Re: failed MOT because of emissions!
thanks for the reply
i have checked the reading and eveything but the CO is correct. the CO reading is 1.67 and thats really really high! i have noticed a drop in fuel economy but i just thought it was me getting less for my money at the petrol station
what can i expect it to be if the CO is that high??
The actual recorded figures are a great help to pin down the fault and eliminate others so always get them and put them in your posts
But if, say, the CO reading is way above 0.3 for 1st and 2nd idle test then, assuming air filter and sparks to be in good shape, the first step would be check out the pre cat O2 sensor. This leans off the fuel when the engine is in steady rpm -like idling or any steady speed state- so without that it'll be guessing and over fuelling in a big way. A sudden noticeable drop in fuel economy would also be a clue
thanks for the reply
i have checked the reading and eveything but the CO is correct. the CO reading is 1.67 and thats really really high! i have noticed a drop in fuel economy but i just thought it was me getting less for my money at the petrol station
what can i expect it to be if the CO is that high??