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Still no spark....

Discussion in 'XJ Technical Chat' started by thehammer12, Apr 27, 2009.

  1. thehammer12

    thehammer12 Member

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    Ok guys Im still not getting any spark so Im going to tell u what I have done or replaced and if u can let me know what to do next that would be great.

    Checked or replaced:
    plugs-replaced
    ignition coils- replaced
    starter solenid-replaced
    battery-charged and replaced with new one
    starter--tested and is working strong
    Fuses-good
    sidekick stand switch/relay---tested and working
    gas in tank and motor----yes lol
    carbs----cleaned and reset to factory specs
    throttle cable---replaced
    Ignition/pick-up coil------checking now but looks good.
    Random switches/relay---tested and getting power
    ground connections-----seem secure and cleaned




    Its cranking strong but Im not getting it to start up, so please any help would be great.
     
    thehammer12, Apr 27, 2009
    #1
  2. MN-Maxims

    MN-Maxims St. Paul Minnesota

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    Wow you are at wits end with that bike. All grounds ok? Did you ohm out the wires from the pick ups to the ignitor unit? Just thinking out loud here.
     
    MN-Maxims, Apr 27, 2009
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  3. thehammer12

    thehammer12 Member

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    Grounds are good and clean/secure. How do I ohm out the wires from the pick ups to the ignitor unit? Can you tell me how to test it?
     
    thehammer12, Apr 27, 2009
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  4. MN-Maxims

    MN-Maxims St. Paul Minnesota

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    Do you have a multi meter?
     
    MN-Maxims, Apr 27, 2009
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  5. wizard

    wizard Active Member

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    Follow the wiring diagram & make sure you have 12v to all the right places.
     
    wizard, Apr 27, 2009
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  6. thehammer12

    thehammer12 Member

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    Yes I have a multimeter, do I just pull all the connections apart and test for power?
     
    thehammer12, Apr 27, 2009
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  7. MN-Maxims

    MN-Maxims St. Paul Minnesota

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    Check the wires put meter on RX1 scale and check from the pick up coils (poke the wires) to the ignitor and then from the ignitor to the ignition coils. Check all the way through the connector behind the engine. You are not getting continuity through there some where. With all the stuff you changed it has to be a bad wire somewhere. Thats my thoughts.
     
    MN-Maxims, Apr 27, 2009
    #7
  8. SQLGuy

    SQLGuy Well-Known Member

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    Since this is an XJ forum, I assume you have some model of XJ (hint, hint, what bike is this?)...

    Since XJ's all have 4 cylinders, you should have two coils and two pickups and two channels to the TCI unit, which gives you two separate systems with low probability of both being bad. So, assuming (having to make a lot of assumptions here) that you don't have spark from either 1/4 or 2/3, there aren't too many places to look - as there are only a few things that will disable both systems.

    Check that you do have +12V between the Black wire (ground) and the R/W wire at the TCI unit while cranking.

    Check that you don't have ground (continuity to chassis) on the B/W wire of the TCI unit when cranking.

    If the first test fails, you have a problem with fuses or the ignition switch.

    If the second test fails, you have a problem with the engine stop switch, neutral switch, sidestand switch, or sidestand relay.

    If neither test fails, your TCI unit may be just plain bad, or you're unfortunate enough to have two things wrong elsewhere in your system.

    Cheers,
    Paul
     
    SQLGuy, Apr 27, 2009
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  9. thehammer12

    thehammer12 Member

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    Sorry guys I have an XJ550....

    MN-MAXIMS, if there is a bad wire on the harness how do I swap it out?

    SQLGUY--- I will check those test today and get back asap with results..
     
    thehammer12, Apr 28, 2009
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  10. Blackout550

    Blackout550 Member

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    I've got an xj550 as well with a mystery spark problem. let us know what you figure out.
     
    Blackout550, Apr 28, 2009
    #10

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