Ok so I let my truck sit for a couple days after I drove it around and I jumped in it to go to work and all it did was crank. So I checked for spark and there was non so I changed the cool and the ignition module. Still nothing the only time I can get it to run a little is to use staring fluid. The top of the distributor was really rusty also were the rotor goes on. Could this be the issue or is it a fuel pump problem? I checked the exam fuse and injector fuses and there all good. I just don't want to put a pump in it if it's not the problem.