I have a 2000 civic si my car throws a cel for Idle air control. I just put a new iacv on still get the cel. I figure it is a vac leak but will a vac leak make it throw a code. I can not find a leak anywhere. What else can i do.

 

Did you reset the ecu since you replaced the IACV?

 

Yes i reset the ecu the car ran fine for a bout an hour then the light comes on.