Edelbrock Pro Flo 4 EFI

Fuel and Air Systems

  1. Heywodja

    Heywodja The Heartbeat Stops Here. FABO Gold Member

    Messages:
    482
    Likes Received:
    131
    Joined:
    Aug 16, 2014
    Location:
    Texas
    Local Time:
    6:37 PM
    I look at it kinda like a transmission rebuild kit.. :Lots of companies sell them and give out info to assist, but if you really want it to work right you need someone who really knows how the whole system works in the real world applications..
     
  2. Mopar73340

    Mopar73340 Well-Known Member

    Messages:
    94
    Likes Received:
    53
    Joined:
    Jan 10, 2009
    Location:
    Northern VA
    Local Time:
    7:37 PM
    let me elaborate a little further. Yes I’ve got the system to work. Is it perfect no but I do expect once I finish tweeking and get some more miles on it that it will be better than the carb it replaced for a driver. Let’s face it most of us are gear heads and enjoy tweeking our cars. Most of my technical questions to tech support are answered by saying try it and see what happens. Duh, I already know I could do that but was expecting a little insight as to how the system works which is lacking in the instructions. I also understand all combinations are different and wasn’t expecting a set in stone answer just something to give me some insight and point me in the right direction.

    Another issue is I don’t believe they thought the system out before production. Example, the throttle shaft should accept the carb linkage adapters for Chrysler and Fords as these are already available and would make it better to fit their motto as “ready to run out of the box”
     
    Last edited: Jan 4, 2020
  3. GMachineDartGT

    GMachineDartGT Senior Member

    Messages:
    1,592
    Likes Received:
    247
    Joined:
    May 9, 2006
    Location:
    Huntington, NY
    Local Time:
    7:37 PM
    What’s the problem?
     
  4. Mopar73340

    Mopar73340 Well-Known Member

    Messages:
    94
    Likes Received:
    53
    Joined:
    Jan 10, 2009
    Location:
    Northern VA
    Local Time:
    7:37 PM
    I believe there should be some technical information or instructions provided if asked for to explain system parameters and how the settings change said parameters. There are multiple parameters to set but no explanation of how exactly they affect the system.
     
  5. GMachineDartGT

    GMachineDartGT Senior Member

    Messages:
    1,592
    Likes Received:
    247
    Joined:
    May 9, 2006
    Location:
    Huntington, NY
    Local Time:
    7:37 PM
    ok, I understand that part. What was your problem?
     
  6. Mopar73340

    Mopar73340 Well-Known Member

    Messages:
    94
    Likes Received:
    53
    Joined:
    Jan 10, 2009
    Location:
    Northern VA
    Local Time:
    7:37 PM
    We had issues trying to get my buddies Pro Flo 3 to start. That’s where the issue with voltage started.

    Personally on my two systems, a 3 and a 4, I would like to understand the timing parameters, vacuum advance included and fuel modifications. I’ve figured most of them out now via trial and error.
     
    Last edited: Jan 4, 2020
  7. GMachineDartGT

    GMachineDartGT Senior Member

    Messages:
    1,592
    Likes Received:
    247
    Joined:
    May 9, 2006
    Location:
    Huntington, NY
    Local Time:
    7:37 PM
    These sound like general questions that aren’t related to efi. I needed engine dyno time to figure out my optimum total timing is 30 degrees.
     
  8. Mopar73340

    Mopar73340 Well-Known Member

    Messages:
    94
    Likes Received:
    53
    Joined:
    Jan 10, 2009
    Location:
    Northern VA
    Local Time:
    7:37 PM
    Well I suppose that’s your opinion but if the ECU is controlling timing and air fuel ratios then I want to understand how the changes in the tablet affect the system both timing management and fuel management. I’m not referring to how these changes affect the engine function.
     
