangs at 1400 rpms for a second or 2 before coming down to 1000rpms does anybody know the IAC gasket fix whats the procedure with cutting your own gasket any help

 

[$uperstang]

With your mods it is a good idle and it should hang right around there for a couple seconds before coming down. Don't touch it.

 

[jrichker]

See the "Surging Idle Checklist for help with all your idle/stall problems. Everything you need to find and fix idle problems is in there.

The first two posts contain all the updates to the fixes. At last count there were 24 possible causes and fixes for surging idle/stall problems. I continue to update it as more people post fixes or ask questions.