motox tech
Full Access Member
Read on other sites that a quick test to check the lift pump on my 03 cummins is to drain the fuel bowl, put a 2 litre bottle on the drain hose and bump the starter. supposedly there should be about 1 litre of diesel after the pump runs for 20 sec. or so. My question is that, My pump is not on the frame but upgraded to the in tank version. I cant seem to find out if this test is valid on this type of pump, or if the pump is supposed to make some kind of noise? I did this test tonight and I dont get any fuel to the filter at all. I imagine this is not a good thing, but cant find many threads on the upgraded filter. any help appreciated.