03 isx, fuel issue?

[mikestrucks]

First time issue, trucks wouldnt fire. would spin but nothing. fuel filter fine, tried diesel rag against air filter, even little starting fluid, nothing worked. got mechanic out, he didnt find anypower to lift pump and it didnt seem to be making any sound before starting( someone told me it should hum or something) tried running hot jumper wire to it ( the lift pump ) and it started! it started several more times with original wiring hooked back up. set over night and started again today. so mechanic thinks we should try lift pump first! sound reasonable? any other ideas? and lift pump had power after starting but not with just the key on!