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Thread: TD5 running on 4

  1. 6th June 2007, 07:46 AM #11
    Lionel's Avatar
    Lionel
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    Quote Originally Posted by StephenF10 View Post
    Tonight the TD5 developed a bad miss and lack of power. It sounds and
    feels as if one cylinder is out. I removed the acoustic cover but
    couldn't see anything amiss. After resting for an hour or so it
    started and idled normally, but after a stab on the accelerator pedal
    the miss was back. Any ideas?
    I had a misfire in my TD5 Defender. It was very intermittent at first, but when it was misbehaving, it felt very much like a petrol engine with a crook plug lead.

    In my case it turned out to be the throttle potentiometer, and was fixed successfully under warranty. If the harness plugs are clean, this is probably the likely cause. Check that the plug to the throttle pedal is secure, and that the wiring appears OK, but the potentiometer itself (in the throttle pedal assembly) might be faulty.

    An injector problem is less likely, but still a possibility.

    Cheers,

    Lionel
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  2. 6th June 2007, 12:50 PM #12
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    davros
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    other checks...

    What year is the motor? Mine was a 2000 model with the plastic head dowels. Blown cylinder head gasket led to a cracked head. The only indication of this was a slow loss of coolant. This did get worse as i left it for a while. Now and again it would start on 4 then go to five. The other thing you might try is looking for a leaking fuel regulator, this did affect mine. You would see diesel dripping from the drivers side of the block at the rear, right up near the firewall.
    Dave
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  3. 13th June 2007, 08:38 AM #13
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    StephenF10
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    Quote Originally Posted by StephenF10 View Post
    Tonight the TD5 developed a bad miss and lack of power. It sounds and
    feels as if one cylinder is out. I removed the acoustic cover but
    couldn't see anything amiss. After resting for an hour or so it
    started and idled normally, but after a stab on the accelerator pedal
    the miss was back. Any ideas?

    Stephen.

    2001 Discover TD5 auto.
    Fixed. No.4 injector wasn't firing. Injector tested ok (whew!) so injector loom
    was replaced. No sign of oil in the loom - maybe a broken wire?

    Stephen.
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  4. 13th June 2007, 12:57 PM #14
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    Lionel
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    Quote Originally Posted by StephenF10 View Post
    Fixed. No.4 injector wasn't firing. Injector tested ok (whew!) so injector loom
    was replaced. No sign of oil in the loom - maybe a broken wire?

    Stephen.
    That's GOOD news!

    Cheers,

    Lionel
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  5. 13th June 2007, 10:14 PM #15
    Shuffle Guest
    I had the same problem, which was caused by a loose connector to one of the injectors. Simple fix which has never recurred (touch wood)...
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