NA6 - Misfire, Poor idle, Rich, Black smoke.
Posted: Fri Jan 25, 2013 1:23 am
Hi there, Im not new but this is my first topic thread
I need opinions on a fault that I am experiencing with my NA6. It still has the B6 engine fitted in it which apart from a alloy radiator isn't modified. On cold start there is a misfire but once the engine has reached N.O.T the misfire disappears. If i let the car idle for a few minutes after driving or after a hot start the revs start to fluctuate and it blows black smoke from the exhaust with the throttle slightly depressed but then it clears up and returns back to normal. Also smells a tad on the rich side too..
The car has new leads and plugs. I'm thinking O2 sensor, MAF sensor or ISCV.
What do you think? Cheers.
Oh and it has a newish non genuine CTS fitted to it which I have doubts about.
I need opinions on a fault that I am experiencing with my NA6. It still has the B6 engine fitted in it which apart from a alloy radiator isn't modified. On cold start there is a misfire but once the engine has reached N.O.T the misfire disappears. If i let the car idle for a few minutes after driving or after a hot start the revs start to fluctuate and it blows black smoke from the exhaust with the throttle slightly depressed but then it clears up and returns back to normal. Also smells a tad on the rich side too..
The car has new leads and plugs. I'm thinking O2 sensor, MAF sensor or ISCV.
What do you think? Cheers.
Oh and it has a newish non genuine CTS fitted to it which I have doubts about.