My trucked was parked 5 yrs ago running. I just went to start it and it didnt start, I changed out the fuel pump, fuel pump filter, all spark plugs and wires, cap and rotor. Its running but misfirning still and it only stays running if i keep my foot in the gas. Im stuck im not sure where to go from here. I would put code finder on it but my plug doesnt work to get a code, any ideas where i should go from here??

 

More like a fuel issue. Sitting is no good for an engine. The gas gums up and clogs things. Clean the throttle body, IAC, Map, TPS etc. It could even be a partially clogged fuel injector. Replace the air cleaner.