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TCI and heat

Discussion in 'XJ Technical Chat' started by Stumplifter, Oct 11, 2015.

  1. Stumplifter

    Stumplifter Well-Known Member

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    didn't want to hi-Jack Johnny and June's thread. . . .
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    ↑
    Fwiw, I did have one xj700 that would idle high IF:

    It was in the upper 80's or higher And The bike was well warmed up

    There was a solution, but never a cure, not any identifiable cause.

    ↑
    That is very curious.
    I wonder if it could be the tci unit on Hogfiddles bike. tci controls spark and advances and retards timing. it the timing part thought it was (hung) at an rpm level or locked at that level of timing and would not change and the spark timing would dictate a higher speed and draw gasoline through the CV carbs
    pilot jets would be enough to feed 2k to 3k with slides lifting due to the vacuum forcing gas past partly closed butterfly

    heat does affect ic's and transistor
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    How would one test for an adverse effect of heat on ic's and transistor's (tci).
    Keep in mind that electricity is magic mojo to me.
    I have got a multi- meter and a 'can do' attitude and that's about it.
     
    Stumplifter, Oct 11, 2015
    #1
  2. MN-Maxims

    MN-Maxims St. Paul Minnesota

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    You could take a hair dryer and warm it up and see if it does anything.
    I would pop the cover and look for cracked solider joints, before any
    Thing else though.
     
    MN-Maxims, Oct 11, 2015
    #2
  3. XJ550H

    XJ550H Well-Known Member Premium Member

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    when testing you can use cold spray to test as inverted can of computer cleaner spray will work.

    you do have to spray it into the box on components
     
    XJ550H, Oct 11, 2015
    #3
  4. k-moe

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

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    Ride it in the winter. If the problem does not occur then just keep it as a winter bike ;)
     
    k-moe, Oct 11, 2015
    #4
  5. XJ550H

    XJ550H Well-Known Member Premium Member

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    get some spiked Ice tires and i can run down the rivers instead of the roads aside of them... I just don't want to put my bike away.
     
    XJ550H, Oct 11, 2015
    #5
  6. bensalf

    bensalf Well-Known Member

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    try using a timing light ,see if the advance /retard , firing point alters at higher temperature.
    stu
     
    bensalf, Oct 11, 2015
    #6
  7. SQLGuy

    SQLGuy Well-Known Member

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    Heat within the design spec of the TCI would not have any effect on semiconductors. Heat effects on things like TCIs are usually due to bad caps (looks like there are some small electrolytics in there), or cracked solder joints or traces.
     
    SQLGuy, Oct 11, 2015
    #7
  8. Stumplifter

    Stumplifter Well-Known Member

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    I'll do a visual to kick things off.

    Moved from a growing zone of 5b to 3b (at the farm) - might be good to have a winter bike . . . .
     
    Stumplifter, Oct 11, 2015
    #8
  9. Mavrick9

    Mavrick9 New Member

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    Can the tci for the Xj 600 work on the xj 550?
     
    Mavrick9, Sep 9, 2018
    #9

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