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Re: P120F Fuel Pressure Regulator Excessive Variation
Posted to HD/Fleet Forum on 2/16/2019

The fuel recycling was one thing I had thought of, it would explain the low (high?) vacuum. The replacement pump is new from Ford. I do have an IDS, so my next step will be testing the high pressure pump and valves, I find it unlikely that the replacement pump... Login to read more.