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Sounds like a UVC harness problem to me.
Your best approach is to get the codes pulled with a PSD capable scan tool (on that can do an injector buzz test). You'll most likely get a P1316 and one or two P127X codes indicating an open in the injector circuits. The X in the code will indicate which cylinder the problem is in.
Alternatively, if it will start at all, is to get it running and pull one of the outer VC wiring connectors off (check the Hard/No start link in my signature). If the engine dies when you pull the connector off, then that side is probably good. If there's no effect to the way the engine is running, then you've found the bank that's causing the problem.
The best repair is to replace the UVC harness with a new one that has an improved latch design. There are also plastic shims available that stiffen up the latch on your existing harness and make it latch better. They're a stopgap repair, IMO. I'd recommend spending a bit more money on a new harness.
Wiring Harness, Injectors & glow plugs
Ford F81Z-9D930-AB ~$60-75 each
Int’l 1830844C93 ~$25 each
Retainer (Under Valve Cover Harness clips)
Ford 2C3Z-14A163-AB ~$10
Int’l 1844193C91
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First truck -- 1929 Model A Ford pickup, restored from ground up. Wish I still had it!
99.5 F250 PSD Supercab LB 4x4, 6spd, 3.73LS, Boost & pyro gauges, Swamps S175/146 injectors, Jody's 80 HP Econo PCM (classic version  ), AIS, coolant filter w/"hokum" bracket, regulated return, heated mirror mod, lighted cupholder, Marinco heater plug-in.
Hard or no-start? Check here
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