So. Ive done a lot of recent repairs myself.. Im 19 years old, and in the machine industry, now learning about my 4 cyclinder 2.2L. New water pump, timing belt, all new belts.. New radiator, radiator hoses, and a few other hoses causing vaccum leaks. So After all this was done i decided to do a few idle adjustments, because my idle was always off. At around 1100-1200rpm. So i decided to first adjust my FIT Valve. I saw a video where a guy tightened the valve clockwise until it was shut. I did this and it cause the rpm to go wayyy down, until i found out that the correct setting is tighten, then loosen 1/8th turn. So i did that. My rpm was still off around 1000, so i tried messing with the idle adjustment screw. I found out it was bottomed out. Okay so i let it be. I had just changed belts, and figured it was okay for now. About a week later, my rpms started getting stuck at 2000RPM. It would settle down when stopped at 1500rpm, but would always go back to 2000rpm when shifting gears, and the clutch was in.. Im now doing steps to clean out FITV IACV and TB, but dows anyone know what else this could be cause from?? Some one give me something!!! Stuck throttle cable? umm idk. I know the FIT only adjusts idle when car is cold. So this couldnt have cause problem?? HELLLPPPP!!

 

This video helped me with my idle problem.
Maybe it'll help you too.
Good luck.
www.ericthecarguy.com

http://www.youtube.com/watch?v=L788j...layer_embedded

 

i had the same prob, i changed all the hoses, checked the coolant and everything i ended up changing the intake manifold and throttle body and it all went away

 

okay thanks for the video... ive actually checked this one out, and ive bled the cooling system because i changed the radiator. (more than once to be sure) and ive checked all the said valves in this video. they all seem to be completely functional, i took them apart to be sure. So what next? vaccuum leak huh? ive changed a few hoses that leaked, and cant seem to hear any other leaks. Loss of words* idk

 

I had a similar problem with my accord. i changed out the IACV twice and i bled the cooling system various times and nothing. It turned out to be a air leak between the IT and cyl head. I check it with the IACV disconnected and a can of carb cleaner. I sprayed the carb cleaner around the gasket and there was a idle spike between cyl 3 and 4. Changed the gaskets (doubled it up) and never had a problem since. Worth checking out.

 

a vacuum leak between the IT? and cyclinder head? It? INTAKE MANIFOLD?

 

Air leak due to a faulty intake manifold gasket. Felpro sells them in a kit with the Intake plenum gasket. I doubled up on mine cause it's a pain in the butt to change.