Hello,


This one has me stumped. Om617 with 125k on the clock. New filters, Newer hand pump primer, New upgrade glow plug system and newish filters clean pre filter (note except glow plugs all added and changed after hard start issue and had no effect). The engine started this yesterday, regardless of glow time or throttle to the floor (might help slightly) it is very difficult to start. It usually takes about 30-60 seconds worth of total cranking throttle to the floor sometimes and starter stays engaged oil pressure never rises above 1 bar. Oil level is spot on. Once the car starts however, I have noticed acceleration is sluggish, but not all the time.



Where are these air bubbles coming from??? I cranked down the hand pump as tight as I could, it doesn't leak at all when I prime the filters. I replaced the rubber hoses and there is no fuel leaking anywhere. I hold my phone's light to the clear plastic line going to the lift pump from the fuel filter (presumable the filtered fuel) and at idle there are very fine bubbles when I rev through the RPMs I can see a stream of bubbles and then a gulp of air bubbles until I release the throttle and it goes back to idle and very fine bubbles again.

Is it leaking at the point where the hand pump primer assembly attaches to the the fuel injection pump where it mates up?


Where do I go from here?


Thank you!

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