Uppipe up pipe up-pipe
Question about a chirp sound, rattle sound, cant figure what it is sound.
Ok, I gutted and installed an uppipe. I'm feel aquainted more with the underside of the car than the drivers seat now.
In the process, I had to remove the midpipe/downpipe. 60k on this exhaust. Broke the bolts that connect that mid to cat pipe where the donut is. The donut was not in good shape, in fact, it was splitting at the edge. Found some bolts, washers, buttoned it up on reinstall. I cant feel any air around it, besides, it burns when its hot... OUCH!
When I let off the gas, I hear a fluttering chirp sound. Its not always there, just when I press and release under load. I hear a rattle, but I'm pretty sure its exhaust shield related. Would a donut cause this flutter/chirp sound? Is that the wastegate? What the heck is it? Car is running great. I just put redline 75w90ns in the case today, 75w90 in the rear diff, and mobil 1 in the engine. WOW (of course the sound was there before I did the fluid exchange but let me tell you, it really is a world of difference with that beautiful gold fluid in there).
So do you thinks I'm hear'n a leak when the exhaust vibrates or is this a normal sound after you remove that tiny cat. Sitting idle, its pretty quiet. I cant hear air rushing through a hole, even when I put my head under the car when its running. Any suggestions, tips, pointers? I'm a worry-aholic.
I'm pretty sure I buttoned all of the exhaust up well when I did the uppipe. It almost sounds like its coming from under the car but its really hard to tell.