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GOLF/A3 2.0 TDI BKD Warm Cutting out/Starting Problem

Discussion in 'A3/S3/Sportback (8P Chassis)' started by Oak Dub, Jan 23, 2011.

  1. Oak Dub
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    Oak Dub Member

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    [Jan 23, 2011]
    Hi guys, i know this has been covered many times before and have searched to find a cure for this but still no joy. Story goes the head cracked on my mates MK5 2.0 TDI so far i have changed the cylinder head/bolts/gaskets/DMF/Clutch/starter/coolant temp sensor/x2 second hand injectors and seals on all injectors/battery/glow plugs/crank speed sensor.. Still the car is running a little lumpy on cold start but that clears up and runs fine till warm then idle will drop/run very lumpy and cut out, when trying to restart the car will maybe start after 45seconds but again will cut out unless the accelerator is held down a little. Even while accelerator is held steady the revs will go high/low very slightly. Any ideas as to what else i could possibly try??:unsure: Remap is a no go as friend will not do it.
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  3. mike foster
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    mike foster Fossie VCDS Map User

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    [Jan 23, 2011]
    Did you change the injector wiring loom as well which is known to cause most of the problems you have described ?

    Typical problems very well documented on here - just do a search
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  4. Oak Dub
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    Oak Dub Member

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    [Jan 23, 2011]
    Iv not yet changed that, but if that was to be at fault would it not cause this fault all the time rather than just warm? I have also checked through the search option but didnt find much else..
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  5. mike foster
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    mike foster Fossie VCDS Map User

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    [Jan 23, 2011]
    Did you search for 'injector wiring loom' ? And - no - it doesn't cause the fault all the time .
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  6. Oak Dub
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    Oak Dub Member

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    [Jan 23, 2011]
    Il try this next then, other faults iv been told to look out for is the in tank fuel pump and the high pressure fuel pump on the right side of the block, would these possibly cause this problem too?
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  7. mike foster
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    mike foster Fossie VCDS Map User

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    [Jan 23, 2011]
    Hopefully someone else may be able to help with your supplementary questions.

    I'm afraid I've run out of info. !
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  8. Oak Dub
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    Oak Dub Member

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    [Jan 27, 2011]
    Tried to change the injector loom with a new genuine item but still same probs. Any other checks or places to look at?? This is seriouosly starting to PI$$ me off!!!!:gun2:
    Last edited: Jan 27, 2011
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  9. VAG_BADGER
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    VAG_BADGER Ricers in the rear view!

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    [Jan 30, 2011]
    The only thing left that I have experienced is the Crankshaft oil seal. The seal expands if it has ever been hot and distorts ever so slightly. The seal contains magnetic points that the crank sensor picks up on and give a false reading to the ECU when it warms up and giving the exact symptoms you are describing. The best way to diagnose it is to graph the crank sensor output (I used VAS) and you can see an anomalous output flat spot. The seal bolts in and comes complete with the aluminium plate. Silly idea as they spin the actually seal with the crank as the pickup! Hope this is of help to you!
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  10. Oak Dub
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    Oak Dub Member

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    [Jan 31, 2011]
    Changed this too with genuine new. :(
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  11. NHN
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    NHN Retrofitter - Audi - VW - Skoda - Seat Site Sponsor VCDS Map User

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    [Jan 31, 2011]
    I was about to suggest the fuel pump, there's intank & the tandem one on right side of engine, I would try these next mate as if done coolant senders, starter, injectors & loom, cant be much else left.

    ECU maybe an issue, try reflashing this aswell or swapping out, as I said not allot left to change surely.
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  12. Oak Dub
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    Oak Dub Member

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    [Jan 31, 2011]
    Changed the tandem pump on the right side of the engine aswell. Going to have it VAGCOM'd on friday so see what this brings.
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  13. NHN
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    NHN Retrofitter - Audi - VW - Skoda - Seat Site Sponsor VCDS Map User

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    [Jan 31, 2011]
    Did you not vagcom 1st?

    Ah hold on, did you change the fuel filter yet?
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  14. Oak Dub
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    Oak Dub Member

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    [Jan 31, 2011]
    Not VAGCOM'd yet however did take it to my local vw/audi specialist and they plugged the car in and assured me replacing x2 injectors would cure the prob but it didnt so not going to go back there.. Also tried to change the fuel filter for genuine vw.
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  15. Legacy 91...
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    Legacy 91... ADRENALINE JUNKIE ;)

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    [Feb 4, 2011]
    what gearbox have you got in it ? DSG ?
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  16. Oak Dub
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    Oak Dub Member

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    [Feb 5, 2011]
    Manual 6 speed box.
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  17. Oak Dub
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    Oak Dub Member

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    [Feb 11, 2011]
    Ok who or where does testing/refurb on these injectors?? Part no 03G 130 073B. Long shot but place that doesnt charge arm/leg..:blink:
    #16
  18. devonmikeyboy
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    devonmikeyboy As far from JBS as possible !

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    [Feb 11, 2011]
    Sorry to here your still having problems with your engine. Only place i know and trust is united diesels as he has fitted uprated nozzles for me in several different injectors. Price to test i think is £50 or more per injector so not cheap. Diesel injectors, diesel engine problems, united diesel uk
    #17

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