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F300 Cylinder #2 Issues

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  • F300 Cylinder #2 Issues

    Hi Guys, first time Poster long time reader.

    Have a few issues with my 2014 F300, 4.2L offshore. Currently close to 800 Hours.

    Cylinder #2 i noticed has been running a little lean (White deposits on spark plug and dirty top of piston). Also getting slight smoke/fuel smell on startup.

    i have ran on the YDIS Software as attached.

    Cleared the following Codes from 500 odd hours. Cam Position sensors (Both) and TPS sensor. Cleared and they didn't return.
    Item Occurred Code
    Electronic throttle system 509.6 144
    Cam position sensor(STBD INT) 509.6 71
    Cam position sensor(PORT INT) 509.6 72
    Cleared these codes. Also found the following parameters after running for a short period (As Per Procedure in Yam Manual for checking TPS) - note the TPS value exceeds Parameters 0.37-0.63v as per manual.
    Tropical conditions, 30deg Celsius day, 80% humidity.
    Monitor Item (DATA) Result Unit
    Engine speed 0 r/min
    Intake pressure 99.62 kPa
    Intake pressure 29.49 inHg
    Throttle position sensor(main) 0.688 V
    Throttle valve opening (0-90) 4 deg
    Throttle position sensor(sub) 2.646 V
    Throttle request 0 %
    LPS(main) 2.285 V
    LPS(sub) 2.231 V
    Active Remote Control 1P
    Shift position sensor(main) 2.505 V
    Shift position sensor(sub) 2.524 V
    Shift request 0 %
    Atmospheric pressure 996.2 hPa
    Atmospheric pressure 29.5 inHg
    Battery voltage (12-16) 13 V
    Fuel injection duration 0 ms
    Ignition timing - deg
    Engine temperature (below 150) 70.7 °C
    Engine temperature (below 302) 159.3 °F
    Intake temperature 50.7 °C
    Intake temperature 122.9 °F
    Oil pressure 3.8 kPa
    Oil Pressure 0.6 psi
    Intake cam timing (STBD) - deg
    Intake cam timing (PORT) - deg
    Coolant Pressure 602.9 kPa
    Coolant Pressure 87.4 psi
    Speed (blocked pickup) 156.2 km/h
    Speed 97.1 mph

    Is there something I've missed? im a bit of a particular boat owner/mechanic and do long trips in remote areas with the boat. Also a trade qualified outboard/small engine mechanic, however been 10 years from being in the ****.

    The 700 hour service included the following changed out.

    - All new anodes, block, head and water jackets
    - timing belt changed, all pulleys also changed, tensioner replaced (old superseded tensioner).
    - Plugs & Compression test - all within 5psi - to workshop spec PSI.
    - Overhaul of Trim tilt system back to pump and refreshed with ATF.
    - VST removed and overhauled, all new gaskets, pump tested, filters changed.
    - Injectors ultrasonically cleaned and tested.

    Maybe I've missed something obvious, maybe not, motor still runs without any noticeable issues, just better to pick up these types of things early.

    Cheers
    Blue Label.

  • #2
    no help from me, but deposits on plug could mean water being burned

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