doggsy964

Morning fellow 964 fanatics , I own a 90 cab c2 , entering the motorway yesterday was in second and took her to 6000rpm then into 3rd , after 3 miles on motorway could hear a clatter when gas pressed which then was replaced to a vibration flapping noise which at first sounds like a hole in exhaust , but I feel the noise to be under the rearseat footwells, it got more pronounced as I applied more gas, didn't feel like loss of power, and got home fine , bloody worried now , I had noticed she's been runnin a bit hotter last week, not sure if this makes any sense , thanks for listening , it's like having an injured child , 964 will only make you stronger!!!!!!!!!

Laker

my guess: Cat. converter. First give a feel for exhaust leaks where it connects in-line, then check to make sure any/all heat shields are tight, then give it a few light taps to listen for anything rattling around.

doggsy964

Amazing isn't it , here I am in the English countryside sitting in my kitchen looking out to the driveway with squirrels all running around my 964 , after posting my car ailment , within 5 mins a 964 bro in Philly at half four in the am , extends his heart and wisdom , back across the pond,,, brilliant , I'm gonna get out there now start her up and if nothing else wake the wife up,,,,,, ha what an alarm tone. Thanks man I'll let you know. Doggsy964

Crystal Cranks

If you have a primary bypass you may have blown a hole in your secondary muffler. It will be hard to see as they usually go on the side that is up against the engine.