ok i got a problem, last night i decided its time to clean my intake manifold and my intake vavles so i went out and got a can of intake manifold cleaner, and used it, it stopped the white smoke from coming out and seemed to make the engine response a lil lil lil bit better. anyway, after i did that i noticed that my idle speed was at 2k and holding, so i decided to try and adjust it. i turned on my car, unpluged the IACV and attempted to screw in the trottle screw to lower the idle speed, the lowest i could get it was 1.5k, the screw is all the way in, also when i plug back in the IACV it raises it to 1.7k-2.5k anywhere inbetween but its steady it doesnt flex. i dont know how else to lower my idle. it should be around 600-800rpm. Please help ASAP

 

Bump.
Yep it should be right there - 600/800 rpm's.
Something is telling your computer that it needs to give the engine more fuel it sounds like...

 

any idea's on how to fix it, i commute 84miles a day 5 days a week and i need the gas milege and the idle will help alot

 

you checked all vaccum leaks etc? cleaned IACV? Made sure the FIAV is screwed in?

 

2 weeks ago i replaced all vacume lines in the engine bay, dont know how to clean the IACV and what is FIAV is it the screw near the map sensor cause if it is yes

 

to clean the IACV, just take it off and spray brake cleaner on the screen and make sure its clean. The FIAV, is the fast idle air valve, and its the small thing bolted to the bottom of the throttle body with the coolant lines going to it. Take it off, and pull the end cap off, it should have a big plastic nut, sometimes this nut comes unscrewed. screw it back on.

Check out page 172 on the civic helms manual located in the online resources link in this forum

 

ok i will try that asap prob tuesday after work.... will the FIAV make your idle stay about 1500rpm, my idle is steady but it stays high

 

I'm not sure.. but what it does is has a wax in it, and as the coolant warms up and flows through it, the wax melts and lets it close or open or do whatever it does, therefore lowering the idle to a warm idle instead of a cold idle. It's a possibility

 

my car did the same thing once i cleaned the IACV problem was fixed

 

yea i cleaned out my IACV really good today and it really didnt do anything, the idle is still high i will check that plastic nut on tuesday and see whats up about it, and i guess go from there