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Low Lamda in NCT

  • 20-05-2011 6:55pm
    #1
    Bombbastic22
    Registered Users, Registered Users 2 Posts: 336 ✭✭


    Hi,

    Just had NCT. Lamda was .91 where it should be between .97 and 1.03.

    What does that mean exactly?

    Cheers.


Comments

  • #2
    [Deleted User]
    Posts: 23,339 ✭✭✭✭ [Deleted User]


    NCT speak for a oner ;)



    :pac:


  • #3
    Ghost Train
    Registered Users, Registered Users 2 Posts: 30,472 ✭✭✭✭Ghost Train


    Bombbastic22 wrote: »
    Hi,

    Just had NCT. Lamda was .91 where it should be between .97 and 1.03.

    What does that mean exactly?

    Cheers.

    to do with the exhaust readings
    could be lambda sensor gone or leak in exhaust or something related (catalytic converter)
    http://en.wikipedia.org/wiki/Oxygen_sensor


  • #4
    Bombbastic22
    Registered Users, Registered Users 2 Posts: 336 ✭✭Bombbastic22


    RoverJames wrote: »
    NCT speak for a oner ;)



    :pac:

    a oner? What's that?


  • #5
    DonJose
    Registered Users, Registered Users 2 Posts: 3,470 ✭✭✭DonJose


    Bombbastic22 wrote: »
    a oner? What's that?

    €100 placed in the ashtray :)


  • #6
    Bombbastic22
    Registered Users, Registered Users 2 Posts: 336 ✭✭Bombbastic22


    DonJose wrote: »
    €100 placed in the ashtray :)

    hahahahaha.......... I thought 50 in the ash tray was supposed to swing it. In fact, I remember when it used to be 40. Know someone who did it and I saw the car flaked out in the middle of traffic a few days later. Pretty lousy that craic!


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  • #7
    AzureAuto
    Banned (with Prison Access) Posts: 233 ✭✭AzureAuto


    Your engine is probably running rich, or you've a vacuum leak somewhere. Check hoses and unions in engine bay for security and spray WD40 around any suspect areas and note any rise in engine revs while engine running.
    Alternatively lambda sensor could be fouled and not switching correctly. A diagnostic plug in would identify this fault.


  • #8
    Bombbastic22
    Registered Users, Registered Users 2 Posts: 336 ✭✭Bombbastic22


    AzureAuto wrote: »
    Your engine is probably running rich, or you've a vacuum leak somewhere. Check hoses and unions in engine bay for security and spray WD40 around any suspect areas and note any rise in engine revs while engine running.
    Alternatively lambda sensor could be fouled and not switching correctly. A diagnostic plug in would identify this fault.

    Well, replaced the sensor and all the emmissions dropped to normal levels and the car is driving smoothly now where it was previously hesitating a bit on acceleration.

    Lamda reading has gone a little high now and the mechanic says it's 50/50 whether it will pass on that one thing.

    When idling the rev counter moves and the engine huffs slightly........says it may just need a air flow meter as car idles perfect when the meter is unplugged. Says it's either that or the throttle body.....hmmm cars are a pain .......


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