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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.
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!!
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.
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.
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
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
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!
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.
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