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Lost power suddenly, now will not even start TD5

Discussion in 'Defender 90 / 110 / 130' started by northernbobber, Jul 3, 2018.

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  1. northernbobber

    northernbobber Member

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    2002 Td5 HCPU. came down the highway and suddenly lost power. It felt for some time like driving an N/A. It was still rolling ok at 80km/h and thought I'll make it home which I did. When I came to a stop I noticed rough idle and when I shut down the engine to get my nanocom, i could not start the engine again. Starter cranking but no start.

    The nanocom gives me 10.6 mil lamp drive open load (logged) and 10.7 glow plug lamp drive open load (logged).

    After power loss I noticed a lot of power loss in slight uphills but even ground I could sometimes feel like turbo giving in a slight push and the loosing it again.

    What could I be looking at here?

    I have bypassed AGR, I have bypassed mid silencer. New injector harness. all sensors cleaned a while ago. looked thru the hoses and all were attached or wastegate busted but since it's not even starting now I am thinking electronic issue.

    EDIT: I went out to check the red plug which I thoroughly cleaned some time ago. No oil there. My fuel pump has been kind of loud i think since i got the car 7000km ago, but i cannot hear any new sounds in that. still will not start, cranks but no promise.
     
    Last edited: Jul 3, 2018
  2. Togo

    Togo Member

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    I'm no mechanic so take this with a pinch of salt. I noticed a whine from the back of mine when running. A couple of mornings it has been reluctant to start - turning over but won't fire. On switching the ignition on (before final turn) the whining noise is quite evident. My garage tells me it is the fuel pump - apparently they get noisy before they fail. It does eventually start but has stuttered a couple of times. About to replace the pump. Have you got a noise from the back before trying to fire it up? Could your problem be the same - a simple case of fuel starvation? Sorry if I'm talking out the back of my head. It's just a thought as the symptoms sound similar and you mentioned the pump being noisy.
     
  3. northernbobber

    northernbobber Member

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    I am actually thinking the same as you. I bought this ride 7K km ago. have worked on it and got it running real sweet. The pump has always had the same noise, but then again I dont know how a td5 pump should sound. But I feel it's a bit noisy. i should maybe try the purge mode and see if I get the engine to even start that way. I know the previous owner has changed the pump once, but to what? not OEM I think. And I have had huge issues with non genuine parts lately with my series3 109.
     
  4. Togo

    Togo Member

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    There is a good thread in the technical section on replacing the fuel pump without having to drop everything at the rear end. I've just bought a marine hatch and will be fitting this so that I can get to the tank for maintenance in the future.
     
  5. northernbobber

    northernbobber Member

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    I have HCPU which I think will force me to drop the mother load
     
  6. neilly

    neilly Well-Known Member

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    If you can, check fuel pressure and flow at the fpr.

    Also it might be worth trying a new crank position sensor. Try borrowing one off of q mate.
    Cheers
     
  7. northernbobber

    northernbobber Member

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    Yeah, that would be good. Have to try to get the ride to the garage where we wrench where all is possible. thats why thought if I could just get it to run but otherwise it's a tow job.
     
  8. northernbobber

    northernbobber Member

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    I purged the fuel system. I can hear hiss from the reg. no gurgling or so. I finally got it started by cranking until it started. plugged the nanocom in and took it for a short spin. I can get the turbo only up to 0.2bar and the wastegate mod shown 0.00%.
     
  9. johnlad

    johnlad Well-Known Member

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    If it’s a defender they don’t have wastegate modulator fitted, Discovery has wastegate modulator
     
  10. Kev12

    Kev12 Active Member

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    You haven't mentioned if you did fuel filter yet
     
  11. northernbobber

    northernbobber Member

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    I have made a pretty thotough go thru whn I received the truck. So I changed the fuel filter not too long ago. Also I replaced the valve by the fuel filter that caused a hard to start symptom since it was shut and problem was solved back then. The loss of power problem occured pretty suddenly.

    I have ordered new silicone turbo hoses and a VDO siemens fuel pump.

    I also started to wonder if I could have blocked something by using fuel system cleaning agent. First a complete cleaning by STP and then Red Line you add to every tank a little. It cured my smoke puffs at idle. But could enough durt have come loose and blocked injection or somn'? I went thru the injectors with nanocom testing they all click equally.
     
  12. neilly

    neilly Well-Known Member

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    So you have not checked fuel pressure or flow volume at the fpr?

    cheers
     
  13. northernbobber

    northernbobber Member

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    I havn't had possibilities to do that where Im parked now. Will next week take it to the garage and start tinkering. Also thought of checking the wastegate valve in case that has started to get sticky. What would the symptoms on that be?
     
  14. Kwakerman

    Kwakerman Well-Known Member

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    Don't know the TD5 that well but a turbo/wastegate issue won't give you poor starting
     
  15. v8landyman

    v8landyman Active Member

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    When you fit your new pump start putting mineral 2-stroke oil in the tank when you fill up. About 500 ml per full tank and about 300 ml for a top up. Modern low sulfur diesel doesn't have the lubricating properties of older fuels and the 2 stroke adds this back for the pump and the rest of the fuel system also benefits. The mineral 2-stroke burns cleanly without adding extra smoke.

    Before replacing the pump check the gauze filter which could be blocked.
     
  16. northernbobber

    northernbobber Member

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    Thanks for the tips. Today i started the car to take it to the garage, after running purge mode since it would not start otherwise. for 5 minutes it ran great, turbo pulling stong easily to 70mph before i lost the power again and towed it to the garage. When i tried to start it at the garage, would not start again, so the pump seem to me as option nr 1 at the moment. I am still waiting for the parts but meanwhile we might have an old pump we an try it out with.
     
  17. northernbobber

    northernbobber Member

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    UPDATE: I replaced the fuel pump, blew with air thru all the lines, replaced filter and and valve. Opened the regulator, cleaned it and the gauze and replaced with new O ring. From the red line / fuel cooler out, I got a good preassure. Still I could get the car running decnt for a minute before it started spitting loads of grey smoke and stumbling till it dies. Purge mode on, again I could do a minute and same disaster. Seems like the injectors are trying to compensate for lack of fuel, therefore the smoke I recon. So it still seems like lack of fuel but cannot get my head around why??? I could notice that even if I had good fuel preassure from the fuel cooler, the stream from the outer line pointing to rear exiting filter was real feeble. But the line was fine when shooting air thru. Any ideas? I am lost... Next I figure I go for the injector seals.... just in case
     
  18. neilly

    neilly Well-Known Member

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    when you say good pressure, did you measure it?

    at the FPR inlet?

    Cheers
     
  19. jamesmartin

    jamesmartin Well-Known Member

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    it should have a free flowing return to tank, id look at that and do injector o rings and washers if they havent been done in recent years
     
  20. northernbobber

    northernbobber Member

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    I had no tools to measure the prassure but what was coming out thru the fpr was loads. And I cannot understand what in the line would give bad preassure as all is replaced and checked.
     
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