Weird Question? Dont know if it been asked before.
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I have a UUC VM3 Exhaust and when my car is sitting at idle, the car sounds like it has cams. is this only my s4? recently got the timing belt job done. car is running great. does any other s4 sound like its camming stock?
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If it does not idle shooth it could be the cams. Had an Olds that ran well but wouldn't idle right. It had a flat cam. It was a V8 and I thought it was running great, but I was wrong.
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" He's referring to like old muscle cars with an agressive cam, which makes them have that "lumpy" sounding idle.