1. 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.

86 xj700 spark plug caps

Discussion in 'XJ Technical Chat' started by to the max, May 1, 2022.

  1. to the max

    to the max Member

    Messages:
    94
    Likes Received:
    12
    Trophy Points:
    8
    Location:
    Akron, Ohio
    my 1 and 4 plugs both have 10k caps on them. 2 and 3 have 5k caps... what are they supposed to be?

    i'm using BP8ES plugs.

    sorry for yet another caps thread

    since i posted this, i found this...

    XJ700 air-cooled models:

    Pick-up coils:
    120 ohms +/- 20% = 96 ohms to 144 ohms acceptable range


    Ignition Coils:

    Primary side (input from main wiring harness):
    2.7 ohms +/- 10% = 2.43 ohms - 2.97 ohms acceptable range

    Secondary side (spark plug wires, without their end caps):
    12K ohms +/- 20% = 9,600 ohms - 14,400 ohms acceptable range


    Spark plug caps:
    1985 N/NC models: 5K +/- 20% = 4,000 to 6,000 ohms per cap acceptable range
    1986 S/SC models: 10K +/- 20% = 8,000 to 12,000 ohms per cap acceptable range


    Spark plugs:
    1985 N/NC models: 0 ohms per plug
    1986 S/SC models: 5K ohms per plug
     
    Last edited: May 1, 2022
    to the max, May 1, 2022
    #1
  2. Huntchuks

    Huntchuks Well-Known Member

    Messages:
    959
    Likes Received:
    399
    Trophy Points:
    63
    Location:
    East Rochester, NY
    Huntchuks, May 2, 2022
    #2
  3. to the max

    to the max Member

    Messages:
    94
    Likes Received:
    12
    Trophy Points:
    8
    Location:
    Akron, Ohio
    That’s how you set yours up and it worked good?
     
    to the max, May 2, 2022
    #3
  4. Huntchuks

    Huntchuks Well-Known Member

    Messages:
    959
    Likes Received:
    399
    Trophy Points:
    63
    Location:
    East Rochester, NY
    Seems to.
     
    Huntchuks, May 2, 2022
    #4
  5. SQLGuy

    SQLGuy Well-Known Member

    Messages:
    2,140
    Likes Received:
    175
    Trophy Points:
    63
    Location:
    Colorado Springs, Colorado USA
    Wow. I wonder whether the coils are different in '86, too. That's quite a difference in burn time.
     
    SQLGuy, May 3, 2022
    #5
  6. to the max

    to the max Member

    Messages:
    94
    Likes Received:
    12
    Trophy Points:
    8
    Location:
    Akron, Ohio
    My coils have 12k. After reading a few threads in here, It appears that we can’t really trust any of the service manuals. I did what Huntchunks said. I plan on doing a colortune so after I do all that I’ll come back here and post my whole setup
     
    to the max, May 3, 2022
    #6

Share This Page