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Do I need a new MAF?

  • 13-03-2010 11:51pm
    #1
    jamieh
    Registered Users, Registered Users 2 Posts: 2,073 ✭✭✭


    Hi all,

    I have a 320Cd - 2005.

    The engine light comes on in the dash every so often. It might stay on for a few hours and then re appear after a few hours.

    A mechanic told me that the MAF needs to be replaced. I brought it to an auto-electrician who ran a diagnostic on it but there were no faults relating to the MAF.

    I don't want to spend the money on replacing the MAF until I'm sure that it needs to be replaced.

    How do I know for sure?


Comments

  • #2
    Fishtits
    Closed Accounts Posts: 1,382 ✭✭✭Fishtits


    Unplug it and see if you notice an improvement.

    Methinks the poor old MAF is instantly binned far too easily these days...


  • #3
    jamieh
    Registered Users, Registered Users 2 Posts: 2,073 ✭✭✭jamieh


    Hey,

    What kind of improvement should I notice? MPG, torque?

    Will I do any damage by unplugging it?


  • #4
    Digitaljunkie
    Registered Users, Registered Users 2 Posts: 349 ✭✭Digitaljunkie


    Most of the time a failing Maf won't produce dtc's (fault codes). It can take a long time for a maf to completely fail usually added by slowly reduced power over time. A maf test is easy if you know how to use your diagnostics properly most don't. If a maf has completely failed its easy to test manually simply by un-plugging it. If the car seems more powerful with it plugged out then its toast. Sounds like you need a proper diagnostic technician to check it over. Although this test only works if completely failed. A diagnostic test showing below 80% in g/s per bhp of the car will tell if its on the way out.


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