  9. abodyjoe

    abodyjoe Well-Known Member

    Messages:
    20,339
    Likes Received:
    5249
    Joined:
    May 22, 2004
    Location:
    Berlin,N.J. 08009
    Local Time:
    7:37 PM
    • Thanks! Thanks! x 1
    • GMachineDartGT

      GMachineDartGT Senior Member

      Messages:
      1,592
      Likes Received:
      247
      Joined:
      May 9, 2006
      Location:
      Huntington, NY
      Local Time:
      7:37 PM
      There are a lot of parts out there that require a degree of knowledge as a base before installing. Understand that because they market a system doesn't mean they are bound to training the customer on EFI. That's why there are pros. The reality is this hobby is filled with people that have no business turning wrenches. Its just the nature of the beast unfortunately.
       
      • Like Like x 1
      • Dusterfreak

        Dusterfreak Well-Known Member

        Messages:
        170
        Likes Received:
        73
        Joined:
        Aug 29, 2010
        Location:
        Finland
        Local Time:
        12:37 AM
        Got mine running at last.
         
        • Like Like x 8
        • Cal Tonsley

          Cal Tonsley Well-Known Member

          Messages:
          134
          Likes Received:
          201
          Joined:
          Mar 11, 2017
          Location:
          Australia
          Local Time:
          10:07 AM
          Great stuff, well done, just wondering what cam is this running, how much vacuum do you have at idle?
           
        • Dusterfreak

          Dusterfreak Well-Known Member

          Messages:
          170
          Likes Received:
          73
          Joined:
          Aug 29, 2010
          Location:
          Finland
          Local Time:
          12:37 AM
          • Like Like x 1
          • Thanks! Thanks! x 1
          • Dusterfreak

            Dusterfreak Well-Known Member

            Messages:
            170
            Likes Received:
            73
            Joined:
            Aug 29, 2010
            Location:
            Finland
            Local Time:
            12:37 AM
            Anyone had this: Afr says 10 all the time, so basically it means that the sensor doesnt read. Did I soak it at some point? Is it ruined for good?
             
          • Dusterfreak

            Dusterfreak Well-Known Member

            Messages:
            170
            Likes Received:
            73
            Joined:
            Aug 29, 2010
            Location:
            Finland
            Local Time:
            12:37 AM
            Update: it does measure but it runs so rich that gas is flowing from the pipes and I cant get it leaner.
             
          • Mopar73340

            Mopar73340 Well-Known Member

            Messages:
            94
            Likes Received:
            53
            Joined:
            Jan 10, 2009
            Location:
            Northern VA
            Local Time:
            7:37 PM
            It’s telling you -10 on the short fuel trim? Is this just at idle? If so you can go into advanced tuning and subtract fuel from idle, cruise, or wot. Are you sure your running the correct map? I have had better luck selecting the map based on vacuum numbers at idle than based on cam duration numbers. There is a chart at the back of the install instructions that lists map #’s and vacuum range along with duration.
             
          • Mopar73340

            Mopar73340 Well-Known Member

            Messages:
            94
            Likes Received:
            53
            Joined:
            Jan 10, 2009
            Location:
            Northern VA
            Local Time:
            7:37 PM
            Ok after re reading your post your saying the afr is 10? What is the target AFR?
             
          • Dusterfreak

            Dusterfreak Well-Known Member

            Messages:
            170
            Likes Received:
            73
            Joined:
            Aug 29, 2010
            Location:
            Finland
            Local Time:
            12:37 AM
            Yes the AFR was 10 and that means its not doing anything. Target idle afr is 13.9 and its running far from that, 11-12.5 and thats soaking the engine in gas. How fast should it adjust?
             
          • Mopar73340

            Mopar73340 Well-Known Member

            Messages:
            94
            Likes Received:
            53
            Joined:
            Jan 10, 2009
            Location:
            Northern VA
            Local Time:
            7:37 PM
            I’m not sure what is going on. You say it’s running at 10 then you say 11-12.5?!? If target is 13.9 it should be learning and subtracting fuel. This only happens in closed loop after temp reaches 170*. You can also go into the cold start/fuel modifiers and subtract fuel. Is it warmed up when this happens or cold? Can you take a picture of the tablet while it’s running?
             
