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Thread: 04 D2a TD5 turns over but won't start

  1. #1
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    04 D2a TD5 turns over but won't start

    G'day all, just wondering if anyone in/near Geelong has a Nanocom to suit a 04 TD5 auto Discovery? I need to get my ecu coded (?) to the car. Happy to pay in cash/beer of course. Its a incredibly long story of awesome and anger (mainly anger lately......), but basically the car just winds over and wont fire. I had another ecu in it to see if that was the problem (massive thanks to Danny @ The Landy Place for all his help/ideas/parts/beer, but I can't get it to him to re-code the ecu at this stage), and it made little difference. So i'd like to put my original ecu back in and continue on trying to find the issue(s). The way this all started to eventuate this time was I was driving to work and felt it randomly die (i'd be lieing if I said this car hasn't been a pain in the butt since I've got it at times, yes I bought a lemon, i'm well aware of this. Yes it had a a full comprehensive service history from a "reputable" land rover specialist in Melbourne (no i'm not going to name them)). I managed to get it re-started a few times over a km or two (I've got a basic icarsoft computer which sometimes does clear codes....), but it ultimately wouldn't rev/go and then finally wouldn't start, Que the tow truck.
    As an addition to the incredibly long story, its had new fuel pump(s), the pressure is 4.5bar at the regulator, it holds pressure there on the gauge we put in. The injector washers/seals have been replaced with genuine ones (again) (there was a slight smell of diesel in the oil, but no noticble change in oil level. And no sign of diesel/oil in the water). A compression test was done, all are high and even. The regulator isn't 12 months old. The entire engine wiring loom has been removed from the car and checked by a auto-elec (he doesn't have a computer to code the ecu) and all tested ok. All the fuses/relays have been checked/replaced. It will fire for a short time on Start Ya Bastard, but obviously that's not ideal. I read somewhere that it might start in D not P (something to do with the XYZ switch?) it doesn't make a difference. Prior to the borrowed ecu it did pump some grey/white smoke out the exhaust when cranking. The battery has been checked/load tested at the battery place and the CCA is basically brand new (925cca, still got the receipt beside me). The starter was rebuilt. The MAF has been tried plugged in, and not plugged in. The crank angle sensor was replaced with a aftermarket one. The sensor in the intake has been replaced/cleaned. The EGR was already removed/blocked when I got it. The ecu I want to put back in it does have a TRS remap. Trying to think of what else to add here? We're kinda leaning towards it being a electrical issue of some sort? Maybe? Hopefully? If anyone has any ideas where to go from here (burning it isn't really a option, as much as its tried/trying my patience I still do like the piece of crap).

  2. #2
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    If you are putting back you original ecu , you won't need to recode
    If the injectors were put back in the same order , they wont need anything either
    Check the engine rpm when cranking , this will tell you if you are getting a signal from the crank angle sensor
    Do a pulse test to each injector with nanocom to check continuity ( engine not running , you should hear a distinctive click from each injector)
    Have you had it running since changing the injector washers ?, if not then bleed it again ( 5 pumps to floor of accelerator pedal, ign on ), then flat to floor while cranking , backing off if starting to fire.
    Let us know how you get on

  3. #3
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    Thumbs up

    Quote Originally Posted by discorevy View Post
    If you are putting back you original ecu , you won't need to recode
    If the injectors were put back in the same order , they wont need anything either
    Check the engine rpm when cranking , this will tell you if you are getting a signal from the crank angle sensor
    Do a pulse test to each injector with nanocom to check continuity ( engine not running , you should hear a distinctive click from each injector)
    Have you had it running since changing the injector washers ?, if not then bleed it again ( 5 pumps to floor of accelerator pedal, ign on ), then flat to floor while cranking , backing off if starting to fire.
    Let us know how you get on
    G'day mate, just went and tried to start it (as we hadn't tried since re-installing the original ecu). Still just winds over, no joy there. I bled it twice prior to trying as well as its sat for a few weeks now (battery was still fully charged). Thanks for your ideas though

  4. #4
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    So has it been running since you replaced the injector washers?

  5. #5
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    No it hasn't. We tried another set of injectors in it to see if that was causing the non-starting issues, and they didn't change anything. So it made sense to put new washers in it when we put the original injectors back in cause they really aren't that expensive ultimately. Ever since it died and needed the tow truck it just turns over and doesn't even look like trying to fire. It's had a couple of different crank angle sensors. As I said the wiring has all been checked, nothing appears to be wrong there. Granted the crank angle sensors aren't brand new genuine ones (pretty sure they're quite a few hundred dollars? Yes i'm 100% working to a budget here lol. And unless i'm 100% guaranteed spending many hundreds of dollars on one part will 100% fix the problem when various other ones haven't, i just can't justify that). I don't recall the nanocom its been on saying anything about this being the problem/logged problem, but who knows

  6. #6
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    So when y pop u replaced injectors you recoded them with nanocom, and when that didnt work old injectors went back into correct order they were taken out of originally?

  7. #7
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    Yeah they were stored in order and put back in the exact same order

  8. #8
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    does the fuel pump have an even sound when you turn ign on or does the sound vary ( cavitation noise )?
    if the sealing surfaces on the injectors / head face weren't spotless when washers were replaced it will not bleed up properly
    If , for a few days / weeks before it died it was taking longer to start than normal ( within a couple of seconds ) then that is injector washers failing
    did you set injector bump clearances ?
    is the injector harness properly plugged in and recently replaced?

  9. #9
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    Quote Originally Posted by discorevy View Post
    does the fuel pump have an even sound when you turn ign on or does the sound vary ( cavitation noise )?
    if the sealing surfaces on the injectors / head face weren't spotless when washers were replaced it will not bleed up properly
    If , for a few days / weeks before it died it was taking longer to start than normal ( within a couple of seconds ) then that is injector washers failing
    did you set injector bump clearances ?
    is the injector harness properly plugged in and recently replaced?
    - Yeah the pump isn't too old, even when running the bleed sequence (just over 1/2 a tank) there doesn't sound like any cavitation noises
    - All the surfaces were as spotless as possible when they were replaced, no visible debris/marks/etc
    - Its had patches since i've bought it (couple of years now) where it was a pain to start daily, quite alot of patches.... But everything was running right for around 7-8 months prior to it dieing this time (daily to-from work, Geelong-Drysdale, its only 25km or so each way but it never faulted.......untill it faulted.....).
    - Yes, my old man's a retired diesel mechanic (at least labour is cheap ) so he tells me all that was done right
    - The injector harness is brand-new. And another known working second hand one was tried prior. No oil in the plug, or the loom (there was when I first bought it, it was all cleaned and the harness replaced then)

  10. #10
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    Mine had a dud mercury switch that stopped it going..it failed to hold on reset..sort of cutting in and out. New switch fixed it.

    Supplier said they can n do fail....heat stress maybe?

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