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TD5 won't rev over 3000rpm

Discussion in 'Land Rover Discovery' started by Gary24, Jul 28, 2014.

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  1. Gary24

    Gary24 Member

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    Hi guys
    Just hooked the caravan off after being away and was crusing down the road and noticed my Discovery won't rev over 3000rpm. There is no sudden shutdown at 3000rpm just no more go. She seems to be driving ok in the lower normal driving range( around town). Anyone any thoughts of where I could start.
    Cheers Gary
     
  2. sierrafery

    sierrafery Well-Known Member

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    Hi, start with the simple things: new quality fuel and air filters, clean the MAP sensor, unplug the MAF and drive it so...if it goes better with MAF unplugged you need a new MAF or leave it unplugged, is it manual or auto...EGR or not... what year, etc...describe better the car
     
  3. Gary24

    Gary24 Member

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    Hi
    Sorry for lack of info. Its a 2002 manual Discovery TD5 and EGR is blanked. Fuel filter was replaced as I had a problem with fuel pump so I replaced it. I'll try another new filter as a starting point. Was talking to a Landy mechanic briefly and managed to prise out some info. He said he would start with undoing the exhaust incase cat is blocked.
     
  4. DaveDisco2

    DaveDisco2 Active Member

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    Turbo wastegate actuator is very common.
     
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  5. Gary24

    Gary24 Member

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    Thanks Dave. I'll have a look in the morning. Just changed fuel filter and the bugger won't start. Normally not a problem but typical after the day I've had. Tried the bleeding procedure and battery is flat now. On charge overnight. What do I look for in the wastegate.
     
  6. sierrafery

    sierrafery Well-Known Member

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    now knowing it has a CAT that seems a big chance to be cloogged
     
  7. Disco DJ

    Disco DJ Active Member

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    I had that. I now top the fuel filter up with diesel before screwing it on, seems to work.
     
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  8. DaveDisco2

    DaveDisco2 Active Member

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    You want it to move freely in and out with a pair of mole grips.
     
  9. Gary24

    Gary24 Member

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    Think its the fuel pump in tank. After replacing fuel filter can't get car to start. Checked fuel filter after preforming bleeding procedure and the filter is still empty.
     
  10. Disco DJ

    Disco DJ Active Member

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    Try it. Fill it with diesel "manually", screw it on and try again. Nothing to lose!!
     
  11. johnlad

    johnlad Well-Known Member

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    even if he fills the filter with fuel, without the pump running the td5 wont start, it needs a steady 4 bar of pressure to perform
     
  12. Gary24

    Gary24 Member

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    Just to update. I replaced the fuel pump and all the above problems are sorted. Landy is back to running like a sweety. Cheers all
     
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  13. steveyorks

    steveyorks Well-Known Member

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    At last someone who asks for advice and then takes the trouble to give us the outcome! thanks for updating us mate.
     
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  14. Gary24

    Gary24 Member

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    Well here I am again, back to square one with Landy not revving again. Went for a full week after replacing the pump. When I was waiting on my new pump to arrive I had battery out to charge. Silly question but could leaving car with no battery in it have cleared something. Think I need to check a few things here like wastegate ,maf etc
    Gary
     
  15. GDM

    GDM Active Member

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    Check the waste-gate is free, it only takes a few minutes and will cost you nothing.

    Get some grips on it, squirt the rod with Duck Oil/Plus Gas and move it backwards and forwards a good few times. Our TD5 had this a few years ago and it seemed to hit a brick wall at just under 3000 RPM because the turbo was over-boosting and the ECU was cutting the fuel. It has done it once more since.
     
  16. johnlad

    johnlad Well-Known Member

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    you could try replacing the boost modulator there pretty cheap and can give symptoms like yours
     
  17. Gary24

    Gary24 Member

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    Will try those few things. Changing the fuel pump and it working for a week must have been a strange coincidence.
     
  18. GDM

    GDM Active Member

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    Had exactly the same thing. Fuel pump failed it worked for a while, then the waste-gate got stuck. I did replace the boost modulator first but it made no difference.
     
  19. Gary24

    Gary24 Member

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    So tonight I tried the wastegate with vice grips. It seemed to be ok. Then I took the red plug off ecu and it was covered with oil. Cleaned it all out but still the same.
    GDM did you get yours sorted?? Going to order modulator next
     
  20. sierrafery

    sierrafery Well-Known Member

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    cleaning the oil at the ECU plug is = almost ZERO... it means the injector loom is gone and the solenoids dont get proper feed anymore... replace the loom asap otherwise you may do everything else in vain
     
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