the car is 95 civic d16z6. the problem is it revs up and down constantly. ive replaced iac tps fast idle bled the coolant system. NO vacuum leaks. it was fine until i wanted to clean my throttle body so i sprayed tb cleaner inside that and in my intake manifolds, right after i started it up thats when it started to rev up and down all day what did i do?! please help. btw everytime i touch the gas pedal it jerks and when i let off the gas pedal it jerks again.

 

There is a thingy (not sure the name) under your intake manifold, its got two coolant lines going to it, u have to remove it and tighten the disc that has a spring on the other side, Usually thats the culprit. scissors usually work the best to tighten it.
hopefully someone else can explain it better than me. Just did it to mne and it fixed the problem.

 

search "idle surge" someone will have it explained better on there.

 

thanks for the replys. im not sure but i think your talking about the fast idle valve? idk but ill repost it idle surge thanks again!

 

The thingy with the two coolant lines goin to it is the IACV, and the other thingy your talkin about is the FITV that has to be adjusted.

 

how do i fix the coolant lines or "adjust" them

 

Haha thank you, I can do it if the car is in front of me but explain it? Not so much....

 

do you think they are clogged?

 

your not fixing the lines you are removing them to pull the IACV off, remember its located under the throttle body.

 

take out icv an clean it out with carb cleaner.

 

Na what you want to do is take off the IACV and clean it with brake/carb cleaner, like spray that **** all over and in it. At the same time on the underside of the throttle body you want to take off the plate and adjust the FITV.

Take off the intake and just inside the throttle body is a small 1/2inch hole, that leads to the FITV. When the engine is cold you should feel air being sucked threw tha hole. Go start your car and stick your finger over that hole and see if the idle calms down any.

 

i had a brand new 230 dollar iacv on it today it did not solve my problem i now have 3 iacv. haha

 

how sure are you that there are no vacuum leaks? how did you check?

 

now your gonna think it IS a vac leak, because i put my hand over the tb it did not choke out....the rpms barely dropped. but there is no air getting sucked in from anywhere, and it happened right after i sprayed tb cleaner into the throttle body so how could it be a vac leak!?

 

sounds like a leak to me



no air that you can hear...spray some carb cleaner everywhere around the intake manifold and listen for the rpms rising



coincidence

 

how will i hear the rpms go up if its constantly revving up and down

 

when you find a leak they will go higher up than the high part of the current up and down. and might stop fluctuating depending on how big of a leak you have.

 

Did you check your tps or map sensors?

 

yes replaced them both

 

Spray carb/brake cleaner all over the throttle body/intake manifold when running. Thier might be a gasket leak thier.

 

just did that today nothing happened.