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Discussion Starter · #1 ·
Melted a piston and had to completely rebuild my '01 7.3l. All new Ford OEM parts, including the LPOP. I can fill the HPOP reservoir, start the truck, but it will not build any oil pressure on the engine oil lubricant side. The pump is getting prime, filling the oil filter, but not showing up on the gauge OR the valve train.

Any ideas?
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