ctva
Well-Known Member
It could be an air leak on one of the unions. This happened to us years ago in Holland about 50hrs after fitting a new engine, fuel tank and pipework. Did the usual change filters etc and in desperation called the Beta agent in Ipswich who said it's an air leak - tighten all the unions - which I did and it's been fine since.
As I was reading through, checking for air leaks was my first thought before replacing filters. Open the bleed screw at the primary filter and use the manual lift pump to see if air comes out as a first check along with any evidence of diesel leaking at any joint. Failing this yes, check the filters (secondary first) trying to run it after each change.


