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Thread: 2004 msx140

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    2004 msx140

    I have a Polaris MSX140 that is not firing on no 3 spark plugs. I sent off ecm to a place in Alabama they tested and sent board back all was good! Any ideas on what I can check to see why its not firing so I can get my son off my back! Lol all comments would help thanks a lot!!


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    Quote Originally Posted by Srevell View Post
    I have a Polaris MSX140 that is not firing on no 3 spark plugs. I sent off ecm to a place in Alabama they tested and sent board back all was good! Any ideas on what I can check to see why its not firing so I can get my son off my back! Lol all comments would help thanks a lot!!
    Did you mean that it is not firing on all three spark plugs, or is not firing on the #3 spark plug?

    If the EMM is good, I'd check the spark plug wires, and the ignition coil wires on all the coil packs for damage, may as well do an ohm check on all those to make sure the wires are still good. If the wires check out I'd look at the ignition coil packs next.

    Do you have the correct spark plugs installed? There is a specific model of spark plug to be used, with NO substitutions. Are the plugs worn or fouled? A severely fouled spark plug may not be able to get sufficient spark to ignite the fuel/air mixture.

    Start there if you have already verified that the EMM is good.

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