1. Some members were not receiving emails sent from XJbikes.com. For example: "Forgot your password?" function to reset your password would not send email to some members. I believe this has been resolved now. Please use "Contact Us" form (see page footer link) if you still have email issues. SnoSheriff

    Hello Guest. You have limited privileges and you can't "SEARCH" the forums. Please "Log In" or "Sign Up" for additional functionality. Click HERE to proceed.

Cylinder troubles

Discussion in 'XJ Technical Chat' started by cansirsks, Jun 17, 2010.

  1. cansirsks

    cansirsks New Member

    Messages:
    14
    Likes Received:
    0
    Trophy Points:
    1
    Location:
    Pine trees
    Hello, I've been working on ignition problems on my 1993 XJ600 seca. Had the coils tested, found to be ok, tried 2 different ignition boxes, spark plugs are new, and still the 2 and 3 cylinders don't fire. If anyone has an idea on what it could be, please let me know.
     
    cansirsks, Jun 17, 2010
    #1
  2. yamaman

    yamaman Member

    Messages:
    822
    Likes Received:
    0
    Trophy Points:
    16
    Location:
    Staten Island, NY
    Did you check the resistance on the plug wires? Are you getting spark? Why don't you think its the carbs?
     
    yamaman, Jun 17, 2010
    #2
  3. cansirsks

    cansirsks New Member

    Messages:
    14
    Likes Received:
    0
    Trophy Points:
    1
    Location:
    Pine trees
    Tested the coils myself and had RJ sport and cycle test them, coils are good. About a month or 2 ago I paid a shop to overhaul and sync the carbs. It ran great untill a wire that ran from the fuse box was came loose at the fuse box itself, and was causing it to run on 2 cylinders. I plugged the wire back in so it seat properly and now continues to run on 2 cylinders.
     
    cansirsks, Jun 17, 2010
    #3
  4. RickCoMatic

    RickCoMatic Well-Known Member

    Messages:
    13,842
    Likes Received:
    67
    Trophy Points:
    48
    Location:
    Massachusetts, Billerica
    Swap the Coil "Plug-in" to the Wiring Harness and see if the 2/3 Holes fire and the 1/4 Holes miss.
    Yes. Bad Coil.
    No. Ignition related troubleshooting to do.

    Before swapping the Coil Plug-in's ...
    Physically inspect every cm of the Ignition Pick-up Coil Wires going to their Plug-in for anything that would cause a short.

    Sometimes the Shifter Case is removed and the Pick-up Coil Wire severed or shorted.
     
    RickCoMatic, Jun 17, 2010
    #4
  5. yamaman

    yamaman Member

    Messages:
    822
    Likes Received:
    0
    Trophy Points:
    16
    Location:
    Staten Island, NY
    I think if you swap the coil plug in's (white connectors behind the coils) you'll have to swap the plug wires from 1/4 to 2/3 and vice versa. If the motors cold you'll know by keeping your hand on the headers and seeing which are warming up. Real quick test. Let us know
     
    yamaman, Jun 18, 2010
    #5
  6. Ground-Hugger

    Ground-Hugger Member

    Messages:
    801
    Likes Received:
    0
    Trophy Points:
    16
    Location:
    Near Port Dover Ontario
    Check the resistance of the plug caps on 2/3. My 1/2 where fine but 2/3 the resistance was so hi I couldn't even see the spark.
     
    Ground-Hugger, Jun 18, 2010
    #6
  7. RickCoMatic

    RickCoMatic Well-Known Member

    Messages:
    13,842
    Likes Received:
    67
    Trophy Points:
    48
    Location:
    Massachusetts, Billerica
    No.
    When you SWAP Coil Plug-in's ... you DO NOT Swap Spark Plug Wires.
    The whole idea is to Test the Coil making the opposite two Cylinders fire.
     
    RickCoMatic, Jun 18, 2010
    #7

Share This Page