i just installed a brand new pacesetter headers last sunday...started the engine and checked for leaks...so far so good..but there's this raspy, buzzy sound when you rev the engine :confused: ..then the following morning i started the engine and after 10 mins. of use, the check engine light comes on...i read somewhere that it must have benn caused by the burning oil & paint from the headers so i reset the ecu and it was gone...used it for a couple of miles... then minutes after my second start, there it is again!!! so what do you guys think?? should i replace my oxygen sensor?? or just keep resetting the damn ecu 'til it quits..TIA!!! :)

The buzzy sound is a leak. Check your ECU to see what code you're popping.

Tom

the check engine light is gone..i just reset the ecu..as for the buzzing sound, you can only hear it from the outside..doesn't really sound like a leak but m not really sure..i'll try to retighten the cat bolts tom.