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VP 2006 5.7L GXI cranks but no start

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  • VP 2006 5.7L GXI cranks but no start


  • #2
    none at the ignition module or coil
    Power to the ECM, coil comes from the main power relay. If you have no power to the coil then trace back to the relay
    94 Formula 27PC Custom 509MPI MEFI3 , B3 XR
    95 Rinker 232 w/ 7.4L Carb 0F425011 B1 0F486471
    07 SeaDoo GTX
    Raw Water Pump Maintenance
    Merc Adults Only
    G-Dad always said "First Liar doesn't stand a chance"

    Comment


    • #3
      Thanks AllDodge. If memory serves me correctly it will be in the main wiring harness behind the engine. Might be a few days to have enough time to tear into it. Not the easiest item to reach on my particular craft...

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      • #4
        I wouldn't get into the main harness yet. Go to the relays, find the main power and fuel pump relays. Check that there is power on one side (should be Red wire) with key off. With Key ON the relay should energize and send power to coil and ECM. Don't have a good wiring diagram for the GXI but other EFI models use a Pink wire which powers the ECM and coil
        94 Formula 27PC Custom 509MPI MEFI3 , B3 XR
        95 Rinker 232 w/ 7.4L Carb 0F425011 B1 0F486471
        07 SeaDoo GTX
        Raw Water Pump Maintenance
        Merc Adults Only
        G-Dad always said "First Liar doesn't stand a chance"

        Comment


        • #5
          Check the grounds on the engine, and make sure they are shinny clean and tight. They are often overlooked, and could be an easy fix. Same for the battery connections. Bad grounds will give you all the symptoms you are describing. Dave-R

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          • #6
            Appreciate the inputs! Yeah a lot of folks skimp on the 'ground' wires--can't do that on a boat. Just as important as the wires/connections that carry the load. This is my end of the year week at work, so overtime and possible weekend work--will try to implement the solutions above as soon as I can.

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            • #7
              Finally had time to start examining the wiring harness between the "fuse and relay box" and the ignition module, coil and cam sensor today. I noticed that with key on / battery on, I could duplicate the previous symptoms of fuel pumps on/off, starter bump, relays on/off, etc. Could not find a problem with those wires which actually went to the "14 pin connector". I also noticed that when moving the aforementioned bundle the crank sensor wiring was also being moved. Since I had previously found a bad section of wire in that harness, I didn't expect to find ANOTHER bad spot, but sure enough --two wires were separated/barely connected.

              Repaired that problem, and now have a RUNNING VP. Water is too choppy today for water test, but will be done at first opportunity. The more I look at this boat, the more I am convinced it had a fire and was possibly flooded--due to the number of corroded connectors--and that was on a boat with only "60" hours--verified by my Diacom. Now only has about 90 hours and I have owned for 3.5 years. That is how little use it has gotten due to one problem after another... next boat will be checked by a certified marine inspector...
              Last edited by kdxhx; October 1st, 2017, 12:49 PM.

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              • #8
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                94 Formula 27PC Custom 509MPI MEFI3 , B3 XR
                95 Rinker 232 w/ 7.4L Carb 0F425011 B1 0F486471
                07 SeaDoo GTX
                Raw Water Pump Maintenance
                Merc Adults Only
                G-Dad always said "First Liar doesn't stand a chance"

                Comment

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