exhaust cycles nonstop when warm!

[dirty-max]

My exhaust on my car changes tone over and over again when the car is warm and idling and at the same time when it does this my vacuum gauge drops a little bit like the car is trying to compensate the a/f mix or something..is this normal it's an auto btw

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[Trackaholic]

Could be the A/C cycling, or maybe the cooling fan cycling and changing the load on the alternator.

Other than that, no ideas.

-T

 

[dirty-max]

A/C is off and you can hear the fan kick on and off but the exhaust changes tone all the time and the fan only kicks on from time to time I'm trying not to make a big deal about if just wondering if it's normal

 

[Suddueth13]

The A/C compressor cycles on defrost and the floor settings at well, just an FYI.

 

[ManBearPig]

This post is super old and I found it while searching. My car does the same thing. OP...if you are still on the forums, did you ever resolve this?

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