Exhaust noise

[Ric Jacques]

Hi guys,

I had a busted coolant tank a while ago - it fried two coils (leaked onto them). She was misfiring like a ***** for a while but OK after replacement coils. I probably shouldn't have driven it with the misfire but at the time no choice......

However my rear muffler was shot I think due to the misfire pulsing exhaust gases (maybe was near end of its life anyhow), and the exhaust was sounding more like a 'wet fart'

So I replaced the rear muffler with a Flowmaster, still sounds like a wet fart - albeit now a loud one :happy175:

I have the engine management light still on - code says inefficient CAT. Any you guys found a bad cat making a rubbish exhaust note? Can I change out just one CAT or must I change both? Any tips to identify which one is bad??

Thanks for tips!

Cheers,
Ric

 

[CzarKJ]

Welcome welcome. What is the code? Cats are expensive so let's see if it is really that or a o2 sensor

 

[Ric Jacques]

Hi czar - cheers.

Code is 0430.

Only started after the misfiring episode.......honestly the exhaust note sounds horrible I hate it.

Ric

 

[LibertyTC]

Firstly you need to check the performance of the oxygen sensors using a scanner capable of reading live data to determine whats a really going on.
If you need any sensors replaced use NGK/NTK brand.
I would recommend you seek a professional with the appropriate knowledge & equipment to properly diagnose your P0430 situation.