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Power Strokes
6.4 Tech
P0088 Hpfp Questions
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[QUOTE="Dzchey21, post: 329977, member: 63"] Its under the passenger side valve cover. The code is throwing because desired rail and actual don't match. About the only things it can be is the sensor, the hpfp, our the harnesses for the pump under the pump cover grounding out on the block effectively raising the pcv or vcv value and making the pump output higher than desired. So I would do the sensor first just because. Some tunes may have a higher threshold for that particular code. [/QUOTE]
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