Touareg 3.0 v6tdi wont start

[Snail Style]

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.

[99_FGT]

I note there is an if there. If the injector is cracked.
I'm glad I don't work with you...

[Jmac]

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

[Transporter]

+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?

[silverado25001]

+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.

[Transporter]

For your information the filter was a genuine vag part from the local dealer.

So, I take it, as it still refuses to start.

[silverado25001]

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.

[Jmac]

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

[The One]

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!

[silverado25001]

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