I have posted this before - No Response

[genz11]

I have a 94 3.4L camaro

When i rev the engine (not driving) .. just still I notice that it coughs back at me after i get to a decent RPM.. usually over 2k rpm.. I have had ppl that work on cars tell me its normal.. but i still know theres a reason for it and I want to fix it.. i want a clean rev. Does anyone know what causes the engine to cough up on the way back down from the rev? It dosen't affect performance.. just gets annoying..

[hockeyman]

<blockquote>quote:</font><hr>Originally posted by genz11:
I have a 94 3.4L camaro

When i rev the engine (not driving) .. just still I notice that it coughs back at me after i get to a decent RPM.. usually over 2k rpm.. I have had ppl that work on cars tell me its normal.. but i still know theres a reason for it and I want to fix it.. i want a clean rev. Does anyone know what causes the engine to cough up on the way back down from the rev? It dosen't affect performance.. just gets annoying..<hr></blockquote>

Try changing the muffler.

-Marc

[key2emptiness]

Yeah what he said. You might have some pressure built up in there.

[genz11]

ive already put in a flowmaster exhaust and a new catylitic converter.. none of those helped.. it still does the same thing..