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  1. M

    2019 5.7 MPI misfire issue

    After rebuilding my engine I keep getting a trouble code for misfire cylinder 1. The engine will go into guardian mode and not go above 2700rpm. This has happened 3-4 times since the rebuild. I have replaced the plug wire, and the spark plug. Once I clear the code the engine will run fine for...
  2. M

    Loss of Power

    So after 7months of not fishing and completing my engine rebuild I have run into a problem. The engine is a marine power 5.7 mpi. I got 2 trips out on my rebuilt motor and have a problem I and my mechanic can not diagnose. On my last trip out I was running at about 3700rpm for about 15 minutes...
  3. M

    Rebuilt engine wont start

    I just got done rebuilding my engine and it wont fire. The engine is a 2014 Marine Power 5.7 MPI paired with a volvo SX-M duoprop outdrive. The start engages the motor turns over but wont fire. It has spark and fuel. I hooked up the diagnostic computer and it did throw one code for Electronic...
  4. M

    Stalling problems

    I am having a problem with my 2015 5.7 fuel injected engine. It stalled while under way and would not restart. I have had mechanic try and diagnose issue and there appears to be something wrong with ECM. I have power into ECM but no power to fuel injectors. After 4 weeks of back and forth...
  5. M

    Throttle Problems with a 2015 5.7MPI engine

    I have been having some throttle problems with my 5.7 multipoint injection engine. The engine runs fine up to about 3300 and when throttle is increased beyond that range I get no immediate response from engine then suddenly the engine will race up to about 4000rpm. I can not stop the rapid...
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