Absolutryde

I have a CLS6 and everytime I have the AC on, then press in the clutch while slowing down the RPMs seem to dip very low (about 4-500 and back to normal). It only does is when I run the AC and never has stalled. Could it possibly be the IACV I hear everyone talk about being dirty or faulty?

civicdrivr

iTrader: (9)

It could be slightly dirty. Does it do that when the AC is off?

Absolutryde

The only time I've seen the problem is with the AC on. Possibly a bad compressor?

civicdrivr

iTrader: (9)

Doubt its the compressor.

If you turn the steering wheel at idle, does the idle drop too?

Its been awhile since I drove with the a/c on at idle, so it may be normal.

MurdaZ

iTrader: (1)

well when the a/c clutch is engaged its drawing more load so it should dip for a moment, but not sure if it should be at 4-500 rpm

womey

iTrader: (3)

My car does the same thing, so you're not alone. Doesnt bother me too much, the car is always a little funky when returning to idle anyway.

Absolutryde

Thanks for the replys... I don't use the AC too much either, just started to get a lil hot in the northeast. Only problem is it gets on my nerves while driving in traffic, feeling like it wants to conk out every time I push the clutch in. Maybe ill start taking the scenic route home w the windows open.

PANAMARED

i believe what compensates engine speed when a/c is turned on is activated by a vacuum hose... do you see any loose hose by throttle body? hear any hissing sound? does it idle a bit up and down if a/c not engaged?

Absolutryde

Other than when the AC is on, it idles and drives absolutely perfect. The only thing I thought it MIGHT be is there is more drag on the motor with the AC, right? So, maybe before I push the clutch in it is used to the extra RPMs and killing that extra power may drag it down. I don't know maybe Im just making excuses for it now.

civicdrivr

iTrader: (9)

It could just be the parasitic drag on the motor. It could also be the pressure switch, but since the RPMs rebound to normal, I doubt it.

silvervtec96

Mine has done this for a few years now, can't say it really bugs me cause it hasn't ever stalled out.