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Message: [QUOTE="6.0 Tech, post: 1558003, member: 23001"] -2 isn’t bad. Ford would never give us a “spec”, but had an engineer tell me once if you’re seeing in the +/- 10 range that ain’t good. I’d be leaning more towards the hi pressure pump seal having gone out as the fella above me said. But this being a 6.4 anything else is possible as well. Are you losing coolant at all? Front cover could be cavitated. Best way to check is to drain the oil, put dye in the fuel filter housing. I’d typically put 3 bottles in. Then command the fuel pump on with the drain plug out. See if you have dye dripping out. If you do, it’s the hi pressure pump seal. If not, pressurize the cooling system and see if you’ve got drips. If not, fill the oil, and run the hi pressure fuel pump test 5 times in a row. Then pull the valve covers and use a Uv light and check all the injectors for dye on the bodies or the line connection points. Sent from my iPhone using Tapatalk [/QUOTE]

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