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    Updated 9/29/20 - Upgrades have been pushed until 10/7/20

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Poor Running - Low WOT

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  • Poor Running - Low WOT

    Hi guys please help. I have 2012 regal 2100 with Volvo penta engine 270 HP the maximum RPM reached 4600 with open wide throttle with and without lower unit gear . I checked Water Temperature normal , oil pump normal and I checked the fuel pump pressure normal 50 PSI. What is the problem please

  • #2
    first, welcome aboard

    im confused, does your engine reach WOT under load, yes or no? because a motor would reach WOT without a load (neutral) with only 1/3 of its cylinders firing.

    since volvo has about 7 engines for 2012 and multiple EFI fuel sytems. the only thing we know is you have 270hp and fuel pressure of 50 psi. so we should guess which engine you are having issues with?

    Cheesehead boating the Gulf Coast of FLA 27.51° N, 82.53° W

    1988 Cruisers Rogue 2420 -VP 290 DP now powered by custom 468 - https://forums.iboats.com/forum/owner...988-rogue-2420

    Past Boats
    1970 Wooster Hellion - Merc 9.8
    2002 SeaRay 190BR - 5.0 - A1G2 - "Cheeseheads in Paradise"
    1984 Avanti 170DLI -3.0 stringer- "Ship Happens"

    What’s behind you doesn’t matter.Enzo Ferrari

    Comment


    • #3
      to iBoats . . .

      Why do you run your engine at high RPM in neutral? If you want to go anywhere, you should put it in gear.

      So, you are saying the engine will reach 4600 in gear as well Sounds OK to me. Since we don't know what engine you have (guessing it might be the 5.7 ) do you know the what the WOT RPM is supposed to be?

      Keep in mind that electronically controlled engines limit the RPM, so folks don't over rev their engines in neutral

      Best regards, Ted . . . . Cape Cod, MA

      Current Boats: Formula 330 SS O'Day Mariner Sail #3224, Sunfish, Boston Whaler 13
      Past Boats: Catalina 22 Sail #10531, Formula 242 SS
      Twin Mercruiser 7.4 LX MPI (0F802036, 039), Bravo 3's (0F806198, 199), Mercury 7.5 HP (1969), Johnson 4.5 HP (1980), Evinrude 25 HP (1992), Yamaha 3 (1990)

      My Boating Web Pages: http://www.tpenfield.com

      Comment


      • #4
        Hey Guys Sorry for the confusing. the problem is i don't know how many RPM my Engine is ? the engine reach 4600 RPM under load, and wen i checked the RPM on natural it reach 4600 RPM too. but i am sure my engine lost RPM because the bout was going 47 MPH with WOT, but now the maximum is 42 MPR with WOT. So i really don't know what happened the water temperature normal and oil pressure normal too.the fuel pressure 50 PSI.

        How can i tell how many RPM my Engine is ? I attached my engine information below. all what i know about the engine is
        5L, V8, 270 HP. is there anyway to get the service manual online or to find how many RPM my Engine is? please help
        Attached Files

        Comment


        • #5
          there is a tachometer on your dash, that should indicate what RPM you are at

          running in neutral means nothing. a V8 can do that with only 2 or 3 cylinders running

          fuel pressure should be 43 psi

          what is compression on all 8 cylinders? should be about 150 psi

          you can get factory manuals from here https://www.volvopenta.com/marinelei...handbooks.html

          you can view scanned copies at sites like boatinfo.no
          Cheesehead boating the Gulf Coast of FLA 27.51° N, 82.53° W

          1988 Cruisers Rogue 2420 -VP 290 DP now powered by custom 468 - https://forums.iboats.com/forum/owner...988-rogue-2420

          Past Boats
          1970 Wooster Hellion - Merc 9.8
          2002 SeaRay 190BR - 5.0 - A1G2 - "Cheeseheads in Paradise"
          1984 Avanti 170DLI -3.0 stringer- "Ship Happens"

