When I shut my truck off Fri eve it was running fine, Saturday, I changed out the water pump. When I went to start the engine again it just cranked, ...nothing! I figured I must have loosened a wire or something, checked all the connections plug wires etc. everything seemed O.K. still wouldnt start. Took out a plug, NO spark! This one's a toughy as all the plug wires connect directly into the primary and secondary coils from the top, and the other connections appear to be O.K. I suspect something (coil(s) computer or something else) picked this time to crap out on me. I'm hoping somebody can give me an idea of what else to check, I'd hate to buy new coils only to find out it was something else. I replaced the coil pack since there wasn't any spark but that didn' help either, something else is causing this problem