I've got a 1992 with the 302 and auto trans. Its been getting worse and worse, but today was especially bad. When I hit the gas from a dead stop, the trucks engine stumbles and wants to die but picks up and goes after a second. Also when starting, I need to prime the fuelpump atleast twice or else it wont start. It has this "old gas smell" once it fires up... I've replaced cap, rotor, wires, fuel filter and fuel pressure regulator with no fix. Would tps be a culpret? any other ideas??