Lift pump failure would be very good.....easy to access and not too much coin...

I assumed the lift pump was fine since I was getting fuel but maybe just not enough pressure/flow???

How do I test the lift pump? I think I saw on some other threads that output should be something like 150cc/30 sec? Should I disconnet the filter hose and stick it in a jar and crank the starter for 30 sec and measure the output?

I would assume that is a MINIMUM output standard. What should a normal/new lift pump put out on the 603 engine?

I would assume my lift pump is original with 522,000 miles...probably worn out by now...if this a common failure considering the age and miles?

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1987 300TDT
1981 VW MKI Caddy 1.6 diesel, waiting on engine swap
1983 D-50 Power Ram 4x4 "Mitsubishi" 2.3 turbo diesel
assorted gas powered crap and motorcycles

RIP: 1984 300TDT, 1982 300TDT, 1984 190D 2.2, 1992 300D 2.5, 1987 300TDT, 1982 Maxima LD28, 1983 Maxima LD28, Isuzu C223 P'ups X3, 1983 Holiday Rambler 6.2 Banks turbo diesel, 1984 Winnebago LeSharo 2.1 TD, 1985 Allegro 6.5