when i warmup my 04 coupe in the mornings (or whenever the engine is cold) i hear this high pitched rattling sound coming from the exhaust that goes away after like 10 seconds, sounds like little pebbles bouncing everywhere. Please help! thanks

 

Aftermarket or OEM? Front or rear of car?

 

Could be a CAT. Also, could be a loose heat shield - the startup vibrations may get it going, and once the car settles, it goes away.

Also, it may be something internal - check your oil level - perhaps there's a valve or something making noise, and until oil pressure picks up, it's making the noise.

Rick

 

its stock and coming from the rear

 

hmmm...if it's exhaust related, it could be a flange or a bad hanger/exhaust fell out of the hanger, maybe a heat shield still. Not a clutch I guess...you could have a cat breaking up and once the exhaust pressure get going and heater a little, it quiets down???

How does it run, ok? Gas mileage ok still? How long has it been doing this?

Rick

 

anyone install a ssv plenum from kinetix

 

Yep...and thanks for your post and thread-jack!

 

yea.. that was totally random LOL