This originally started out as an intermittent problem starting and running sometimes but not others. We thought it may have had a bad fuel pump so we changed the pump. Afterwords we have never been able to get it to start again. We checked the fuel pressure at the test port and it has around 45psi when the key is turned to the on position. Also we tried spraying starting fluid into the throttle body and the truck will start and run until it burns off the fluid then dies. So the truck has the fuel pressure, obviously it is getting spark because it will start and run on the fluid and also it must have compression because it was start and run. But it will not run on its own. The only thing i could figure is that the fuel injectors are not spraying, but we pulled the harness and checked the wires with a multimeter and they are getting power. I'm totally stumped any suggestions would be GREATLY appreciated!! Thanks