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96 GP shakes when AC is on


Brodizzle83
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Does anyone else's Grand Prix or 1gen W have this issue? Feels like I have subwoofers in my car when at a stop light.

 

Sent from my SM-G955U using Tapatalk

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Last weekend I recharged the A/C in my 1995 after a couple years of not using the A/C.  I was happy that it still works, but it does increase the idle speed by at least 200 rpm.  Like yours, it now makes a bad vibration sound at idle, and the vibration also causes an annoying buzz in my dash somewhere. 

Everything smooths out above 1500rpm once I start driving, it's just noisy at idle.   

It's bad enough that my 9-year-old son asked me yesterday "dad what's that weird sound?" at the first red light.   

 

My motor mounts are probably pretty bad after 231k miles, I'm getting a little "clunk" when shifting out of Park.   

Edited by oldmangrimes
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I would have to see what my idle is at. It shakes a little when the AC is off too, but not as bad. I'm now guessing the engine mounts are toast.

 

Sent from my SM-G955U using Tapatalk

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