I changed my oil/filter yesterday, and never drove the car at all, no other changes. When I drove my car today, my idle goes from 800-1500 RPM's constantly once warm. This leads me to believe it's the IACV as there have been no vaccum leaks. Can the IACV go bad overnight & casue this w/ no other symptoms? the car drives fine.

The car:
94 Hatch (DX) w/ JBM D15B VTEC.

TIA

 

did you throw a cel or is it just surgeing? Cause my car dose this (d16z6) when ever the car gets warmed up. i dnt have any cels.

 

no CEL, just the surging idle, and the car runs great other than this.

 

Yea same with me. Just take it off and clean it with some carb cleaner. There is a screen that sometimes gets clogged. Work for me. Also when bolting it back on make sure it is on real good cause i cleaned it like 2 times and then it still did it sometimes but i just unbolted it and then put it back on and now it is fine.

 

It's a pretty quick fix, correct? meaning removal & reinstillation of the IACV is pretty quick & painless?

 

yeah its easy, like to 14mm bolts or somthing and 2 hoses to disconect i had to do this, i think i may have to do it agian, becasue my car is ideling wierd again.