2004 Isuzu Rodeo

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  • TomCs
    Junior Member
    • Nov 2011
    • 12

    2004 Isuzu Rodeo

    I a getting a P1239 on an Isuzu with a 3.5 L direct injection system. This code usually relates to the high pressure fuel system. Is there any way to get the values from the high pressure sensor? When I list the data, it shows FPR which I assume is the Fuel Rail Pressure, but the value (50.1) makes no sense for the high pressure system. That is the correct value from the low pressure fuel pump.

    I use a Modis with 11.4.

    Thank you
    Tom
  • crackerclicker
    Senior Member
    • May 2008
    • 400

    #2
    is it possible that pid is reporting in 'bar'? 50 bar equals 725 psi.

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    • TomCs
      Junior Member
      • Nov 2011
      • 12

      #3
      Not sure, but the pressure should be between 1500 to 2000 PSI. I tried another scanner and it is reporting 50 Kpa which is only about 7+ psi????

      Comment

      • crackerclicker
        Senior Member
        • May 2008
        • 400

        #4
        Originally posted by TomCs
        Not sure, but the pressure should be between 1500 to 2000 PSI. I tried another scanner and it is reporting 50 Kpa which is only about 7+ psi????
        well, i suppose either 7 or 725 psi is low enough to set a code . could you wing it by graphing the frp signal wire with a scope? probably a .5 to 4.5v signal with .5v being the low end. does the code trouble tree offer you any recourse?

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