VERY weird noise - any ideas?!

[Guy]

Got another fault with my car fwn. Just lately it's felt a bit down in power when I accelerate. As the throttle opens, a loud noise that sounds like a spinning mop flapping against a pipe comes from the exhaust and it feels short of power. If I back off the throttle, the noise stops and the power surges back.

Also, I've noticed a distinctly weird smell in the car, especially when it's cold - it smells like a mix of benylin and a sort of petrolly burning smell.

It could be the fibre glass escaping inside the exhaust (it's a custom stainless) but I've shone a torch up it's bum with a mate revving the engine and all looks normal.

Any ideas :down: ?

 

[frank]

maybe the cat guy ? we used to bang the underneath with a gloved hand to listen for a rattle

 

[funkydoodycool]

Certainly sounds like the lining coming loose from a silencer or more likely the cat. My Primera made all kinds of weird floppy clangy nasty noises when the cat started to fail, followed by a failure to go past 2,000rpm when it finally collapsed inside itself.

 

[Guy]

Good point that chaps. It was misfiring for 5,500 miles with the duff injector so it's probably ingested alot of unburnt fuel grr.

 

[Bombardier]

Cat is my guess.