Help! I went out to start my truck last week and no spark. So I have replaced the ignition module, coil, distributor and now the ignition switch. The symptoms: It will sometimes start now but then die after a few minutes, other times it will not start at all. When it wont start: no spark and now power to fuel pump. I have wiggled every wire I can find while it does run to try to make it die and no wires seem to be the problem. I have checked the relays and alternated the locations and no change. When it doesnt start the fuel relay doesn't sound like it is clicking but hard to be sure. Please give me some advice.

Thanks
Charlie