Join Date: Jan 2009
Location: Hillsborough, NC
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You can replace either with the cab on. Before you start tearing into the truck, have you checked the pressure on the fuel supply? There is a schraeder valve on the fuel cooler to check it with, it should be around 15 psi. If you don't have pressure before the HPFP you can't build up rail pressure. Always start with the easy stuff first. Could be supply pump, fuel filters, or cracked line. All are easier to get to than the HPFP, or injectors.
Rudy's Diesel Performance - 919-383-9300 - Diesel Tech
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