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Ford Mondeo NCT Emissions FAIL

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  • 22-07-2007 2:59pm
    #1
    zapata
    Registered Users Posts: 895 ✭✭✭


    How do all.
    My 1999, 1.6 petrol, black top engine, mondeo failed CO emissions.
    Results

    Engine/Oil Temperature 82 celcius

    Low idle CO 0.05 vol%
    (700 rpm) HC 0 ppm

    High idle Lambda: 0.985
    (3130 rpm) CO 0.38 vol% above 0.3 % fail
    HC 120 ppm

    Any ideas lads on a solution?


Comments

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    #2
    JHMEG
    Closed Accounts Posts: 7,686 ✭✭✭JHMEG


    Hi CO usually means the cat is gone.


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    #3
    Mr.Diagnostic
    Registered Users Posts: 937 ✭✭✭Mr.Diagnostic


    JHMEG wrote:
    Hi CO usually means the cat is gone.

    Not true, high CO usually means that the engine is running rich, ie. there is too much fuel in the fuel/air mixture. it can also be caused by an inefficent Cat.

    In this case the normal Lambda combined with the slightly high CO and HC could indicate a Cat problem. The difficulty here is that the NCT fail sheet does not show enough info to allow a good diagnosis.


  • Options
    #4
    zapata
    Registered Users Posts: 895 ✭✭✭zapata


    Is it safe to say that the o2 sensor\lambda is working ok?
    Or could it be sending wrong info to ECU causing rich running issues.
    I might remove it for inspection. (Non serviceable part)


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    #5
    JHMEG
    Closed Accounts Posts: 7,686 ✭✭✭JHMEG


    Mr.Diagnostic wrote:
    Not true, high CO
    Ok, in reverse: A busted cat will, among other things, allow too much CO out the tailpipe.


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    #6
    Mr.Diagnostic
    Registered Users Posts: 937 ✭✭✭Mr.Diagnostic


    zapata wrote:
    Is it safe to say that the o2 sensor\lambda is working ok?
    Or could it be sending wrong info to ECU causing rich running issues.
    I might remove it for inspection. (Non serviceable part)

    There is not enough data to say that for certain but it is likely. If I had to put a % on it I would say its about 95% sure.

    Lambda readings from a gas Analyser and the Lambda/O2 Sensor are not directly related.


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