rough idle w/ AC

[etlsport]

this has been going on for some time now, didnt see anything about it posted..

when i have the AC on, the VX runs a little noiser and definitely rougher, the whole car has a rumble to it. if i turn the ac off it will continue until i drive maybe 1/4 mile then it idles smooth as silk..

anyone seen this or know what to do about it? i rarely use my AC anyway, but it is annoying.

ive cleaned the IAC a couple of times, my next step i think is the TPS and EGR (which ive cleaned a few times) since im over 100k anyway

[tom4bren]

Does it do it with the defroster too?

[etlsport]

anytime the AC compressor is on. with the fan blowing and no air conditioner its fine

[tom4bren]

The part that's confusing me is that it continues for a while after you turn off the AC. Does the idle kick up when you turn the AC on? Is there any delay between when you turn the AC on & the rough idle starts?

[etlsport]

Yes it is more or less instant when I switch it on except when the engine is cold. When I switch it off it gets better but doesn't go away until I've driven a block or two. No notable jump in rpm

[tom4bren]

IIRC there's supposed to be a circuit to bump up your idle when the AC is on.

I'm clueless right now but I'll be thinking about it on my commute home tonight.

[Luna X]

ya might have to try the 'ol baby powder trick to see if you can spot any vacumn or intake leaks...