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Thread: Non responsive accelerator pedal on start up

  1. 11th November 2013, 03:09 PM #1
    twr7cx
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    Question Non responsive accelerator pedal on start up

    Twice now I have started my TD5 D2a and when I pushed down the accelerator pedal to take off, the vehicle went nowhere. There was no response of change. After 30 seconds it suddenly worked as normal.

    I assume it's an issue with the electrics given the nature of the accelerator pedal in the D2's. Any ideas on diagnosing?
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  2. 11th November 2013, 03:27 PM #2
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    Barefoot Dave
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    G'day Mate.
    Test it again with the AC off and see what it does.
    Cheers, BDave.
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  3. 11th November 2013, 09:43 PM #3
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    budgie
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    have you check the MAF (this sounds like what happens when the MAF is disconnected)
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  4. 17th November 2013, 08:50 PM #4
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    coops71
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    This sounds like the symptoms I had when I disconnected my MAF to see if the MAP was faulty. The MAP is a micromechanosensor and I'm guessing mine was getting sticky. I replaced my MAP and found a lot of my glitchy throttle symptoms went away.
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  5. 18th November 2013, 05:54 AM #5
    twr7cx
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    My MAF is new within the last six months. It's a genuine Land Rover unit and I'm fairly certain that it has no issues as I have done some data logging using the Nanocom to ensure the tune is correct with all the other modifications.
    I have driven around for a while with the MAF disconnected and I don't recall experiencing a non-responsive accelerator pedal.

    I haven't checked the MAP though.

    This issue actually hasn't occurred again since I made this thread.
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  6. 18th November 2013, 10:40 AM #6
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    OffTrack
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    Quote Originally Posted by twr7cx View Post
    I have driven around for a while with the MAF disconnected and I don't recall experiencing a non-responsive accelerator pedal.
    You would't.

    The ECU uses the MAF for air mass calculation unless it gives a reading outside of a prescribed range, then the ECU falls back to MAP/IAT. If you unplug the MAF and the throttle is unresponsive then the MAP/IAT is most likely stuffed.

    cheers
    Paul
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