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Originally Posted by tennisfreak
Not sure but I think the cat may be failing in my stock front pipe.
Just in the last couple of days I have noticed that when the engine is above 5000 rpm the exhaust makes and odd sound (almost like there is some kind of small leak).
Yesterday at idle it almost sounded like something was rattling around slightly. I parked my car in the garage and left it idling and the noise did not go away. I turned off the AC and started looking under the hood and did not hear or notice anything. Then went under the car and heard every now and then what sounded like a clinking noise.
I felt around the front pipe mid pipe connection and did not feel any exhaust leak.
I am wondering if the leak is so small that it only can be noticed under lots of pressure (when I am flooring it and the engine is above 5000rpm)?
Right now I just dont know because I am new to this stuff and not an expert. All I know is I installed my Perrin catback back in April and never noticed a thing until a few days ago. Now when I push the car and rev her up it sounds like a small exhaust leak is somewhere and I swear it sounds like something is rattling around. The noise seems to be coming from the front half of the car. Cant tell if it is directly underneath me or up more towards the engine.
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I'd recommend you have a friend/gf/wife drive the car around while you sit outside listening. Also have them rev while parked, and try to determine what area of the car the noise is coming from.
Report back with results, and I'll do my best to help you diagnose.