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  1. #1
    diamondwatercraft's Avatar
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    P0351 and P0352 fault

    2003 GTX DI This fault by definition is a Open or short circuit on ignition primary circuit.

    Anyone have any luck with replacing the coils or am I in for a new mpem?

    Going to look for a bad ground. I just replaced the engine and I am concerned that this may be the reason the engine lost compression and I don't want to toast this one. I may have forgot a ground but I do remember the large bolt on the bottom and the small one in the same general location. Are there anymore I may have forgot to connect?

    Sorry lots of questions going through my head and trying to find solutions.
    Last edited by diamondwatercraft; 05-26-2014 at 09:00 PM.


  2. #2
    diamondwatercraft's Avatar
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    Cleaned the ground cable along with the battery cable. Started right up! I ran it on the hose for 10 min no codes no issues. Lake test to follow.

  3. #3
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    Lake test proved to be the same. As soon as it hits the water nothing! The engine shuts right down and wont restart. I ran the fault codes and again P0351 and P0352. I have a ground problem so I changed out the battery with a new one and no change. The next thing I did was run a ground wire from the negative battery post to a bolt on the mag cover. Started up!

    I think I have a ground issue but cannot find it. DUH! I have cleaned and re-attached the two ground wires at the port side of the rear of the engine. (large one on bottom and small one on the side) Do I have another one that I did not connect during the engine swap?

    Looking for schematics now.

  4. #4
    diamondwatercraft's Avatar
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    Went to the lake after running a jumper wire from the coil ground to the negative battery cable. No new coil faults. I did get the machine to run after it entered the water. But, after it hit the water 20-30 seconds later it died again.
    The candoo revealed a P0460 fault. Fuel sensor out of range.
    Next step is to test the fuel pressure.
    My theory is that the fuel pump is working hard trying to create pressure for the fuel rail and either the pump, the tank filter, or the inline filter is plugged.

  5. #5
    diamondwatercraft's Avatar
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    Fuel pressure right to the spec. 27 lbs at the des plug in and 105 or so on start up. I am really scratching my head now!

  6. #6

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    Saw the post in classifieds. You giving up on her?

  7. #7
    diamondwatercraft's Avatar
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    As of now yes. I am just afraid of chasing my tail all summer.

  8. #8
    diamondwatercraft's Avatar
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    I may regret this but I decided to try something.

    After thinkin about what was going on I decided to investigate the possibility that the coil faults were because the fuel pump was working to hard. (plugged filters are common on these DI's) Even though the fuel pressure checked out on the trailer,when adding the load to the machine (dropping it in the water) it demanded the pump work harder to compensate. When that happened the pump looked for more power and robbed the ground from the coils since they are they draw the most power from the system. Thats why when I hooked the jumper to the negative battery post I did not have any more coil faults but the machine still ran for 30 seconds or so.

    So pulled the pump here is what I found.Click image for larger version. 

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    New pump and filters ordered. More to come.

  9. #9
    diamondwatercraft's Avatar
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    New inline filter.
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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  10. #10
    diamondwatercraft's Avatar
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    Installed ran to the lake to test.

    Engine will idle but not accelerate past 2700 rpm. No faults and the fuel pressure is at spec.

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