Limp Mode?

Discussion in 'Touring Models' started by vtwinrider, Apr 18, 2011.

  1. vtwinrider

    vtwinrider Member

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    Greetings all

    After having some trouble with my 2006 FLHTCUI running on 1 cylinder, a friend said that it sounds like "limp mode". Does anyone have info on this or know if the 2006 injected cruisers have this mode?

    Thanks in advance.
     
  2. Hoople

    Hoople Account Removed

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  3. tlyoungb

    tlyoungb Junior Member

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    That is very interesting. I have a friend of mine that has the same bike you have, and they were out on a trip not long before Leesburg bikefest.

    The group of them were riding down the road when his starting putting along on 1 cylinder. They though it was bad gas so they drained the tank.

    Well to their surprise, it was not the gas, but inside the fuel tank there was a small cap that looked like this.

    [​IMG]

    When he had this replaced, the mechanic said this was the 4th one he has replaced in our area due to ethanol gas eating away at these plastic parts.

    His ran on 1 cylinder for a while and then just shut down.



    [​IMG]
     
  4. dbmg

    dbmg Experienced Member

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    Limp Mode is a default that the ECU returns to when there is a component failure. It is designed to let bike run in a reduced performance mode so that you can get home or to dealer.
     
  5. tlyoungb

    tlyoungb Junior Member

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    Sorry....My mistake....Just trying to help.
     
  6. Streetglider08

    Streetglider08 Member

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    Correct. I was also told that if the bike gets too hot for instance sitting in a lot of traffic that this would also make the bike cut out a cylinder to prevent damage. Is this correct?
     
  7. vtwinrider

    vtwinrider Member

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    Thanks for all of the input! I especially appreciate pictures, all great things to consider. Here are the codes, it sounds like voltage issues but I am not sure what to make of them.

    Under "P"
    PO108
    PO113
    PO118
    PO112
    PN 34309-06

    S-None
    PN 68920-old

    SP-PN 61005

    T-None
    PN 67348-04A

    Thanks again to everyone, I have learned more about my bike in the last 2 days than I have in the last 4 years!
     
  8. Bud White

    Bud White Well-Known Member Retired Moderators

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    map sensor might be shot but with rest of the codes id check for overcharging or a broker wire since they all say high or open
     
  9. bobalu

    bobalu Active Member

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    Only bikes with the Engine Idle Temperature Management System (EITMS) will do this. I don't know what year HD introduced this (2009?). My 2010 RKC has it. There are a series of programmed "conditions" that have to be met before this will engage (speed, throttle position, engine temperature, engine speed).

    Limp Mode is part of the Electronic Throttle Control (ETC) system introduced to the Touring line I think in 2009(?). Commonly referred to as "fly by wire". An Electronic Control Module (ECM) controls the fuel injection/TB from the wireless throttle. If the system malfunctions, there are a series of backups, of which the limp mode (max 25mph) is one.
     
  10. Hoople

    Hoople Account Removed

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    The way it is worded, it almost sounds like your trouble is past tense and you were just inquiring to what "limp mode" was. Does the bike currently sound like it's running on 1 cylinder?