Just got my father-in-laws '88 K5 (5.7 350) and was told it had fuel pump/no starting problems which is why he let it sit for a year. He originally told me the fuel pump would not prime when in "key on" position but when I got it towed to my place and started to look into it I can hear the pump prime now (maybe the tow and fuel sloshing around did something). SO... I've been researching/reading up on this issue and could be several things going on/causing no fuel to spray in the TBI. Just look to see wheres the best place to start in troubleshooting and looking for some input/suggestions. Here's what I came up with as the best logical order to start: Check pump relay for proper operating/voltage in "on" and "crank" positions (I know its getting power (good fuse) since i hear it prime) but is it possible that one side of the relay will power the pump to prime but when it switches over for the ECM to take over in the cranking/run position that side of the relay could be bad? Noid light to check pulse at injectors while cranking (if OK the ECM is good?) Check for proper fuel line pressure at prime and crank (if OK this should also confirm that the relay and pump are good?) if pressure is still "0" while performing fuel line pressure test I can assume the pump is bad? Fuel filter was recently swapped out and new battery installed btw.