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  1. K

    5.7 MPI Misfires Under Load

    sold the boat at a deep discount. thanks...
  2. K

    5.7 MPI Misfires Under Load

    I'll be out there this weekend to get the ecm info. Any luck on reading the diacom files? thanks again
  3. K

    5.7 MPI Misfires Under Load

    Unfortunately, I think I can only post snips from Diacom IBOATS does not allow .rec file extensions. Unless someone can help there also!
  4. K

    5.7 MPI Misfires Under Load

    Thanks. Unfortunately, my Diacom was rented and had to be returned after a week. Currently I only have the (4) recordings and error export
  5. K

    5.7 MPI Misfires Under Load

    can someone read/interpret my rinda recordings? I can send via e-mail. misfire under load. 2003 350 MPI
  6. K

    5.7 MPI Misfires Under Load

    Could this be a misfire/pop
  7. K

    5.7 MPI Misfires Under Load

  8. K

    5.7 MPI Misfires Under Load

    Thanks. Just ordered a new IAC. Probably get it installed tomorrow and take another run at it. What are your thoughts on the sensor power chart? Normal?
  9. K

    5.7 MPI Misfires Under Load

    thanks! fuel pressure is in spec 42psi at 1800+. Timing is set to #8 on the distrib and then controlled by the cam pos sensor. this has been a real head scratcher!!
  10. K

    5.7 MPI Misfires Under Load

    another sampling. thanks
  11. K

    5.7 MPI Misfires Under Load

    Thanks. Not sure on the compression gauge. Its new. However, Fuel Pressure 42psi @ 1800 under load
  12. K

    5.7 MPI Misfires Under Load

    thanks! TPS info. Does the sensor power look normal?
  13. K

    5.7 MPI Misfires Under Load

    Sorry. Does this graph look normal?
  14. K

    5.7 MPI Misfires Under Load

  15. K

    5.7 MPI Misfires Under Load

    thanks! Specifics: Compression 158-160 Fuel Pressure 41psi Vacuum 19 and steady at idle Oil Pressure 60 psi New cap, rotor, plugs, wires, fuel/water filter, and oil change. Rinda OBD: No DTC's
  16. K

    5.7 MPI Misfires Under Load

    2003 350MPI ECM555. Backfire through intake under load. Diacom Rinda readings for IAC duty cycle of mid 90% at 3500rpm? Should be 0%? 40% at idle?
  17. K

    5.7 MPI Misfires Under Load

    Thanks. I was just reviewing some of the rinda recorded data and read a few places that the IAC should be 0% at high rpm. Just couldn't confirm. Was able to test the regulator and fuel pressure under load. All are good 42 no vacuum, 38 w/vacuum, and 42 under load. Yup. Found in service manual...
  18. K

    5.7 MPI Misfires Under Load

    Diacom Rinda readings for IAC duty cycle of mid 90% at 3500rpm? Should be 0%? 40% at idle?
  19. K

    5.7 MPI Misfires Under Load

    question. what % should the IAC duty cycle be at higher RPM or WOT?
  20. K

    5.7 MPI Misfires Under Load

    Update. Fuel pressure 42psi under load. Still popping. sounds like through the intake
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