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    Volvo Penta V6-240 Fuel High Pressure Dropping to Zero

    Here's the RPM to Fuel Rail Pressure chart for this V6-240 engine. 143bar = 2074psi
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    Volvo Penta V6-240 Fuel High Pressure Dropping to Zero

    Great information!! Thank you. So, I'm hearing not any kind of limp mode. See my reply to @harringtondav above. The two lower pressure stages (which I believe are the X-fer's you're referring to, correct me if I'm wrong) hold their normal psi even after the high pressure pump fails and...
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    Volvo Penta V6-240 Fuel High Pressure Dropping to Zero

    Thanks for the reply and info. Agreed, the injectors are PWM controlled. Put in two new pumps now, same issue. They are CAM driven, but seem to be regulated with a signal from the ECM. I believe, after looking at it with an oscilloscope, the signal from the ECM to the high pressure pump is...
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    Volvo Penta V6-240 Fuel High Pressure Dropping to Zero

    Stage 1 and 2 are black, but I know nothing about paint sprayed inside of them.
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    Volvo Penta V6-240 Fuel High Pressure Dropping to Zero

    Yes, that's my system. I've tested the 10-20 PSI stage AND the 55-75 PSI statge in the test ports with a guage, and the both never drop off. Measured the high side pressure at 2000 - 2043 psi (with the Diacom software, no test ports for it) before it drops off to 24 psi
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    Volvo Penta V6-240 Fuel High Pressure Dropping to Zero

    Looking for some help here. Back story: Had a DTC 0174, Adaptive Learn Bank 2 High fault. Engine went into limp mode. Thinking it might be an injector issue (broken/stuck/clogged), I replaced the injectors, all of them just to be safe. After resetting the code and leaving the ECM unplugged...
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