HI, I need your help.
My 2004 TF has failed its MOT on emissions and I don't know how to get it to pass. I've tried a few things, and I'm rapidly getting to the point its just not worth spending more money on.
The emissions readings gave the following:
CO: 0.000%
HC: 1.4 ppm
Lambda: 1.345
I first tried an Italian tuneup and drive it hard for 30 mins and dropped it off straight into the MOT bay for retest. However, no luck.
The failure is on the Lambda. A scan with Pscan showed an electrical issue with the post cat oxygen sensor. This was replaced by a garage and the code is now gone, but the lambda hasn't come down.
The garage can't find "any obvious issues", and only recommend "sending the car to an ECU specialist".
Any thoughts?