1. #1
    ce2swanson's Avatar
    ce2swanson is offline Junior Member
    Join Date
    Dec 2019
    Posts
    4

    87 YJ, no spark - New coil, ignition module, condenser, distributor HELP!

    I have a 87 Wrangler YJ, 4.2 6cyl. Recently, a year ago, new parts are Radiator, Webber Carb, distributor cap, rotor, wires, plugs and so on. Two weeks ago I went to start it and it cranked but would not start. I can smell and see the fuel, even tried starter fluid and still nothing. Once in the garage I pulled a plug and turned it over, no spark. I replaced the coil, no spark. I replaced the ignition module, no spark. I replace the condenser, no spark. I replace the distributor with a new pickup, still no spark. I'm out of things to replace and need a little assistance.

  2. #2
    JPNinPA's Avatar
    JPNinPA is offline Senior Member
    Join Date
    Feb 2009
    Location
    Dayton Ohio Area
    Posts
    5,031

    Re: 87 YJ, no spark - New coil, ignition module, condenser, distributor HELP!

    Check that you have a low res ground to the engine. Check you crank position sensor.


    Sent from my iPhone using Jeepz.com mobile app
    "Never look down on anybody unless you're helping him up" - Jesse Jackson

  3. #3
    Gennybro's Avatar
    Gennybro is offline Senior Member
    Join Date
    Jul 2013
    Posts
    4,107

    Re: 87 YJ, no spark - New coil, ignition module, condenser, distributor HELP!

    what is a low res ground ?
    Needs to go yonder.

  4. #4
    JPNinPA's Avatar
    JPNinPA is offline Senior Member
    Join Date
    Feb 2009
    Location
    Dayton Ohio Area
    Posts
    5,031

    Re: 87 YJ, no spark - New coil, ignition module, condenser, distributor HELP!

    If you were to measure resistance from your engine block to the negative battery terminal it should be less than one ohm.

    As cables corrode and constant points oxidize the resistance will increase.


    Regards,
    JPNinPA

    Sent using TapTalk
    "Never look down on anybody unless you're helping him up" - Jesse Jackson

  5. #5
    ce2swanson's Avatar
    ce2swanson is offline Junior Member
    Join Date
    Dec 2019
    Posts
    4

    Re: 87 YJ, no spark - New coil, ignition module, condenser, distributor HELP!

    I was just looking for a crank position sensor online and it looks like my jeep, 87 with 6cyl did not have one. I will check to see if I have a high resistance ground tomorrow, I need to get this thing running.
    Thanks

  6. #6
    ce2swanson's Avatar
    ce2swanson is offline Junior Member
    Join Date
    Dec 2019
    Posts
    4

    Re: 87 YJ, no spark - New coil, ignition module, condenser, distributor HELP!

    I measured the res and = 0.2ohms. No problem with the ground. When I turn on the ignition should I have a + at the distributor connector? I currently do not have a + at the distributor with key on. Where would be a good site to locate the wiring schematic?

  7. #7
    JPNinPA's Avatar
    JPNinPA is offline Senior Member
    Join Date
    Feb 2009
    Location
    Dayton Ohio Area
    Posts
    5,031

    Re: 87 YJ, no spark - New coil, ignition module, condenser, distributor HELP!

    It could be bad coil, starter relay, and ignition control unit.
    87 YJ, no spark - New coil, ignition module, condenser, distributor HELP!-img_3055.jpg


    Regards,
    JPNinPA

    Sent using TapTalk
    "Never look down on anybody unless you're helping him up" - Jesse Jackson

  8. #8
    Chevytruck_83's Avatar
    Chevytruck_83 is offline Junior Member
    Join Date
    Dec 2019
    Posts
    5

    Re: 87 YJ, no spark - New coil, ignition module, condenser, distributor HELP!

    Check the wire that goes from the coil to the distributor.

  9. #9
    ce2swanson's Avatar
    ce2swanson is offline Junior Member
    Join Date
    Dec 2019
    Posts
    4

    Re: 87 YJ, no spark - New coil, ignition module, condenser, distributor HELP!

    Thanks for the diagram, now I can get the tester out and follow the voltage.

Similar Threads

  1. duraspark ignition module?
    By GlenwoodCJ7 in forum CJ YJ TJ and JK
    Replies: 6
    Last Post: 06-06-2016, 10:11 PM
  2. Which ignition module works best on a 4.2?
    By defmornahan in forum CJ YJ TJ and JK
    Replies: 2
    Last Post: 07-17-2009, 08:42 AM
  3. Coil questions: What ignition coil works best?
    By GaryMB in forum CJ YJ TJ and JK
    Replies: 11
    Last Post: 04-18-2005, 10:29 AM
  4. Ignition module or coil???
    By JeredYJ in forum CJ YJ TJ and JK
    Replies: 6
    Last Post: 02-27-2004, 08:52 AM
  5. Ignition Module
    By derff96963 in forum CJ YJ TJ and JK
    Replies: 5
    Last Post: 12-30-2003, 08:26 AM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Log in

Log in