when the truck cut off will it start back up if you spray fuel into the air intake? if it will then you need to use a fuel pressure tester to check to pressure, because its hard to look at 60 lbs of pressure and know what it is. that pump should be 60 lbs. max. and at least 38 to 40 to run the truck. there is suppose to be 12 volts at your inj. all of the time, but should flash when they fire, or click. the 12 volts come from the fuse box. put a gauge on the fuel line. never seen a chip keep the car from running.