Just an update on my truck found a mechanic that got the truck running the best it's ever run he found out that there was no power getting to the MAP sensor and replaced the sensor and wires to it and the truck ran awsome . But the other day I decided to clean up the frame and underneath of the truck and put underbody paint on it and after I degreased it and sprayed it with the hose the truck would not start again and the fuel pump stayed on when key was turned to aux so I unplugged the pcm like I did last time and the fuel pump didn't come on. So I called the auto parts store where I got the last one from and they said it had a lifetime warranty on it picked it up today plugged it in and the struck started rite up and ran awsome . Any ideas on what I should be looking for ?