Had the truck stall on the road after jittering. could not restart it. towed it home. acted kind of like a fuel pump , but is was replaced about 4 years ago. after we got it home and it sat for a few days. Got it started up and it ran for a few minutes took it for a test drive and it quit a a hundred yards or so from the house. replaced the coil and crankshaft sensor. but no change. checked the relays and the fuel relay was not clicking in when the key is turned on. switched the relays around. the fuel relay works in the ads position. but not in the fuel relay position. so no the relay apparently. When the key is on the fuel relay socket has voltage at two terminals. haven't been able to get the fuel pump plug unplugged to be able to check for voltage. but with the relay not engaging don't know what to do next. someone had a similar problem? where to go from here?