Question about 2004 Volkswagen Golf

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Golf mk5 tdi sometimes wont start.

This has only happened twice you go to the car and open up as usual wait for glow plug light to go out and it just turnes over and over and doesnt start,there are no warning lights on dash plenty of fuel and so on,once it starts it is perfect no lack of power or surging.can you help?

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  • hammerit Jun 30, 2008

    Thanks for your help, i just left the car and tried again later then it started after a couple of tries,i used the same key remotely both times and even tried locking and unlocking the car just incase! It is v strange it sounded as if the diesel had ran back to the tank or airlocked as it started gradually if you know what i mean, i put it over the pit and checked for leaks on the pipes etc but found nothing out of the ordinary..The only thing that i can say both times is that it was under half a tank of fuel both times and am wondering if it is anything to do with the pump in the fuel tank? Thanks again.

  • a_vinesy Aug 11, 2008

    i have a 2002 1.6 16v golf s petrol, i have the same problem sometimes it will start fine others it just wont start i have to leave it for a while and come back but even then it suggles to start any ideas?

  • Anonymous Aug 17, 2008

    i have a mk5 tdi and i had this same problem i took it to the dealer and they checked the car over and had to replace the injector seals this solved the problem however my car was remapped and i dont know if this caused the problem or not

  • pathpost May 18, 2009

    I have the same problem with my 2001 Golf. I could not get the ignition to turn over the first time on several occassions. Then I took it in twice for diagnostic checks. After the second check, the immobiser light came on (??). But it has stopped after it the light came on two days in a row. The dealership said to try to buy my valet key and see if this prevented it occurring again. They want, of course, to replace the immobiliser unit for $800.00. But I wonder if buying a valet key, and resetting it is a good idea? I don't trust neighborhood repair shops with a complicated issue like this. Anyone have any ideas? Thank you!

  • Anonymous Mar 21, 2014

    starts when cold,once warm glow plug light on dash doesnot come on and will not start



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Hi, I have a 2004 golf tdi I had this same problem, turns out the corner gas station had bad fuel.. try filling up at a different station..
The reason I know this for a fact is my wifes tdi had the same problem and the neighbor down the street had the same trouble with his diesel pickup..

Posted on Jun 30, 2008

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You didn't say how you got round this problem when it happened - did you keep on trying or go away and come back later? I'm thinking you may have an immobiliser issue with the ignition key not being read correctly by the detector coil in the steering column. Did you use the same key on both occasions, and did you open the car remotely or manually?

Posted on Jun 30, 2008

  • Richard Raynor Jun 30, 2008

    Hi Hammerit.

    You wrote "it started gradually if you know what i mean". This leads me to suspect that the glowplugs might not have been glowing properly, rather than a fuel supply problem. Best course of action with a TDI is to get a proper electronic diagnosis - either from a properly equipped dealer or learn how to do it yourself for about £15 - £20 plus the use of your laptop.

    I don't think you will find any problem with the pump in the fuel tank because I don't think there is one ;-)

    Busgeek79's suggestion has merit, and you might think about draining or even changing the fuel filter, but do remember that some people are running their TDI's on old chip shop oil !

    I hope this helps you to sort it out, and if you need any further thoughts, just ask. Thanks, ****.



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