          • gzig5

            gzig5 Well-Known Member

            Messages:
            1,005
            Likes Received:
            953
            Joined:
            May 3, 2018
            Location:
            Mequon, WI
            Local Time:
            6:37 PM
            If that's true, you are probably washing down the cylinder walls and diluting the oil. Might want to change the oil and keep and eye on it until you get it leaned out or you may have a complete overhaul in the near future.
             
          • Dusterfreak

            Dusterfreak Well-Known Member

            Messages:
            170
            Likes Received:
            73
            Joined:
            Aug 29, 2010
            Location:
            Finland
            Local Time:
            12:37 AM
            Long story short: Engine had total rebuild and the video above was from the setup wizard warm up. Yesterday I tried to warm it up so I could change the oil and check that everything is good, leaks etc. I had massive trouble getting it to start at all, I had to add crank fuel 7% to get it running. And when it fired up, the AFR reading was 10 for about 15 seconds and then slowly leaned down a little but at that point, I could smell, see and feel the gas literally draining from the pipes. Also it didnt keep running unless I opened the throttle a little. How the hell is it that rich but still didnt want to fire at first before i added crank fuel? Next time when I start it, do I have to just wait until its at 170 and see if it leans to target?
            Yeah, the engine had a total rebuild and that was third time it was running. I all ready drained the oil, there was little bit of oil in the gasoline I might say. :p I didnt drive it since the rear axle is in overhaul... Goal was only to warm it up so I can change the oil.
             
            Last edited: Mar 15, 2020
          • Mopar73340

            Mopar73340 Well-Known Member

            Messages:
            94
            Likes Received:
            53
            Joined:
            Jan 10, 2009
            Location:
            Northern VA
            Local Time:
            7:37 PM
            Unfortunately it’s really difficult to diagnose over the internet. It doesn’t sound to bad in the video posted above. First thing I would do is make sure you have the correct map loaded for your engine. Start over and re load map again. If still rich at idle open advanced tuning and subtract fuel until you get close. Make sure the IAC is adjusted correctly. Get a video or at least a picture of the tablet with the gauges displayed so I can get an idea of what’s happening.
             
            Last edited: Mar 15, 2020
          • Dusterfreak

            Dusterfreak Well-Known Member

            Messages:
            170
            Likes Received:
            73
            Joined:
            Aug 29, 2010
            Location:
            Finland
            Local Time:
            12:37 AM
            Allright! User error, it works after changing spark plugs. Now Ill just have to be paitent and get it on the road for more adjustments.
             
            • Like Like x 3
            • JoesEdge

              JoesEdge FABO Gold Member FABO Gold Member

              Messages:
              1,056
              Likes Received:
              239
              Joined:
              Jun 6, 2013
              Location:
              Downey, CA
              Local Time:
              4:37 PM
              Nice!!! Were the spark plugs really old or something? I hope to see a driving video sometime soon.
               
            • Dusterfreak

              Dusterfreak Well-Known Member

              Messages:
              170
              Likes Received:
              73
              Joined:
              Aug 29, 2010
              Location:
              Finland
              Local Time:
              12:37 AM
              No they were actually brand new, but I soaked them so bad trying to get it running that they didnt fire anymore. I also noticed that I have 35lb/hr injectors but the setup wizard didnt give that option because I gave engine size 318, I had to change it to 340 to get to choose the correct injector. Bet that will cause rich AFR because the smaller injector should be open longer than the bigger.
              Rear axle is still a work in progress.. So hopefully Ill be on the road in couple of weeks. Thanks to corona, I have time to spent in the shop, no where to go except the carage.
               
              • Thanks! Thanks! x 1
              1. This site uses cookies to help personalize content, tailor your experience and to keep you logged in if you register.
                By continuing to use this site, you are consenting to our use of cookies.