AC Clutch Disengaging while Coming to a Stop
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Instructor
Joined: Feb 2011
Posts: 140
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From: Houston Texas
AC Clutch Disengaging while Coming to a Stop
I have a very odd issue going on with my ac compressor
(beware of long story)
Last month I had an LS6 installed in my 01 (auto) coupe. It has a light performance cam in it. By light I mean I'm still using my factory torque converter though I'm right at the edge of needing one with a higher stall.
When I'm driving down the road and am coming to a stop...right when I come to a stop my RPMs drop to about 800-850 (the idle speed is set at 900rpm). This is turn causes my ac clutch to disengage which subsequently is causing the belt to come off by 1 groove. I can hear a loud clicking sound from the engine bay plus I notice the orange light on my ac control panel goes dark. All my belts and pulleys are brand new. Some have even been changed just for experimentation.
About 1-2 seconds after this occurs my rpm's will pick back up to 900 where they should be, the ac clutch re-engages, the control panel light illuminates and all is normal.
What could be the cause of this phenomenon? The only thing that I know *could* possibly be the root cause is a vacuum leak but I have extensively checked for this. The only possible source could be the MAP sensor being slightly loose as we reused my LS6 intake off my old engine.
Sorry for the 500 page novel but I just wanted to be as detailed as possible
Any comments or suggestions are welcome!
(beware of long story)
Last month I had an LS6 installed in my 01 (auto) coupe. It has a light performance cam in it. By light I mean I'm still using my factory torque converter though I'm right at the edge of needing one with a higher stall.
When I'm driving down the road and am coming to a stop...right when I come to a stop my RPMs drop to about 800-850 (the idle speed is set at 900rpm). This is turn causes my ac clutch to disengage which subsequently is causing the belt to come off by 1 groove. I can hear a loud clicking sound from the engine bay plus I notice the orange light on my ac control panel goes dark. All my belts and pulleys are brand new. Some have even been changed just for experimentation.
About 1-2 seconds after this occurs my rpm's will pick back up to 900 where they should be, the ac clutch re-engages, the control panel light illuminates and all is normal.
What could be the cause of this phenomenon? The only thing that I know *could* possibly be the root cause is a vacuum leak but I have extensively checked for this. The only possible source could be the MAP sensor being slightly loose as we reused my LS6 intake off my old engine.
Sorry for the 500 page novel but I just wanted to be as detailed as possible
Any comments or suggestions are welcome!
