new4ucivic

Im having trouble with my civic. When i start it it jumps up to about 2200 rpms. After it warms up a little the rpms jump up and down from 2500 to 1000 while idling. Now ive replaced the throttle body and sensor with a new one. Tried looking for a vacuum leak didnt see anything. And im at a loss for words. if anyone has any idea what this could be let me know id appreciate it.

jdmchickx

i had the same problem for weeks. everyone told me to check for vacuum leaks and clean iacv and throttle body. i did all that, didn't change a thing. take your FITV apart completely and tighten the plastic **** inside of it. the looser it is the higher your rpms are going to be, and the tighter the lower your rpms will be. the vibration of my car loosens it so i often have to take it apart and tighten it

new4ucivic

Ok heres a dumb question. What is a FITV and where is it located?

jdmchickx

fast idle thermo valve its under the throttle body

new4ucivic

But if i replaced the throttle body already shouldnt i have gotten some sort of different reaction?

eghatch77

I had the same problem a few weeks ago also I took my IACV off and sprayed it out with carb cleaner then let it dry for about 20 mins hooked it back up still the same problem. So I was like I'll deal with it another day well the longer I drove it the better the idle is so maybe you should give it a try just don't lose the o ring.

new4ucivic

hmmmm maybe ill give it a try. it just drives me crazy when its idle.