Before I submit the car for it's first MOT with VEMS I thought I'd see what the emissions were. In the UK, emissions control is no longer a "free retest" item, so I'd prefer it to be correct!!

Results of natural idle test

||Lambda: 1.002 - target 0.97 to 1.03 - Pass.

||Hydrocarbons: 550ppm - target <200ppm - Fail. I'm not sure why yet.

||CO||1.1% - target 0.3% - Fail. No cats in the exhaust this time, so was expected!

If you can explain the HC reading it would be nice - maybe they all do that - I have no emissions test results for the original ECU without cats.

All-in-all, a good result as putting the cats in will mean the car will easily meet the MOT requirements for emissions.

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