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External fuel pump control over PWM and OEM FPC

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  • Chris
    replied
    No problem. And it appears the controller does convert the frequency. Looks to be quite a good unit.

    Leave a comment:


  • tpsretard
    replied
    $%#$%ing auto correct.

    100hz

    Leave a comment:


  • Chris
    replied
    Does the 1hz setting give 1hz pwm to the pump or does the FPC convert the frequency?

    Leave a comment:


  • tpsretard
    replied
    I run the Range Rover FPC on an 044 or problems yet,

    0 PWM = off
    50% PWM = Full output
    1- HZ operating freq

    Leave a comment:


  • Chris
    replied
    Same deal. Fuel pump controller = fan controller.

    Leave a comment:


  • Hyper
    replied
    looked into SSR but didn't want to mess with diodes and heatsinks

    ended up getting OEM FPC off Jag/Land Rover, they were reported to operate very good through pwm control

    IMG202007011451262.jpg


    now I want to go even further and figure out a way to "soft-start" my SPAL fans, because they draw a lot of amps at start and shock the electrical system

    Leave a comment:


  • Chris
    replied
    A solid state relay would suffice.

    Leave a comment:


  • tpsretard
    replied
    The stock pwm controller is at its limits for the stock pump. It will never control an 044. Most of the time when they fail, they fail at 100% output.

    Leave a comment:


  • Hyper
    started a topic External fuel pump control over PWM and OEM FPC

    External fuel pump control over PWM and OEM FPC

    Since I am rebuilding my GC8 from scratch, I am redoing the wiring completely
    I want to use this opportunity to include some of the additional elements in the wiring

    SM4 plugin 1.15 Subaru

    Running OEM FPC to the stock intank fuel pump, and external bosch 044 fuel pump hardwired through a relay. operating 100% duty all time

    What I want to do is add a 2nd OEM FPC that will control bosch 044, so that I can keep the duties low during low loads and idle. OEM FPC outputs just enough amps to operate 044 pump

    OEM FPC operates from the ECU using the following PWM parameters:

    The signal from the ECU is 3.8V peak
    Frequency 80H

    My question, is how to setup the output from the ECU to make it work, and also mimic OEM operation (key on - prime, stop. Engine running - variable PWM depending on load)
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