idle problem when engine warms up

[fox182]

i have a 92 coupe that idles fine on a cold start for about 20 minutes until it completely warms up then all the sudden the idle falls slightly from 900 to around 600 and the idle sounds kinda weak, if i turn the ignition off and start it back up it idles normally again until a few minutes and it does it again, and also while driving when i push the clutch down to make a stop, the engine will almost stall then pics back u to idle, other than than it seems to run ok, its a 5speed with afr165s, trickflow trankheat intake and a comp cam, the fuel injectors are still 19lbs i gotta save more money for them,, not sure if that could be the problem,anyone have any ideas?

 

[HISSIN50]

Have you pulled codes yet? Pay attention to any idle-control/IAC codes. Are there any vacuum leaks?

 

[fox182]

i just replaced the computer which was fried, i havent pulled codes yet i checked the vacuum lines nothing seems to be wrong there,its almost as if something kicks on, or off and drops the ldle a bit

 

[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.