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Discussion Starter · #1 · (Edited)
hi all ,test failed on co level at 4.63% max being 3.50% , hc level at287ppm max 1200ppm being fine but surly that would be higher if running correctly ,is this defo down to lambda sensor or can it be something else ,theres no way of changing the mixture ,i can say the car had a split air flow boot for how long i dont know but when a new boot was fitted this then made the engine idle irraticly so could the maf be dodgey any help would be great cheers;) also how much is a lambda sensor thanks
 

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What was the Lambda reading? and how old is the Lambda sensor? does it look original?

Also could you remember to add the vehicle details in the thread title next time as per forum rules please, they have been done for you this time. It makes it far easier for people looking up help for their own problems or conversions.
 

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Test your MAF in 2 ways;

1. Disconnect it (which is likely to put your EML light on) and drive the car, if t runs better then your current MAF is ropey.
2. Get the car on a live running data read out and see what values are shown over a period of running at different engine speeds.

How much is an 02 sensor - a direct OE replacement circa £50/60 from Eurocarparts/GSFCP. Its essential to get an OE one rather than universal or aftermarket as anything other than OE will be calibrated differently and therefore continue to pass values outisde OE specficiations to the ECU.

Also fouled injectors and worn seals can cause the 02 sensors fluctuate their reading requesting excess fuel from the ECU.
 
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