I have been having some engine problem, my rpm needle would at times drop at idle from 900 revolutions to the point where i thought it would just stall but it doesn't. I also noticed that every time i would put it in first gear and let go of the clutch slowly, that is with out accelerating, the rpm needle would just drop instantly to about 300 i would then quickly accelerate but rpm needle wont rise quickly as it should. Some have said it might be a vacuum leak, others are saying to check the iac/isc valve. I dont know really where to start looking, any feedback would greatly be appreciated. By the way i have 420a 2.0L engine. also, I check the spark plugs that i had recently replace, and noticed that one or 2 plugs had oil on them, i doubt the plugs are causing the problem. Thanks in advance.

Might want to start in the correct forum :P

Moved

You should check out your IAC. Its either behind the throttle body or behind your intake pipe, can't remember exactly which one.