          What’s behind you doesn’t matter.Enzo Ferrari

          Comment


          • #6
            Hi Sccot thank you so much for your help. the compensation test For all cylinders between 145-155 PSI it’s on the range . I checked some documents online showing my engine should be 5000 RPM Check it below. Do you think the injectors could make this issue ?

            as I mentioned before the fuel pressure 50 PSI when engine running . But I didn’t check the fuel pressure on WOT, Do I need to do that ?

            https://irp-cdn.multiscreensite.com/...05.0%20DPS.pdf

            Comment


            • #7
              you can pull the injectors out and have them cleaned and tested

              you can plug in Rinda or other software and see the PWM commands for the injectors and do other diagnostic tests.
              Cheesehead boating the Gulf Coast of FLA 27.51° N, 82.53° W

              1988 Cruisers Rogue 2420 -VP 290 DP now powered by custom 468 - https://forums.iboats.com/forum/owner...988-rogue-2420

              Past Boats
              1970 Wooster Hellion - Merc 9.8
              2002 SeaRay 190BR - 5.0 - A1G2 - "Cheeseheads in Paradise"
              1984 Avanti 170DLI -3.0 stringer- "Ship Happens"

              What’s behind you doesn’t matter.Enzo Ferrari

              Comment


              • #8
                Thanks a lot I will clean the injectors first. Can you provide more information about Rinda and pWM . Thanks

                Comment


                • #9
                  This is the manual showing Volvo penta 270 should goes 5000 RPM please correct me if I am wrong

                  https://irp-cdn.multiscreensite.com/...05.0%20DPS.pdf

                  Comment


                  • #10
                    Those spec's are the MAXIMUM engine speed that the engine should be run at (without adverse affects).

                    It does not mean that the engine in your boat will achieve the maximum. Usually there is a range in which the engine is supposed to run, based on size of the boat, gear ratio, propeller pitch, etc.

                    I think the spec'd range for the engine is 4600-5000 RPM . . . Hey guess what, you are achieving that range.
                    Best regards, Ted . . . . Cape Cod, MA

                    Current Boats: Formula 330 SS O'Day Mariner Sail #3224, Sunfish, Boston Whaler 13
                    Past Boats: Catalina 22 Sail #10531, Formula 242 SS
                    Twin Mercruiser 7.4 LX MPI (0F802036, 039), Bravo 3's (0F806198, 199), Mercury 7.5 HP (1969), Johnson 4.5 HP (1980), Evinrude 25 HP (1992), Yamaha 3 (1990)

                    My Boating Web Pages: http://www.tpenfield.com

                    Comment


                    • #11
                      Originally posted by Freeman1982 View Post
                      Thanks a lot I will clean the injectors first. Can you provide more information about Rinda and pWM . Thanks
                      you have google, start doing your own research.
                      Cheesehead boating the Gulf Coast of FLA 27.51° N, 82.53° W

                      1988 Cruisers Rogue 2420 -VP 290 DP now powered by custom 468 - https://forums.iboats.com/forum/owner...988-rogue-2420

                      Past Boats
                      1970 Wooster Hellion - Merc 9.8
                      2002 SeaRay 190BR - 5.0 - A1G2 - "Cheeseheads in Paradise"
                      1984 Avanti 170DLI -3.0 stringer- "Ship Happens"

                      What’s behind you doesn’t matter.Enzo Ferrari

                      Comment


                      • #12
                        Thank you guys appreciate your help

                        Comment


                        • #13
                          Sign up today
                          Hi. So normally I’d just think your 5.0 gxi is hitting the limiter and that’s that. As well as your tachometer being a little off, as they always are. But if you said it used to be quicker before and had lost power...it’s quite obvious that your GXI is likely now in one of the guardian modes they have. Most likely the 90% one. Many things can cause this. Get it plugged in and see.
                          those engines have a range of 4600-5000 rpm and will limit at 5150 rpm exactly.
                          ps. Try not to rev it to those rpm in neutral. Not very good for it.

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