Cadillac CTS-V - Extra vibration when ac is on
05-19-2012, 10:27 PM
recently noticed that when I turn the ac on I at times feel extra car vibration/funky idling since I had the cam installed... Is this normal???
05-20-2012, 10:05 AM
The A/C compressor puts extra load on the engine... what you're feeling could be normal... If you can turn your A/C compressor clutch by hand with the engine off to see how much resistance there is... should be fairly easy to turn with some resistance
05-20-2012, 03:36 PM
how big is your came?
05-20-2012, 04:23 PM
its a 227/233 @113 so a midrange cam
What motor mounts do you have?
05-20-2012, 09:02 PM
^^ good point
05-20-2012, 11:13 PM
they are stock mounts. I replaced the drivers side about two months ago and have the passengers sitting around in my car...havent gotten around to it
05-21-2012, 02:39 AM
I believe there is another table that needs to be adjusted in the tune for when the a/c is on. I know my car would idle funky for a few minutes after i turned the a/c on but it eventually corrected itself.
05-21-2012, 03:10 AM
My car idles the same with the a/c on as it does when its off and my cam is quite a bit bigger than yours. Im running UMI solid mounts so I feel more vibration in general but the fact that the motor stays nice and planted is well worth it.
I dont know if they did something special when it was tuned so i could run the a/c without any changes at idle or not.
05-21-2012, 08:59 AM
thanks guys I appreciate the input I will give my tuner a ring
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