fuel rail pressure regulator

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    (SOLVED) Weird fuel pressure symptoms

    Alrighty here goes nothing… My idle fuel pressure is at 9,000 psi I have tried commanding it higher or lower with my tech 2 to no avail. I disconnect the FPR no change. If I disconnect the Fuel Rail Pressure Sensor I am then able to command a change of pressure with my tech 2. 2005 GMC Topkick...
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    • fpr frps fuel pressure fuel rail pressure regulator
    • Replies: 20
    • Forum: LLY
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