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Mot Failure On Emissions


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Hi, I have a 2002 Ford Fiesta Zetec and it has failed its MOT on the Offside Rear Exhaust emissions carbon monoxide content after 2nd fast idle excessive. The garage I took it to said they could not diagnose the problem and advised I book it into a Ford garage for diagnosis. In the meantime I thought I would try my local Kwik fit to which they carried out the following tests and could not resolve the problem:

1. Changed air filter

2. Fuel Treatment added

3. Lamda ( sensor 2 ) ( Rear ) changed: Reversed readings from CO high to Lamda high / CO low

4.Repaired broken pipe ( vacuum) from fuel rail

5. Refit clips to air filter housing and induction piping

6. Run OBD diagnostic ( no errors stored)

They have written on their report:

Vacuum noise coming from right hand connection of fuel rail. Maybe allowing excess air into return system

Any suggestions to what could be the direct problem before I put it into a Ford garage ?

Thank you


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i would not trust kwik fit to blow up a pushbike tyre never mind work on a car,did they use ford lambarda sensors as some other make are not up to the job, find a good independant garage to give the car a look over, it will be cheaper than fords.

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