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  1. #1

    injectors low voltage

    2000 genesis , 10.6 volts on white/red wire to injectors. battery at 13V. any other probable causes beside EMM? also does this have LR Module?


  2. #2
    martincom's Avatar
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    Just to make sure we're singing from the same sheet of music, you had your meter set for DC volts when measuring at the white/red wire?

    Yes, your issue could be in the EMM or it could be the stator or flywheel. As to the engine running, the battery voltage is only relevant to how fast the starter motor can turn the engine over and powering the fuel pump. The ignition and fuel injection components of the EMM control portion are supplied from rectified DC voltages generated by the stator coil and rectified/filtered by the power board of the EMM.

    So you'll want to check the stator sections for continuity and each section for its AC output voltage. Check here for detailed information as to how. If the continuity of each stator section is OK, but the AC voltage low, one or two flywheel magnets have likely dislodged. If the AC voltage is OK from each stator section, you likely have an EMM power board issue.

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  4. #3
    same song sheet but I am in the back . yes DC volts. now what I discovered was that with lanyard in 10.6 ...doesnt stay steady ....lanyard out and cranking voltage 25 plus.

  5. #4
    Moderator HiPeRcO's Avatar
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    Check stator AC volts while cranking on all 5 winding pairs (as Martincom has suggested), it's the best test to gauge stator/flywheel health.

  6. #5
    Hey Martin , I completed a stator test. I viewed the recommended values I should see and I have two voltages @8.3 and three voltages at 5.4v. but I am a little confused at all ohms readings were the same at 0.8 ?

  7. #6
    martincom's Avatar
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    Your stator and flywheel magnets are fine. It takes a pretty high end ohm meter to accurately measure with a resolution in the tenth of ohms.

    If you have access to another EMM, you can connect it's power board (the smaller two connectors) and leave the large 40in connector connected to the original EMM. If it runs, this confirms the original EMM's power board is malfunctioning. That being said, I'm 90% confident you have an EMM power board issue

    I'd suggest reaching out to HiPeRcO (dba: Lakeside Tech) He'll not just repair/replace the defective components, but replace all the components known to fail with age/temp on both the power board and the control board.

  8. #7
    I agree EMM is at fault .but now discovered another issue. while reading post here about checking stator it mentions checking Ficht coils to make sure that none of the coils have any connection to engine ground, and sure enough pins 11 and 2 show a resistance and continuity between either one and engine ground?

  9. #8
    This is how I run a jetski shop in the desert nmpeter's Avatar
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    Quote Originally Posted by perry38 View Post
    I agree EMM is at fault .but now discovered another issue. while reading post here about checking stator it mentions checking Ficht coils to make sure that none of the coils have any connection to engine ground, and sure enough pins 11 and 2 show a resistance and continuity between either one and engine ground?

    the field test is to unplug one injector and see if you get an engine start. only crank for 5 seconds max.

    if the engine starts, without doubt the emm needs repair

  10. #9
    Click avatar for tech links/info K447's Avatar
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    Quote Originally Posted by perry38 View Post
    ... checking Ficht coils to make sure that none of the coils have any connection to engine ground, and sure enough pins 11 and 2 show a resistance and continuity between either one and engine ground?
    How much resistance?

    If very high ohms (hundreds of KILO ohms or greater) then it may just be the ohm meter reading your fingers touching the probes.

  11. #10
    Quote Originally Posted by nmpeter View Post
    the field test is to unplug one injector and see if you get an engine start. only crank for 5 seconds max.

    if the engine starts, without doubt the emm needs repair
    I have unplugged one injector ...no go. I have dribbled fuel into throttle body ... never attempted . 3 plugs have good fire.

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