Is the fuel pump also called the lift pump? or are there two different parts?? Cannot find a service manual for 99' and this is my first Diesel Cummins....I changed the fuel filter and tried to prime the fuel line, but it seems it wont fill the filter housing fast enough after about a dozen key on / start positions. I opened the drain port, and no fuel runs out.... bad lift pump? or bad fuel pump?? what am I missing?any help is appreciated.HR 20.