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I have an issue with my Treg 2006mod BAC engine 2,5tdi r5 If…

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Hi Peter I have an issue...
Hi Peter
I have an issue with my Treg 2006mod BAC engine 2,5tdi r5If its stand over night I need to cranck 30sec ++ before the engine starts.
Then it runs just fine.I have googled alot , and if I have understood it correctly the car has 2 pumps in the tank.
One for priming, and one for running.But if I need to cranck 30 sec before the engine get fuel, would that be a sign of a faulty priming pump?And do you got any tip about why the fuel return to tank when standing over night?
Submitted: 2 months ago.Category: VW
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Answered in 2 hours by:
5/29/2018
VW Mechanic: Wolfgang, VW Master Technician replied 2 months ago
Wolfgang
Wolfgang, VW Master Technician
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can you check your oil level ? is it over full?

please let me know

thanks

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Customer reply replied 2 months ago
Hi , I had that issue earlier with diesel in oil. Changed top and tandempump. Worked fine for 4-5 days then started to have start issue again. One theory is clogd filter in fueltank who make vacuum in fuel pipes. Plausible??
VW Mechanic: Wolfgang, VW Master Technician replied 2 months ago

that is possible but it may be the transfer pump that is going out when warm!!

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