AndyD

Trying to get my 1998 MGF through the emissions test is driving me nuts - The dreaded High CO.Initially I fitted a new Cat (Bought from the MG owners club) and a new O2 sensor from fleabay.CO level was still high so I invested in a PSCAN to see what was goin on - turns out the O2 sensor just wasn't working (stuck in open loop) so I purchased another from a more 'reputable' source. PSCAN now tells me that the O2 sensor is working and the car now operating in closed loop.however the O2 readings are still too high (around 0.8 where before they were even higher).Guy at the garage says the other readings don't indicate an exhaust leak, just the car is running too rich.I've attached 2 screen shots of the PSCAN data (at idle and 2200 rpm).Help - why is the car running rich?!