Try this so we can eliminate some things. Remove the serp belt and start the engine to see if the noise goes away. Only run it a few seconds, just enough to see if the noise is gone.
Also, take a rubber mallet and tap on the exhaust system to make sure the inside of the catalytic converter isn't loose.
Let me know what you find.
Wednesday, August 14th, 2013 AT 8:44 PM