Idle problem at startup

[JimC]

When I start my car in the morning sometimes it won't idle. After I rev the engine to stop it from stalling, about 5-10 seconds, it idles perfect. No other idle issues. Doesn't do it all the time, just sometime when it has been sitting over night. Any ideas?

 

[scalder]

Try cleaning the IAC and see if that doesn't fix the problem..

 

[Stang|ess]

Search will yield a lot of answers, which I can't remember.

The ones I can are:
Iac
Vacuum lines
Maf?

 

[1LowGT]

+1 iac

 

[billfisher]

look for a small vacuum leak. the reason it does better after a few secinds is the engines mixture requirement get into line with the too lean mixture. whe warmer the leaner it can idle and be smooth. very small leak will do that.

 

[COramprat]

Check IAC too...new one is about 40 if you want to replace.