Civic_95_Si

Wed. I got a new intake manifold and throttle body installed. I knew that replacing the T/B may lead to idle problems...BINGO! So it happens. 1st day I get it back she idles high 2000-2500RPM, once as high as 2900RPM. So I take it back to the shop and he adjusts a screw on the throttle body. OK cool, on the cold starts its idles about 800rpm with a little sputter on very cold starts, BUT once driving around it goes back to idle about 1500-2000.
If the screw is loosened any more the car won't start, if its tightend the idle will go up. Not really asking for advice...just ranting...

ek9mugen

thats sucks what parts did you replace them with?

spoon_ek9

i think you should check if there is any vac. leak.

smnowell

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Civic_95_Si &raquo;</TD></TR><TR><TD CLASS="quote">Wed. I got a new intake manifold and throttle body installed. I knew that replacing the T/B may lead to idle problems...BINGO! So it happens. 1st day I get it back she idles high 2000-2500RPM, once as high as 2900RPM. So I take it back to the shop and he adjusts a screw on the throttle body. OK cool, on the cold starts its idles about 800rpm with a little sputter on very cold starts, BUT once driving around it goes back to idle about 1500-2000.
If the screw is loosened any more the car won't start, if its tightend the idle will go up. Not really asking for advice...just ranting... </TD></TR></TABLE>

Isn't it the other way around? If the idle adjustment screw it turned clockwise (tight) then the idle goes lower. If it is turned counterclockwise (loose), then the idle will go up...I would definately check for vac. leaks. That is usually the number one problem when installing intake manifolds and poor idles afterwards. I am willing to bet the person that installed your manifold did not scrape all the old intake manifold gasket off the head. That WILL give you problems such as vacuum leaks and idle issues, I speak from experience...

Civic_95_Si

The throttle body is a 62mm BBK and itsa Skunk2 intake manifold. I don't think the person who did the work would 1/2 *** it and not scrape the remaining gasket off the manifold. He replaced it with a new one. I'm not sure which way he screwed/unscrewed. I could be wrong on the way I stated it.

NonovUrbizniz

It sounds to me like a problem with the IACV or the FITV.

when it cold starts it should be at higher rpm and then once it warms up it should go down...

Sounds like the guy is mis-adjusting it or doing it while it's cold.

Shawn C

iTrader: (1)

well, high idles can come from a bad IACV seal, a bad IM gasket seal, a bad TB seal, or several other vacum spots around the IM. just get some starter fluid spray and spray around the IM while it's running. if it idles all crazy when you spray around a certain area, you have found your leak. you'll get it, don't worry, you just have to pinpoint it first. good luck