had new cat fitted but is noisy

[jason1987]

the guy said it will be raspy until its coked up a bit, ive prob done 200 miles now, does it just need longer to bed in? also should i be worried that i needed a new cat? did something cause it to break? i have a dump valve now, and when i come off the throttle the revs go up and then back down a little, im guessing cos the maf is confused because the air is dumping?

[TRAVIS BICKLE]

What dump valve do you have?

[jason1987]

baileys DV24, and car has done 120k so the cat prob just wore out naturally? just worried about reading things about why the cat broke, and when i had it fitted the guy said it was running very hot, but then the other tyre guy said well yh it will do til the new cats fitted.

[TRAVIS BICKLE]

Have you got the original recirc valve to try? your new cat may be flowing more freely that the old one, so maybe you can hear the turbo more than you could before? or it may be a lower quality cat and the exhaust flow through it is causing the noise?
I had a bailey valve on mine but put a recirculaing valve back on as it didnt run right. plus the mrs moaned about it sounding like a sports car and looking like an old mans car

[jason1987]

yh ill try the standard one, and the sound is a rattly sound, like when in the drive thru you can hear it, maybe just needs to coke up like the guy said?

[TRAVIS BICKLE]

never heard of a cat needing to coke up

[jason1987]

dunno then, ill give it a few more miles then go back to exhaust place

[lozz]

if its a cheap brand cat
they can be noisy itl quieten after a while once it gets filled with soot,

[jason1987]

dunno if was cheap one or not, was £160 fitted from an exhaust place

[rwb]

MIOW MIOW MIOW

Is it on heat?

never heard of a cat needing to coke up

My cat is a complete crack whore when its on heat.

(Noisy cat.)

(Sorry, I'll shut up now.)

[jason1987]

ill give it a few more hundred miles to soot up and if its still like it ill take it back