fuel rail pressure

  1. L

    Insights into Fuel Problem

    Fuel filter on my truck physically failed. I knew it was time for a change so I already had a replacement in hand. Switched it out. Afterwards a P0088 code for high fuel rail pressure appeared. It has been accompanied by the following caveats. After I start the truck, it idles rough. If I...
    • LB74ever
    • Thread
    • fuel filter fuel rail pressure limp mode p0088
    • Replies: 13
    • Forum: LB7
  2. D

    Negative Desired Fuel Rail Pressure

    Hello, I have a 2008 6.6L LMM drivetrain with 140k miles (it is a converted 2007 suburban 2500). When I accelerate hard the fuel rail demand is dropping to a negative number, in the attached example it goes from about 9k demand to -8k demand. I also noticed that even in WOT the demand never...
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