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Battery voltage

Discussion in 'XJ Technical Chat' started by Plug, Sep 4, 2017.

  1. Plug

    Plug Active Member

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    Wondering if someone knows off the top of their head at at approximately what battery voltage does the tci fail to work, or you would lose spark?
     
    Plug, Sep 4, 2017
    #1
  2. Chitwood

    Chitwood Well-Known Member

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    Around 9 or so I believe? Someone will correct me I'm sure
     
    Chitwood, Sep 4, 2017
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  3. Plug

    Plug Active Member

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    Thank you!!! I appreciate it!
     
    Plug, Sep 4, 2017
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  4. Chitwood

    Chitwood Well-Known Member

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    Of course. I say I believe it's 9 volts as when you do a standing/cranking test of the battery voltage you want the voltage 12.2 or above standing, and no less than 9 when the start button is pushed otherwise you will likely end up with a crank no start/no spark condition
     
    Chitwood, Sep 4, 2017
    #4
  5. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

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    Anything below 10 volts is sketchy. Below 9 and it's definitely a no-go.
     
    k-moe, Sep 4, 2017
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  6. XJ550H

    XJ550H Well-Known Member Premium Member

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    9.8 by the xj4ever info if i .understand it correctly. 10 and up should be good to go
     
    XJ550H, Sep 5, 2017
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  7. ziggy1

    ziggy1 New Member

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    Wait so if the battery is below 9 volts it will crank but not start? this might be my problem
     
    ziggy1, Sep 11, 2017
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  8. Stumplifter

    Stumplifter Well-Known Member

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    You may just hear a click.
    Buy a new battery... this coming from the cheapest guy this side of the Mississippi.
    Wish I had a nickel for how many times a bad/weak/ spent battery has been an issue... this coming from the cheapest guy this side of the Mississippi.
     
    Stumplifter, Sep 12, 2017
    #8
    Jetfixer likes this.
  9. XJ550H

    XJ550H Well-Known Member Premium Member

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    starter will spill well after battery will no longer power TCI to start bike
     
    XJ550H, Sep 12, 2017
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  10. cgutz

    cgutz Well-Known Member

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    Took me almost 20 years of XJ ownership to figure this out. It was why I often could not get my XJ started, esp. at the beginning of riding season, when my battery started to age. It would crank and crank, but no fire. Once I jumped to a car battery, or cranked it with a charger attached, it would fire right off.
     
    Last edited: Sep 12, 2017
    cgutz, Sep 12, 2017
    #10
    Jetfixer likes this.
  11. Jetfixer

    Jetfixer Well-Known Member

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    I upgraded to AGM sealed Battery ..was not cheap but if I only get one season out of a conventional Wally World Battery ( CHINA) and have to buy another one next season ... Bought the best this year supposed to be 3 yr battery. and no mess !!!! Bike seams happy have yet to have it run down cranking engine. Just my 2 cents worth.
     
    Jetfixer, Sep 12, 2017
    #11

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