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Advance

Discussion in 'XJ Technical Chat' started by Switz1, Oct 14, 2006.

  1. Switz1

    Switz1 Member

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    Do we have a vacuum advance unit in our ignition systems on the XJs?
     
    Switz1, Oct 14, 2006
    #1
  2. HooNz

    HooNz Member

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    No not if its standard.
     
    HooNz, Oct 14, 2006
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  3. ArizonaSteve

    ArizonaSteve Member

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    Actually it depends, the 1100 with an older XS1100 engine has vacuum advance but newer 1100's and the XJ650 and 750 use electronic advance.
     
    ArizonaSteve, Oct 14, 2006
    #3
  4. Switz1

    Switz1 Member

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    Any way to tell if the advance is working? Im familar with vacuum advance units on cars, just never heard of electronic ones
     
    Switz1, Oct 14, 2006
    #4
  5. ArizonaSteve

    ArizonaSteve Member

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    The same way, connect the timing light and see if it advances the correct amount at the proper RPM! If in doubt check the service manual for the procedure.
     
    ArizonaSteve, Oct 14, 2006
    #5

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