i have a 96 gmc jimmy 4.3 v6 vortec ,i replaced the spider injectors ,fuel filter, and now fuel pump and still doesnt start it wants to try to turn over wawawawawawa but no vrooom i put fuel directly in the tb and it started for a few seconds then died, i also tryed the relays .i tryed talking to the gmc techs but they were dicks and told me to bring it in so they can rape me .i checked all the fuel lines and the bleeder sends the fuel back out to the tank so i dont think the lines are cloged.anybody have any ideas ? thanks