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Touareg 3.0 v6tdi wont start

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  • #16
    Do not crack the lines on a common rail diesel.

    Big no-no.
    '07 Transporter 1.9 TDI
    '01 Beetle 2.0

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    • #17
      Theres no problem doing that, I've done it many times. The fuel lines do not need to be replaced once loosened anymore. The other possibility is your high pressure pump has killed itself, it was abit of a common thing for them to fail.

      Really needs to get to a mechanic so they can ensure it's been bled correctly and start testing fuel pressures ect.
      Volks Handy
      Servicing - Repairs - Diagnostics - Mobile fault scanning/clearing - A/c work
      10 years experience working for Audi/VW/Skoda
      Now in Perth NOR, Western Australia.

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      • #18
        High rail pressure is the reason why you dont crack the lines on a CR diesel.
        '07 Transporter 1.9 TDI
        '01 Beetle 2.0

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        • #19
          Originally posted by Snail Style View Post
          Theres no problem doing that, I've done it many times. The fuel lines do not need to be replaced once loosened anymore. The other possibility is your high pressure pump has killed itself, it was abit of a common thing for them to fail.

          Really needs to get to a mechanic so they can ensure it's been bled correctly and start testing fuel pressures ect.
          Are you seriously telling him to crack open high pressure lines on common rail system? Are you trying to kill someone? Do you know what type of pressure your dealing with?

          What are your qualifications to give this type of advice?
          Send it to a proffesional before someone gets hurt or killed!!

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          • #20
            agree, the pressure in the CR injector fuel line can cut your finger of or even worst.

            It can easily happen that spray out from the line could pierce your skin. Here is something that the DIYs don't discuss in the forums;


            In my early days at work (early 80s), my workmate was testing the diesel injector that had an opening pressure of 160bar (fraction of today's CR injector), one of the 5 holes at the injector tip was not spraying well, so he touched it with his finger. The stream pierced deeply his finger, he ended up in surgery and was out of work for more than 2weeks.
            Last edited by Transporter; 04-03-2014, 11:41 AM.
            Performance Tunes from $850
            Wrecking RS OCTAVIA 2 Link

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            • #21
              I've seen the photos, and heard all the stories. But a line which is cracked prior to starting up will not come spraying out with 1600bar of pressure. The rail aims to hold 300bar of pressure at idle and cranking via the fuel regulation valve n276 on the end of the rail. If the injector is cracked prior to cranking(ie. to bleed the system) a trickle of fuel will come out whilst cranking, or most likely air bubbles in his case. The amount of fuel in the rail is not all that much, so the slightlest leak will drop that pressure right off.

              I'm no expert but it's always worked for me in my day-to-day. I did also mention it really needs to get to a mechanic so it can be tested properly. Internet diagnosis seems to have failed to this point.
              Volks Handy
              Servicing - Repairs - Diagnostics - Mobile fault scanning/clearing - A/c work
              10 years experience working for Audi/VW/Skoda
              Now in Perth NOR, Western Australia.

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              • #22
                I note there is an if there. If the injector is cracked.
                I'm glad I don't work with you...
                2013 MY13.5 Passat V6 Highline Wagon. Watch this space
                GONE:2017 MY18 Skoda RS169 Wagon w/ Tech & Lux, 2007 VW MKV Golf GTi

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                • #23
                  Originally posted by Snail Style View Post
                  I've seen the photos, and heard all the stories. But a line which is cracked prior to starting up will not come spraying out with 1600bar of pressure. The rail aims to hold 300bar of pressure at idle and cranking via the fuel regulation valve n276 on the end of the rail. If the injector is cracked prior to cranking(ie. to bleed the system) a trickle of fuel will come out whilst cranking, or most likely air bubbles in his case. The amount of fuel in the rail is not all that much, so the slightlest leak will drop that pressure right off.

                  I'm no expert but it's always worked for me in my day-to-day. I did also mention it really needs to get to a mechanic so it can be tested properly. Internet diagnosis seems to have failed to this point.
                  Mate, cant agree more, that's why I don't post so much now, too many experts and you are right someone will get hurt or worse, I been around it for moons and cant stress enough how careful you have to be. The fault has been introduced here , it was fine before the filter, so really needs to be bled and tested properly, not poking and hoping.
                  To the OP hope you get a successful result.
                  Cheers
                  Jmac
                  Alba European
                  Service, Diagnostics and repairs. Mobile Diag available on request
                  Audi/VW/Porsche Factory trained tech 25+ yrs exp
                  For people who value experience call 0423965341

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                  • #24
                    +1
                    also, it would be good to know where the OP bought that fuel filter, is the genuine VAG from the dealer or Genuine ebay?
                    Performance Tunes from $850
                    Wrecking RS OCTAVIA 2 Link

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                    • #25
                      Originally posted by Transporter View Post
                      +1
                      also, it would be good to know where the OP bought that fuel filter, is the genuine VAG from the dealer or Genuine ebay?
                      For your information the filter was a genuine vag part from the local dealer.

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                      • #26
                        Originally posted by silverado25001 View Post
                        For your information the filter was a genuine vag part from the local dealer.
                        So, I take it, as it still refuses to start.
                        Performance Tunes from $850
                        Wrecking RS OCTAVIA 2 Link

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                        • #27
                          Yep no start , have removed the HPFP and taken it to some diesel injection specialists to be tested . Haven't had a diagnosis from them yet.

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                          • #28
                            Oh dear as far as that. As it was fine before the service, seriously would have been running the lift pump either via ECU, or power up probe or worst case low pressure air line in fuel tank to push up the fuel. You get air in it you chase the tail.
                            Jmac
                            Alba European
                            Service, Diagnostics and repairs. Mobile Diag available on request
                            Audi/VW/Porsche Factory trained tech 25+ yrs exp
                            For people who value experience call 0423965341

                            Comment


                            • #29
                              Originally posted by Jmac View Post
                              Oh dear as far as that. As it was fine before the service, seriously would have been running the lift pump either via ECU, or power up probe or worst case low pressure air line in fuel tank to push up the fuel. You get air in it you chase the tail.
                              Jmac
                              Exactly. Like everyone keeps saying it needs to be bled!

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                              • #30
                                To everyone who has posted their advice and ideas I thank you all for the encouragement. Well I finally got the engine running yesterday afternoon after reinstalling the HPFP.
                                The strange thing here is that when I cranked the engine in the past to try to bleed the return line from the HPFP with electric pumps running all I ever got from the pump was a trickle , this time I observed a good flow in my clear hose with lots of air apparent. Replaced return line to filter after purging most of the air , ran both elect pumps via a relay bypass for about 5 minutes ( The same way I have done previously ), replaced relays and proceeded to crank engine .
                                After 4 cranks of about 10 second duration with no warning engine started and ran smoothly. ( Felt like winning the lottery ).
                                So after reinstalling the HPFP the bleeding process was simple and as described by many, so having the HPFP tested by the diesel injection specialists seems to have cleared some kind of blockage or other problem with the pump.
                                So it was air in the system as expected and I can confirm the engine will self bleed and return air back to the tank if elect and HPFP pumps are working correctly.

                                Silverado25001
                                Last edited by silverado25001; 12-03-2014, 12:15 AM.

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