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got it working... I thought

Discussion in 'XJ Technical Chat' started by John DE, Jul 10, 2015.

  1. John DE

    John DE Member

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    Well all i got my bike finally started last night and rode it around for a bit but when i parked it for the night last night and tried to restart it today it wouldnt start. Im still getting no spark on plug 1 which had it as i watched it spark last night and the bike fired up. I dont know what i did to fix it but all i know is that it def is a spark issue
    causing the issue as no blue spark can be seen when turning the engine over. Also a weird thing that it is doing is the rpm gauge needle jumps around to redline and back down when hitting the start button and sometimes with just the Ignition turned to the on position with the key. Anyone have any ideas as to why my bike is acting so erradictly?
     
  2. rocs82650

    rocs82650 Well-Known Member

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    What all have you done to it?

    Gary H.
     
  3. John DE

    John DE Member

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    Redid the fuse box, cleaned all connections with electrical cleaner, tested the tci it checked out and the coils i assume are okay if the bike just started last night after some tinkering with it.
     
  4. rocs82650

    rocs82650 Well-Known Member

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    Unscrew the cap from #1, cut 1/4" off the end of the wire, replace the cap, pull the #1 and #2 plugs, check the gap, swap and replace the plugs. See if it fires.

    Gary H.
     
    Luis likes this.
  5. John DE

    John DE Member

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    Okay i will thank you do you think it is a plug and wire issue rather than electrical coil or tci wise?
     
  6. rocs82650

    rocs82650 Well-Known Member

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    Idk just checking a few things.

    Gary H.
     
  7. k-moe

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

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    #1 and #4 share a coil, so if you are getting spark on #4, but not on #1 that means the problem lies somewhere between the coil and the sparkplug. Cut the wire back as suggested.

    The Tack takes its feed from the grey wire on the #2/#3 (right side) coil. You'll need to inestigate the condition of the wiring between those two points. It is posible that there is a problem inside of the tachometer itself.
     
  8. John DE

    John DE Member

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    Okay guys thanks the tack itself is always an issue with it jumping but the spark issue is on all plugs i believe because when the bike fired up last night i had plug 1 grounded to a engine bolt and i saw the blue arc come across on it and it sparked
     
  9. John DE

    John DE Member

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    The tach works fine though also fyi when the bike is riding.
     
  10. rocs82650

    rocs82650 Well-Known Member

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    We're trying to find out if the spark is weak caused by a weak connection, a bad coil, a bad plug, a bad resistor or a combination thereof.

    Gary H.
     
  11. John DE

    John DE Member

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    Well the plugs were just regapped with my gap tool to .32 i believe and are only about a month old maybe been through 4 rides max. I checked all the connections the best i could when i unplugged and cleaned them all with a q tip and a toothpick also i was sure of even the grounds.
     
  12. rocs82650

    rocs82650 Well-Known Member

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    You'll have to unscrew the caps to look for corrosion and or a bad connection. Two of the ht caps have screw in resistor holders (they should be snugged). If all the connections are good you can ohm out the coils or swap them to check for a bad coil. Hope this helps.

    Gary H.
     
  13. John DE

    John DE Member

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    Okay thank you so much i appreciate it, one last thing i have a dmm how do i check for a bad coil with it? It goes from 20 to 200 to 2000 to 20000 on the ohm scale
     
  14. rocs82650

    rocs82650 Well-Known Member

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    Test primary resistance (input) side of coil:
    1.Disconnect the coil from the harness.
    2.Set dmm to the Ω scale.
    3.Touch the probes to the thin wire connectors from wire harness(the probes can touch either connector).
    4.The resistance should read 2.5Ω +/- 10%.

    Test for secondary resistance (output) side of coil (the input side should be connected):
    1.Unscrew caps from coil wires.
    2.Set the dmm to the 20k Ω scale.
    3.Touch the probes inside the wires where the caps were screwed.
    4. The resistance should read 11kΩ +/- 20%.

    Gary H.
     
    Last edited: Jul 11, 2015
  15. John DE

    John DE Member

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    Okay thank you i put up a new thread about the problems im still having being continued from this thread called still having issues up. The problems i am still having is no spark to any of the plugs that i can see still after checking and having two good ignition coils, pickup coil and connection from pigtail to tci box. Battery is at 12.5 volts with ignition on and the killswitch is working properly when switched to on or run. I even cut the plug wires back to get new thread out of them for the screws to have more bite with no luck. Anyone know what i should check next?
     
  16. rocs82650

    rocs82650 Well-Known Member

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    This thread is continued in a thread titled "still having issues ". Idk why John started a new thread.

    Gary H.
     
  17. k-moe

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

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  18. John DE

    John DE Member

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    Sorry guys just trying to fix my issue asap if i can before i go on vacation for 2 weeks and my bikes put away for the year
     
  19. John DE

    John DE Member

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    New problem arose in which i found weird as well. Tinkered around on my bike some a little bit ago i took a look at the flasher relay and for the hell of it took it off and attenpted to start the bike in which the bike choked a few times then died and would not start back up again after reataching the relay and all. The blinkers themselves are all flashing at once though i found as well which could indicate a problem i feel. I do have aftermarket leds but did the relay swap out for a new one and took the indicator bulb out which it worked until i saw the issue now along with my no start problem. Could these problems be linked?
     

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