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Plugs keep fouling - any thoughts??

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  • #76
    Originally posted by CantRepeat View Post
    I didn't read many of the post but, any codes?
    No codes. Had the dealer hook it up and there were no codes thrown.
    2002, X30, L-18, Red Metal Flake (the possessed boat)

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    • #77
      Originally posted by prostar205 View Post
      No codes. Had the dealer hook it up and there were no codes thrown.
      Several of the sensors can be well out of range and throw no codes.

      Basically if your engine thinks it is 0 degrees when it is 100 degrees its going to run really rich, but since 0 degrees is a value the computer is OK with that will never throw a code.

      If a value is incorrect but inside range no codes ever.

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      • #78
        If you pull your ECT and put it in boiling water you check the ohms to see if it's reading correctly.

        https://teamtalk.mastercraft.com/sho...27&postcount=2
        -Tim

        Making boomers great again!! Boomin'

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        • #79
          Originally posted by CantRepeat View Post
          If you pull your ECT and put it in boiling water you check the ohms to see if it's reading correctly.

          https://teamtalk.mastercraft.com/sho...27&postcount=2
          Is this the ECT sensor? It's not in the intake manifold. This sensor is in the cross over tube (aluminum) coming from the engine water pump.
          Attached Files
          2002, X30, L-18, Red Metal Flake (the possessed boat)

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          • #80
            Originally posted by CantRepeat View Post
            If you pull your ECT and put it in boiling water you check the ohms to see if it's reading correctly.

            https://teamtalk.mastercraft.com/sho...27&postcount=2
            Are these values applicable to the ECT sensor on the 8.1L engine?
            2002, X30, L-18, Red Metal Flake (the possessed boat)

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            • #81
              I see a lot of good recommendations on here. The only for sure way to know what the ECM is seeing from the sensors and what commands it is sending to the Engine is by connecting a Diacom and looking at the data to figure out were the problem is. Here is a Diacom screen shot of my LT1 running to give you a look at what I am talking about.
              Attached Files

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              • #82
                Originally posted by 88 PS190 View Post
                Several of the sensors can be well out of range and throw no codes.

                Basically if your engine thinks it is 0 degrees when it is 100 degrees its going to run really rich, but since 0 degrees is a value the computer is OK with that will never throw a code.

                If a value is incorrect but inside range no codes ever.
                in range failures - at least in my experience - are more rare. not impossible but id say unlikely

                and that still doesnt account for his large cylinder to cylinder variation.

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                • #83
                  check the valve springs on the affected cylinders
                  1981 MasterCraft
                  19' Skier 351W PowerSlot
                  Long gone is the Trans AM waiting for another

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