I forgot to add in my earlier post about "It's not the injector pump".
Your starter motor has enough power to literally "shred" the injector pump. There is no way anything wrong with the injector pump could freeze the engine. The starter can strip every gear in the pump from the big one in front to everything inside. Trust me, I know on this one.
It's not anything to do with the pump, don't remove it! You will have at least a six hour job (R&R) and it will not change anything.
pete
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