ltante

I have 94 civic coupe with a d16z6, it's automatic, when Im driving and I am coming to a stop.. as my RPMs are coming down to about 900, they will start jumping up and down from like 900 to 1500 constantly, and I am able to hear the engine revving itself... and it will do this until I come to a complete stop... what could be the problem? I changed out my IACV already.. but its stilll doing it... please help if you can thanks

ltante

any ideas???

Civicfanatic_09

Vacuum leak, low on coolant, Fit valve out of adjustment, have you checked these things? Was the IACV you replaced it with new, used?

ltante

well i haven't messed around with the FITV.. would cleaning it help?
and the IACV wasn't new but i got it off of a friend and it worked fine...
also what's the best way to check for vacuum leaks?

Civicfanatic_09

You can spray carb cleaner around your intake and vacuum lines, and if you do have one you will notice a change in the engine pitch, can't remember if it idles up or down. Sometimes you can here a vacuum leak. I cleaned my fitv before when my car did that and it helped it, they tend to unscrew themselves.

ltante

ok ill give it a try and you've had this problem before?

Civicfanatic_09

Yeah I had a problem with my b16 doing that.

ltante

ok thanks cuz it just starting doing that out of the no-where