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Thread: Audi A3 2.0 TDI BKD Engine - Not starting every few days without easy start

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  1. Exclamation Audi A3 2.0 TDI BKD Engine - Not starting every few days without easy start 
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    Hi all

    Recently purchased this as a little project to be my daily when it's sorted. It's 2005 A3 2.0 TDI, believe it is the 140hp BKD engine.

    The car starts and drives lovely (when it works) - no issues i've noticed, no faults, no codes, returns 40-50mpg with a heavy foot even.

    However, the car might start on the button every time for 3-4 days in a row, then it will refuse to start without squirting easy start into the intake. It cranks fine, but absolutely will not fire. Once it does start thanks to the easy-start however, it runs absolutely fine and will continue to work for a few days again without any hint of a problem.

    I have VCDS and cannot find anything untoward. No fault codes. I haven't looked at all measuring blocks in vivid detail, but when it has been running i've tried to spot any sensors not moving etc. and can't see anytihng blindingly obvious.

    When it is playing up, i've tried some trouble shooting. Again, no codes on VCDS either. I've tried removing the MAF and unplugging the coolant temp sensor as i know these can cause issues, no joy. I've also tried using a set of jump leads connected to my battery with another vehicle running which made no difference.

    The previous owner has had the injectors refurbished and changed glow plugs too with no joy.

    Given easystart fixes it, and its purely a starting issue, i am thinking it must be fuel delivery related?

    I have seen quite a few threads suggesting a common fault is the Tandem pump or it's gasket. Is this easy to rule out or check? Here for reference: https://www.audi-sport.net/xf/thread...t-start.55041/

    Thanks in advance
     
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  2. Re: Audi A3 2.0 TDI BKD Engine - Not starting every few days without easy start 
    #2
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    Personally I donít feel it is possible to refurbish those injectors but that aside, you could do with assessing the cranking rpm. To do this you disconnect the head harness and crank the engine over with VCDS in measuring blocks. You will need to do this for about 30 seconds because as you start cranking, VCDS will drop out and take a few seconds to come back into measuring blocks. If this figure is below 280 rpm, I would suggest a new starter IF the battery is 100% good, above 280 rpm, remove the injectors and check the seat faces for marking as per the VAG TPI pictures below.








    Dark was that day when Diesel conceived his grim engine that begot you, vile invention, more vicious, more criminal than the camera even, metallic monstrosity, bale and bane of our culture, chief woe of our Commonweal. How dare the Law prohibit hashish and heroin yet license your use, who inflate all weak inferior egos? Their addicts only do harm to their own lives: you poison the lungs of the innocent, your din dithers the peaceful, and on choked roads hundreds must daily die by chance-medley. Nimble technicians, surely you should hang your heads in shame. Your wit works mighty wonders, has landed men on the Moon, replaced brains by computers, and can smithy a "smart" bomb. It is a crying scandal that you cannot take the time or be bothered to build us, what sanity knows we need, an odorless and noiseless staid little electric brougham.

    W.H. Auden (1907-1973), A Curse:
     
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