Re: Injection Pump and FSD
I have to agree with Plano, an intermittant p0251 is very likely air entering the fuel system. You could try swapping out the inj pump feed hose with a clear plastic hose and run the engine and inspect for bubbles. also if you relocate the pmd and leave the old one in place you will need the resistor from inside the connector body, or a new one of the same value. The resistor is mated to the pump so the same value resistor is required in the new pmd. Hard to see but do able with a mirror and flashlight, not to mention a little patience.
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