Had a new OEM exhaust fitted back in April after the old one rotted away, noticed the other day that it had started to blow a bit. Took it back to the garage that fitted it and they said it needed a bit of welding and done it under warranty as its only a few months old.
I thought it would be the end of it but its now sounding a little odd, not blowing again but definitely doesn't sound right - I know its idles a little rough anyway but almost seems to exaggerate the noise and also smells like its running really rich (both on first start up and after a 150 mile journey last night).
My thoughts are they've either just completely bodged it as its was a warranty job and they're not making any pennies or they've tw*tted the lambda sensor thingy making it run rich.
Anyone got any other ideas what it could be so I can go shout out them and make it look like I at least half know what I'm talking about.