VR6Joni 1 Posted April 10, 2010 Report Share Posted April 10, 2010 My mates VR6 is running rich and I haven't got a clue why, anyone got any ideas?What I've found:Using VAGCOM it seems that when temperature gets above 90degC it all goes wrong. I just will not trim fuel down to 1 on the lambda reading.It throws no fault codes other than 00537 - Oxygen Sensor Regulation.It's had a new lambda sensor.Clocks temperature matches ECU temp.When engine temperature is below 90degC it does seem to regulate occasionally and unplugging the MAF makes the engine cut out.However when above 90degC unplugging the MAF makes no difference! WTF.Someone please help as it's already failed one MOT! Link to post Share on other sites
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