bmxer10

Got an 01 with a vfr supercharger on it. The exhaust on it appears to be the stock exhaust up to the cat. After that there is a resonator welded in, then borla dual exhaust. The cars a bit loud which I can live with. But at higher rpm, 4k+ there is a rattling noise.

I have looked around the exhaust and cant find anything loose or badly fitted. Its a very fast rattling noise so I dont think its metal hitting metal. I read somewhere else that getting rid of the cat will help reduce this rattling (no inspections here).

Ideas?

Oscar

iTrader: (2)

detonation..

kjoudrey

iTrader: (1)

Have someone else drive it while you're in the passenger seat. Move around and see if you can figure out exactly where the noise is coming from. With the top down, something making noise in the front can sound like it's coming from the back, so it helps to be able to move around and find the source.

bmxer10

It sounds pretty close to this around the :20 mark

http://www.youtube.com/watch?v=V8w-AB6bfl8

fooger03

iTrader: (2)

grab an exhaust tip

shake mildly violently

does it hit anything?

grab other exhaust tip

repeat

chicksdigmiatas

iTrader: (11)

Mine was rattling around, a coat hanger later solved such a problem.

Vashthestampede

iTrader: (17)

Depending on what you have under there it could just be a heat shield that is coming loose, or the exhaust could be hitting somewhere.

Just jack the car up, crawl under it, and figure it out. Cant be all that hard.

Cryswht93N/A

heatshield rattling?

Der_Idiot

iTrader: (2)

1. Rubber mallet
2. Hit exhaust muchly
3. ?????
4. PROFIT!

seraph

iTrader: (4)

Just remove it all and run open header. Problem solved.

18psi

iTrader: (76)

stupid advice.


as for your question OP, the others are right: move the exhaust with your hand from the rear. the rubber bushings allow for enough movement for you to be able to tell if its hitting anything.

next check heat shield bolts/etc.



if all else fails get rid of that POS and go TURBO

eastZ14miata

hear a rattle? turn up your radio.

dustinb

Mine rattles from 3500-4000 but that's because the welds have broken on both sides of the resonator.

ismael_pt

iTrader: (1)

This ^^

rider384

iTrader: (3)

Better advice has never been given on this forum.