MF 135 fuel probs

[michael maclean]

Hi
Can any one tell me how to test if my lift pump is faulty
I have changed all filters & fuel pipes on my 135,But I can only get fuel to the first filter after that , ther is no resistance on the pump to push any more fuel throug???

 

[banjodunn]

G'day I would be blowing all the lines out from the inj pump to the lift pump, it sound like a blockage in there somewhere maybe even in the filter head. Even a worn out lift pump will usually push fuel through to the inj pump they only develop about 4.5 - 5 psi.
Just reading your post again and have to ask are you undoing the bleed screw on inj pump, It is the small screw on the pump body with the 5/16 head

Jon