Iacv

[B16Z6+S20]

hi! can any1 tell me how to tune the IACV on my 94 civic ex, im having rough idle with the a/c on i cleaned the thing and cheked the hoses and still nothing, im not geting the check engine sign, but some times it works fine. and what is the litle pentagon screw on the side of it for? can the idle be adjusted there also ?

[superbluecivicsi]

vacuum leaks..

You only have a rough idle with the AC on?

[Shaguar47]

Mines the same way only mine is the EACV (but same thing). My car drops about .5k when I have my headlights on. It's really nerve racking

[B16Z6+S20]

Originally Posted by superbluecivicsi

vacuum leaks..

You only have a rough idle with the AC on?

yes, i cheked the hoses and dont have any leaks, and the idle get very low, like below 7000 but doesnt feel rough.

[honda_luvr_2000]

a low idle w/ the A/C on is actually a normal thing. It takes power for the engine to run the A/C that's y the RPMs drop. And I'm assuming you meant 700. My car idles at 600 and I don't have A/C or PS. As long as it isn't rough, then I really wouldn't worry

[bingisSD]

adjusting youre idle screw near the end of youre throttle cable is a sure way to bump youre idle up however much you wish. a low idle is not a real problem as long as is consistant and not erratic or fluttering. my idle flutters up and down which unless i have aftermarket cams is a significant problem. but having youre idle drop 200 rpm's is normal, its because y oure lil alternator only puts out oh say 70 amps and you have a small battery, when you turn off youre car youre lights dim too try hooking up a couple twelve inch competition subwoofers bumping it, while you have youre air conditioning on its the same way as youre rake pedal, pump it a few times and youre booster sucks up some power. power steering or windows as well.

but to 'tune' or rather adjust youre iacv you can just turn the little screw near the nifty contraption at the end of youre screw, it adjusts how open the little flap inside the intake manofold stays open.