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View Full Version : Hissing noise proflo exhaust


Crocmania
12-20-2012, 01:36 AM
Is there anyway of stopping the hissing sound on a duramax at idle so it just has the nice v8 burble

UTAHFORD
12-20-2012, 05:53 PM
is it your turbo??? thats the only hissing i know of man

Crocmania
12-20-2012, 09:51 PM
I thought it was the turbo but its a very loud hiss it stops for about ten seconds every now and then at idle. It almost sounds like an exhaust brake is stuck on

UTAHFORD
12-28-2012, 12:14 AM
hmmmm i really dont know man that is weird

riyarobin
12-15-2013, 11:14 PM
Hissing sound indicates a crack in the exhaust manifold, exhaust pipe or a leaking gasket. A chugging noise could mean a blockage in the exhaust system.