Greetings all... I have a G20 box van that has been idle for 2 yrs... would not start..OK have spark...fresh fuel...but no fuel to injectors...can jump pump at harness and get it running..fuel to tbi, but none at injectors,,,, also fuel relay not operating..can jump and get pump to run...No codes logged.. fuel sprayed into tb will start vehicle, but only for seconds...any ideas will be much appreciated...