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Pro-Flo 4 Fuel Injector Wiring Harness Layout

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  • Pro-Flo 4 Fuel Injector Wiring Harness Layout

    There's been some confusion as to how the Pro-Flo 4 fuel injector harness gets laid out on different engines. In order to have a single fuel injector wiring harness that fits all engines regardless of make or cylinder order, the harness has been designed to have call outs for left or right bank cylinders and numbered 1-4 from front to back. Left bank injectors are labeled L1, L2, L3 & L4 and right bank cylinders are labeled R1, R2, R3 & R4. Left and right banks are determined by viewing the engine from the back - see image below.

    PF4 Injector Wiring Numbers.jpg

  • #2
    Why is this diagram not in the manual?

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    • #3
      It'll be going in. Instructions get periodic updates. Next update is pending.

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      • #4
        Thanks for this excellent diagram. I was stuck and not sure of the layout. I am used to 1,3,5,7 and 2,4,6,8.

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        • #5

          What does the term "Sticky" mean, is that an Android term, or does that mean people are just pissed off about the Pro Flow? I have no clue, but I need to get a new Android Tablet that wont fall apart straight out of the box.

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          • #6
            Originally posted by jordaneast View Post
            What does the term "Sticky" mean, is that an Android term, or does that mean people are just pissed off about the Pro Flow? I have no clue, but I need to get a new Android Tablet that wont fall apart straight out of the box.
            it is a permanent post above the questions asked by us.

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            • #7
              Originally posted by jordaneast View Post
              What does the term "Sticky" mean, is that an Android term, or does that mean people are just pissed off about the Pro Flow? I have no clue, but I need to get a new Android Tablet that wont fall apart straight out of the box.
              Call 800-416-8628 techline
              Don't get too caught up in the numbers.
              Just give the Engine what it wants &
              Let the numbers be what they are.

              Jim McFarland....

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              • #8
                I have a small block Chevy with a cam ground for a 4/7 swap. Can I switch the pins on the injector harness between Visitor Messages#7 and#4 and vise versa, which would be left 4 and right 2 injector wire to accomplish this when I swap the spark plug wires from Visitor Messages#7 to Groups Groups Groups and vice versa? Has anyone done this or should I have any concerns about this firing order modification?
                Last edited by Badvibe434; 05-25-2022, 09:50 AM.

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                • #9
                  Don't use the # sign. It turns it into forum links.

                  You can put a space between it like this: # 1234
                  "Do you know how whipped an engine has to be to blow that loud?"....Bug from the movie Uncle Buck
                  https://forums.edelbrock.com/filedat...?photoid=42773

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                  • #10
                    Thanks for that ,I didn't know why it was doing that.

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                    • #11
                      Anyone know about a 4 7 swap and whether or not I can just switch the pins in the wiring harness for the injectors when I switch the plug wires? If this is possible, and it should be, does anyone know how to depin the Delphi connector?

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                      • #12
                        i watched a few videos on youtube , the best came from speed academy it shows what tool to use but there is two versions of EV1 connectors, i couldn't do it right no matter how i tried...best of luck to you. i ended up cutting the ends up to splice to EV6 connector for a different set of injectors...

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                        • #13
                          I'm with above.
                          Usually heatshrink butt connectors will fix most jobs.

                          If you post a picture of said connector. I should have one to disassemble, and post information about it's disassembly.
                          "Do you know how whipped an engine has to be to blow that loud?"....Bug from the movie Uncle Buck
                          https://forums.edelbrock.com/filedat...?photoid=42773

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