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  1. #1
    Every adventure comes to an end........ Not Today! wreckingball's Avatar
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    WTB emm brain. Virage

    I have a 2002 Polaris virage I with an 800 motor. I need the brain. Does anyone have one for sale?


  2. #2
    Click avatar for tech links/info, donation request K447's Avatar
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    Sometimes the EMM is repairable.

    Do you know what is wrong with yours?

  3. #3
    Every adventure comes to an end........ Not Today! wreckingball's Avatar
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    Quote Originally Posted by K447 View Post
    Sometimes the EMM is repairable.

    Do you know what is wrong with yours?
    I don't know what is wrong with the brain. I just bought the ski today. The person I bought it from said that it quit working on him during a trip to Lake Havasu. He said that a local Polaris shop told him that the brain was faulty and it would cost him 1900 for a new brain, programing and labor.
    That's it. So I'm looking for a brain box.

  4. #4
    Click avatar for tech links/info, donation request K447's Avatar
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    Well, there are more options than just buying a new EMM.

    PartsPitStop lists the 4010408 EMM for $1300
    Babbitts lists the 4010408 EMM for $1122

    Does your EMM still power up internally?
    Just how badly damaged is it?

    A) One option is to have the old EMM repaired. Often they can be fixed.
    At the moment, there is only one place that does this work;
    DFI Technologies - Repair service for Polaris Ficht EMM modules
    Cost is typically under $600, if it can be repaired.

    If you decide against repair, or it is not repairable;
    B) If the old EMM is still partially functional, then you can purchase a used EMM from another Virage i with the two cylinder Ficht engine.

    Then the fuel injector mapping data can be transferred from the old EMM to the replacement. This can be done by a Polaris dealer, or anyone who has the necessary computer gear. DFI may also be able to do this. That would be the 'programming' the dealer mentioned.

    C) Another option is to buy a used EMM plus the matching injectors from another engine. Since the injectors are already matched to the EMM, no programming is required. The replacement injectors and EMM can simply be bolted in.

    Polaris Ficht Fuel Injected Engines

    Having said all that, sometimes the shop diagnosis can be incomplete, or inaccurate, especially if they are not familiar with the Ficht system.

    Can you tell us more details about what the diagnostics were, and why the EMM was fingered as the problem.
    Last edited by K447; 06-25-2010 at 12:43 AM.

  5. #5
    Every adventure comes to an end........ Not Today! wreckingball's Avatar
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    I found a EMM brain for a 2003 800 on eBay. My Virage is a 2002 so I'm hoping it will work. For $420 it's worth a try. And if it does work I'll be open to suggestions on trying to repair the old brain to keep as a spare.

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    Quote Originally Posted by wreckingball View Post
    I found a EMM brain for a 2003 800 on eBay. My Virage is a 2002 so I'm hoping it will work. For $420 it's worth a try. And if it does work I'll be open to suggestions on trying to repair the old brain to keep as a spare.
    you need the injectors to match or you will burn up the motor .
    i would send it to be checked where K447 suggested

  7. #7
    Every adventure comes to an end........ Not Today! wreckingball's Avatar
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    Quote Originally Posted by 785 lugs View Post
    you need the injectors to match or you will burn up the motor .
    i would send it to be checked where K447 suggested
    If the motors are the same, then why wouldn't the mapping be the same?

    Thank you for the advise. I will look to find a dealer that can do the mapping. And into having the old brain repaired as a back up... Well when the budget will allow.

  8. #8

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    Quote Originally Posted by wreckingball View Post
    If the motors are the same, then why wouldn't the mapping be the same?

    Thank you for the advise. I will look to find a dealer that can do the mapping. And into having the old brain repaired as a back up... Well when the budget will allow.
    each computer is matched to the injectors it's using ,now will it really burn up ??? but better safe then sorry .
    Me i a gambler and would go for it whats the worst that could happen

  9. #9
    Every adventure comes to an end........ Not Today! wreckingball's Avatar
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    Quote Originally Posted by 785 lugs View Post
    each computer is matched to the injectors it's using ,now will it really burn up ??? but better safe then sorry .
    Me i a gambler and would go for it whats the worst that could happen
    I'm always afraid to spend more than $20 when I go to casinos, so there is now way I'm good at gambling.

  10. #10
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by wreckingball View Post
    If the motors are the same, then why wouldn't the mapping be the same?...
    Ficht RAM injectors are completely different from normal automotive fuel injectors. Automotive injectors are really just a fuel valve.

    Ficht injectors are actually compact high pressure pumps; each injector is its own pressure pump. When the EMM sends the high power electrical injection pulse to the injector (45 volts), the fuel inside the injector is boosted from the 20+PSI of the fuel pump to well over 200PSI at the injection tip.

    The EMM is mapped to the specific injectors, not the engine.

    Each Ficht injector is flow tested at the factory, and a set of flow compensation values are generated for each particular injector. When the EMM is mated to the injectors during manufacture, the compensation table for each injector is also loaded into the EMM. The EMM uses this flow map data to compensate for differences in the way the injectors flow fuel.

    If you purchase a replacement Ficht injector from Polaris, it comes with a computer disc containing the correct flow compensation numbers for that replacement injector. The injector is installed, and the EMM is updated with the correct injector data.

    It is also possible to copy the existing injector data from an old EMM to a replacement EMM, as long as the old EMM's internal computer is still functioning. Both old and new EMM must be in the same place at the same time, for the data to be transferred from old to new, using a laptop computer.

    The danger with mixing an EMM with injectors from a different EMM, is that you don't know what compensation values the injectors are supposed to be using, nor do you know what compensation values the EMM you have is actually using.

    If an injector was flowing rich during testing, the compensation numbers for that injector would tell the EMM to compensate and run the injector pulses on the lean side. The result is spot on fuel:air ratio.

    Now if you connect a different injector to that EMM, and that other injector actually needed compensation the other way, the result would be a lean injector with the EMM also working to further lean the fuel delivery to that cylinder.

    That is where the risk lies, in one or more cylinders running leaner than expected. And we know that lean operation in a 2-stroke engine is where the risk of piston damage happens.

    The Ficht EMM runs open loop. There is no sensor in the exhaust to tell whether a cylinder is running lean. It will simply run with the compensation values it is programmed with, and it expects that the injectors are actually flowing the correct amount of fuel to match those compensation values.

    Note: The EMM version/part number is also matched to the engine model/year, but that turns out to not be a big problem as long as the engines are completely stock. Model to model differences among the same engine size seem to not be a problem when swapping EMMs between engines.

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