Results 1 to 6 of 6
  1. #1
    pro12,txi,msx140 SMOKEWAGON's Avatar
    Join Date
    May 2007
    Location
    North Carolina
    Posts
    319

    04 msx 140 got towed home

    Hulkers I need help !

    Last weekend we were riding and after stopping for a beverage my ski
    would not restart, it would crank over well and start to run but about the
    time I let off the green start button it wolud quit running, same thing over and over, start but die a second later. At home in the garage I can get it
    to run if I slightly pump the throttle while cranking, it then runs just fine.
    What would make it need that on a EFI ski?

    Here is what I checked so far:

    2 different fresh agm batteries
    12.8 v setting
    11.4 v cranking
    13.9 v running
    Spark plugs look good
    Compression 125 psi m,c,p
    Fuel pressure 21 psi
    Swapped out TPS for a new one
    30 hous on the ticker, clean and never touched

    Smoke,

    ps Just to let you know, the other ski that towed me back was also a
    Polaris !! I still have my morals !!


  2. #2
    ph2ocraft's Avatar
    Join Date
    Apr 2006
    Location
    Campbell, Ca.
    Posts
    14,100
    +1
    105
    Cherck fuel pressure first.
    Do you have an in-line spark tester where you can verify spark?

  3. #3
    800AMSOIL4U's Avatar
    Join Date
    Aug 2006
    Location
    Morgan Hill, CA
    Posts
    5,024
    +1
    132
    Quote Originally Posted by SMOKEWAGON View Post
    Hulkers I need help !

    Last weekend we were riding and after stopping for a beverage my ski
    would not restart, it would crank over well and start to run but about the
    time I let off the green start button it wolud quit running, same thing over and over, start but die a second later. At home in the garage I can get it
    to run if I slightly pump the throttle while cranking, it then runs just fine.
    What would make it need that on a EFI ski?

    Here is what I checked so far:

    2 different fresh agm batteries
    12.8 v setting
    11.4 v cranking
    13.9 v running
    Spark plugs look good
    Compression 125 psi m,c,p
    Fuel pressure 21 psi
    Swapped out TPS for a new one
    30 hous on the ticker, clean and never touched

    Smoke,

    ps Just to let you know, the other ski that towed me back was also a
    Polaris !! I still have my morals !!

    Make sure you did not get any water in the engine when you were towed back.

  4. #4
    Click avatar for tech links/info, donation request K447's Avatar
    Join Date
    Jul 2007
    Location
    near Toronto, Canada
    Posts
    36,584
    +1
    1,272
    Injector voltages?
    Check during cranking, idle, and revving over 2,000RPM?

    Might be the stator is not putting out enough injector voltage, and cranking in the water just doesn't have enough RPM to get the stator AC voltage up, while on land the crank RPM is higher, especially with the throttle plates open

  5. #5
    pro12,txi,msx140 SMOKEWAGON's Avatar
    Join Date
    May 2007
    Location
    North Carolina
    Posts
    319
    Fuel pressure is at 21 psi running.
    No I do not have a inline spark tester, where is the best place to buy one?

    No water in engine, I clamped the hose.

    When checking injector voltage, where is the best place to tap in?
    Just use needle tips and poke through the inslating rubber?


    Just a side note, have any of you all started a ski in the dark with the seat off, sure is easy to see stray voltage, the msx has a few spots but
    my 2001 txi has blue fire all over, never sticking my hands in there again while running. What is the best way to dampen that sht?

  6. #6
    Click avatar for tech links/info, donation request K447's Avatar
    Join Date
    Jul 2007
    Location
    near Toronto, Canada
    Posts
    36,584
    +1
    1,272
    Quote Originally Posted by SMOKEWAGON View Post
    ...When checking injector voltage, where is the best place to tap in?
    Just use needle tips and poke through the insulating rubber?
    There doesn't seem to be a convenient place to check the injector voltage. You can unplug and partially disassemble one of the injector harness connectors, then slide the connector body back so you can get at the Red/White wire contact. The negative meter probe can just be grounded.

    If you do pierce the wire insulation, be sure to put some goop on afterwards to keep moisture out of the core.

    Just a side note, have any of you all started a ski in the dark with the seat off, sure is easy to see stray voltage, the MSX has a few spots but my 2001 TXi has blue fire all over, never sticking my hands in there again while running.
    What is the best way to dampen that ****?
    Where exactly are you seeing this 'blue fire'?
    Along the spark plug cables? Around the plugs? Around the coils?
    Along the wires from the EMM to the coils?

    The blue glow might be corona discharge, rather than actual spark arcing.

    Perhaps the rubber boots and cables are dirty on the outside and inside the ends. If the surface contaminants are slightly conductive (dirty & damp), then electricity from the coil and spark plug caps can work itself around the boot ends and along the outsides.

    You could try removing the plug wires and carefully cleaning the boots and cable surfaces, then spraying them with a non-conductive drying spray. Nyogel type dielectric grease should be applied on the inside rim of each boot, both plug and coil ends. Keeps moisture out, and the spark energy in.

    A picture of the blue fire would be cool, if you could figure out a way to take one. I don't have a really dark place where I can run my own motors at night.

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. MSX 140 HO limp-home mode?
    By gbailey911 in forum MSX/Matrix
    Replies: 2
    Last Post: 06-16-2011, 09:26 PM
  2. Parting out 04 MSX 140
    By american musclecraft in forum Polaris Classifieds
    Replies: 19
    Last Post: 07-04-2010, 01:43 PM
  3. PROS and CONS 03 & 04 MSX 140
    By Marineking in forum Polaris Open Discussion
    Replies: 1
    Last Post: 05-15-2009, 07:01 PM
  4. 04 msx 140 dead spot
    By american musclecraft in forum MSX/Matrix
    Replies: 4
    Last Post: 05-08-2009, 09:04 AM
  5. Polaris 04 MSX 140 Matrix 68.2 MPH
    By 800AMSOIL4U in forum MSX/Matrix
    Replies: 12
    Last Post: 03-28-2007, 09:15 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •