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hello folks. a little catch up on the fuel problem. it was the hand pump and line. no visible leak. i put 5 pounds of air pressure through my tank vent tube and it showed up bubbling fuel out. i just took it off and plugged the outlet for it. the truck runs really good now. thanks for the help.

also do they not have any kind of check valve on the system?

also thanks in advance for all the help.

what about pressurizing the fuel tanks ? would that make fuel come out of an air leak on the return side?

hello . its a big cam cummins 1985 model. changed filter and had a new fuel hose made. full of fuel pickup tube is good. the only damp place i can see is on the hand pump and it is barely damp no drips. when it starts it runs good but not a snappy rev on the throttle. when you cut it off and...

hello folks. i am having starting trouble on a cummins 5 ton. i have read it could be an adjustable overflow valve. i have been looking for the tranfer pump nut no joy.starter winds for two minutes or so before it picks up fuel to start. can anybody point me in the right direction?