Idle problems

[Johnz826]

It is good to get out there and try to figure shit out on your own, thats what i do and when im stumped, i jump on here. Its amazing how many people overlook the fact that if your idle screw magically backs out enough and sets the base idle to high, it will surge like this. This is EXACTLY what happened to me, cost me a IM/TB setup before i figured it out. My car idled good at 1/2 turn out from all the way in, and from the engine vibration my idle screw would back itself out several turns and begin to surge. Check that... And ofcourse vacuum leeks, when i bolted down my FR/U strut bar i pinched my PCV hose and cut it in half, that cased terrible idle surging... Sometimes its the simple stuff.

Can u post a pic of where this screw is located? A buddy of mine is haveing same issues and he turned to me for help.

[4thgentuner]

I am dumb founded here, my idle has been screwy(1000-2500 jumps) for a while and I just put on a fresh iacv and iatv. It fixed it a little bit but not all the way now it's only about a 250-400rpm change. My question is what else can cause this?

when u say fresh iatv (fitv right?)

did u buy it new or a used one, cuz chk make
sure the yellow ring is all the way tight,
u know, take the 2 screws on top off and tightin it all the way
that fixed my idle bounce...

[93F22A6]

when u say fresh iatv (fitv right?)

did u buy it new or a used one, cuz chk make
sure the yellow ring is all the way tight,
u know, take the 2 screws on top off and tightin it all the way
that fixed my idle bounce...

Way ahead of you man, I hardly ever post something like this unless I'm completely dumb founded and have gone through as many things I could think of on the top of my head.

[19dabeast85]

What have you done to check if the air boost valve is causing a vacuum leak.

Also, did you reset the ecu and re-adjusted your base idle when replacing the iacv?