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No spark!

Discussion in 'XJ Technical Chat' started by yamabobber, Apr 13, 2008.

  1. yamabobber

    yamabobber Member

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    i know this has been gone over before, BUT.... i not grtting any spark out to my plugs, TO my plugs. i need help and what is the tci?
    Please, anything
     
    yamabobber, Apr 13, 2008
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  2. justinunity

    justinunity New Member

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    the tci is the black box about the size of a deck of cards plugged into your bikes electrical system. I had intermittent failure with mine, it would die while I was riding, and when I changed that, it worked perfectly from then on.

    on the xj750 maxim it is on the left side just below the seat, behind the triangular metal panel that has the word maxim on it.
     
    justinunity, Apr 13, 2008
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  3. yamabobber

    yamabobber Member

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    that clears up alot. thank you
    unfortunately i change everything in the electricial system and nothing form the solenoids and i change them too!
    thank you justin
     
    yamabobber, Apr 13, 2008
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  4. philbrewer

    philbrewer Member

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    Did you change the TCI? What about the pickup coils?
     
    philbrewer, Apr 13, 2008
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  5. yamabobber

    yamabobber Member

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    yes i have two so i dam near changed everything
    to no avail

    thanks though, i'll take anything right now
     
    yamabobber, Apr 13, 2008
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  6. Robert

    Robert Active Member

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    Look up no spark on the forum archives, there are a ton of threads on this topic.
    If you swapped out the TCI and the other parts, it is possible that you have two bad parts (they are 25+ years old). Have you tested the components off of the bike? Use an ohm meter and follow the instructions in the service/Haynes/(your choice here) manual.
     
    Robert, Apr 14, 2008
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  7. mac11

    mac11 Member

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    how did you determine you had no spark?
     
    mac11, Apr 14, 2008
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  8. yamabobber

    yamabobber Member

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    i put a screwdriver in the terminal wire and tried to get see any spark and also put my fluke leads in the wire and turned it over with no reading at all
    Now... i did some welding on the frame with the ignition coils still hooked to the frame, would that fry them? if so i did change them out with my others
    but if i don't have enough cold crannking amps being that maybe i tried too many times to crank it i wouldn't get any spark then,would i ?so i 'm charging
    the battery and retracing everything. thanks
     
    yamabobber, Apr 15, 2008
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  9. yamabobber

    yamabobber Member

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    hey robert i checked the archives and it helped enough for me to try something i have done yet, thanks for your input
     
    yamabobber, Apr 15, 2008
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  10. Robert

    Robert Active Member

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    Glad to offer suggestions but I'm hoping to offer solutions.
    You say you tried turning the engine with the meter plugged into the secondary coil lead? Man, I hope you have a meter capable of getting nailed with 20KV! Welding on a bike with the electronics still attached is a dicey affair, odds are not in your favor that they survived. On the bright side, there have been one or two reports of folks getting through that without apparent damage. I hope you will be similarly blessed.
    Do you have a book with specs?
     
    Robert, Apr 15, 2008
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  11. MiCarl

    MiCarl Active Member

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    You don't say which bike......

    I helped WarDog12 with a no spark issue on his 550. It turned out to be a dirty kill switch.
     
    MiCarl, Apr 15, 2008
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  12. yamabobber

    yamabobber Member

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    hey guys i really want to thank you for all your help . i believe we have norrowed it down to the pick-up coil/gov. i guess we'll see tomorrow
    thanks again!
     
    yamabobber, Apr 15, 2008
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  13. Gamuru

    Gamuru Guest

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    By coincidence, I was reading in my latest issue of Counterman (trade magazine for us parts guys) about welding on a vehicle with onboard electronics. They recommended that the negative battery cable be removed before welding. Seems simple enough.
     
    Gamuru, Apr 15, 2008
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  14. yamabobber

    yamabobber Member

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    yeah, i spoke with a man today and said the samething to me.
    lucky enough i didn't even have the battery on the bike
     
    yamabobber, Apr 15, 2008
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