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continued. misfire , running rough and reduced power

Discussion in 'TD5' started by Kentishcolin, May 29, 2011.

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  1. Kentishcolin

    Kentishcolin New Member

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    still unsolved ...........

    Disco td5 auto 03 with misfire/ rough tickover and reduced power.

    Changed injector wiring loom as ecu plug showed the signs and also have run a new parallel loom from the engine plug to the ecu to rule out residue oil and later chaffing problems.
    Ecu inspected , no oil ingress
    Maf tested with multi meter , getting a circuit but showing some resistance ?
    although nothing noteable happened when i unplugged this whilst engine was running ?

    Can't seem to hear the fuel pump in the tank at all ? ............ have checked fuse, and relay making nicely, also tried to do a self bleed request (on the key and five dips on the gas pedal) heard nothing from the pump at all ? ................ should i be able to ?? and is it possible to drive it with half a tank and no primary pump running ??

    hope someone can help :confused:

    Col
     
  2. Shifty1962

    Shifty1962 Well-Known Member

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    The TD5 does not have an injection pump so if your pump is not running it will never start. You should be able to hear it running from outside the vehicle.
     
  3. Kentishcolin

    Kentishcolin New Member

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    Ok :) ........ i'm learning as we go along !! :)

    Have tried several times to hear it even on the self bleed operation .......... nothing !

    Might have to lift the carpet at the back to get to it properly.

    Could maf sensor give me this trouble ?

    Regards

    Col
     
  4. minidod

    minidod Active Member

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    Your MAF sensor has nothing to do with this problem, what you need is a new fuel pump as your's is fooked.

    If your still worried about the MAF after the engine is running disconnect it and see if it makes difference.
     
  5. Kentishcolin

    Kentishcolin New Member

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    right ! :) ................ have ordered a new fuel filter as that's a cheap item and it won't take much doing ......... thinking along the lines of do that first before ordering big bits £££.
    Motor has only done 60k and i've had it 5 yrs now ........... i don't think the fuel filter has been changed ! so i may well have myself to blame for all this !!
     
  6. MTurri

    MTurri Active Member

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    Fuel pump or fuel pressure regulator (possibly "and" instead of "or").
     
  7. Shifty1962

    Shifty1962 Well-Known Member

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    Fuel pump suction filter mesh may be blocked but I'd expect to hear the pump running.
    Only way to tell is to take the pump out and have a look.
     
  8. 50 pence

    50 pence New Member

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    Right on time for the fuel pump to fail !.

    My car still ran when the pump packed up. ( no power and really lumpy ).

    Deffo pump related. ( as has been said ! ).

    Del.
     
  9. Kentishcolin

    Kentishcolin New Member

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    hi guys,

    Thanks for the posts.
    I'm sad to say my fuel pump passed away today as i parked on the drive ................. at least i know what the problem is now as some of you rightly suggested.

    Thank you for the advice ............ pump change this weekend ! ...... any tips ??

    col.
     
  10. Clanforbes

    Clanforbes New Member

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    I'd be checking the relay before I changed the pump - I found the contacts on mine (defender) to be crusty with carbon - it wasn't the cause of my problems, but it didn't help.
     
  11. Kentishcolin

    Kentishcolin New Member

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    hi,

    already checked the relay .......... it's defo the pump.

    All back on the road now with a new pump :)
     
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