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Back fire out the ehaust Mopar Pro flo 4

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  • Back fire out the ehaust Mopar Pro flo 4

    I have a 416 Mopar. im running 42# injectors. I am getting backfire out the exhaust and it lacks power on take off compared to the carb that I took off. I have included a video.
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  • #2
    fuel pressure seams high . isn't the set p.s.i 58. ?

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    • #3
      I seen that, I don't think that would cause the miss though. Im running a intank fuel pump and a holley fuel regulator. The reg is supposed to be pre set at 58 but guess not.

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      • #4
        Does it run better if you clear self learn?
        In my neighborhood, if you open your hood to check your oil, and the vehicle still runs after you close it.......Then your labeled the Neighborhood Mechanic.
        https://forums.edelbrock.com/filedat...?photoid=42773

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        • #5
          I haven't tried that yet

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          • #6
            If it runs the same, after it relearns. You could raise the "Decel Fuel Cut RPM".....But give the system some time to learn first.
            In my neighborhood, if you open your hood to check your oil, and the vehicle still runs after you close it.......Then your labeled the Neighborhood Mechanic.
            https://forums.edelbrock.com/filedat...?photoid=42773

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            • #7
              What MAP # do you have loaded ?
              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
                5031_v65 map is loaded

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                • #9
                  5031 MAP is correct for 42lb injectors.

                  Call Tech line @ 800-418-8628

                  & we can go over the tablet settings/ real time data.
                  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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                  • #10
                    ok, sounds good

                    thanks

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                    • #11
                      I ended up leaving a call back number

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                      • #12
                        well it was running good, when I shut it off somehow it didn't retain the settings.


                        Idle spark is at 15.25, advance start rpm is at 1200, total spark is at 36, and total spark rpm is 3000

                        I know these were not the numbers you gave me. somehow they didn't save. it was running good though.

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                        • #13
                          I set total spark at 30 again and rpm at 1500. seems to run good

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                          • #14
                            davecregar So did you get everything worked out? It does sound pretty nice! Gotta love that Mopar sound!

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                            • #15
                              What was the issue here? Mine runs good but anything over 18 total timing, I go way down on power and get popping out of the exhaust. I’ve made sure I’m synced properly with a Snap On light.

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