AndyD

TPS is fine. 0.5V at idle, 0.7V at 2000rpm. With throttle fully open it reads 5V. Don't even see anyway of 'adjusting' it.
Injectors now all cleaned and back in with new seals, New HT lead fitted to replace the fretted one and a bottle of petrol cleaner ready to put in and give a good thrash tomorrow.
Only noticeable differences in Pscan readings are "Long Term Trim" was 24µs now reads 0µs and "Purge Duty Cycle" was zero and now around 4% at 2500rpm.

An update from today in the garage.
I removed the fuel injectors and tested them with a jury-rig. One of them was passing fluid before it was energised so could have been causing the excess fuel. Gave them all a good clean through and they all now function correctly .
Noticed the HT lead from the coil to the distributor was a bit fretted so will get a new one and stick the injectors back in when I get new seals.
Will also look at how to reset the ECU back to factory.

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?!