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just read the paperwork again, and it was CO which was high not the CO2
So High CO and HC.
Car is running better now I have cleared the oil from the spark plug chambers and no new oil has appeared so I am hoping it was just that. Will blast it before MOT to see if that helps.
Just checked and they did not leave the figures with the paperwork
I did take ht leads of and in the chambers it was full of oil. Coupke of months ago i left the oil cap off so presume it filled then cleaned it and its running better now. Do u think that would have skewed emmissions?