Please help diagnose my emissions problem...Failed due to 6.3% CO, 145ppm HC and 0.843 Lambda.
Previous results were more like 0.2% CO and other values similarly low so there is clearly a problem.My cat warning light has been on, but would a failed cat make such high readings given that this car should be able to pass without a cat at all?
Could the cat warning light be caused by the O2 sensor failing?I am overdue for new plugs and dizzy cap/rotor so will be changing them in the next few days, I doubt they would cause these readings though.
..I have tested the voltage between E1 and Tf1 in the diag port and get 0.04v when cold, 2.5-3.5v when warm.
It was pitch black out when I did this and I'm not sure if it was fluctuating.Sometimes boost is limited to just over half but I had put this down to the low air temps lately
- performance otherwise seems fine. There are no fault codes stored.I am going to try to diagnose the O2 sensor using http://www.mr2.com/TEXT/MkII_O2_Sensor.html tomorrow.
I can't afford to go replacing bits that don't need doing so any further advice would be appreciated.
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