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1989 YJ No spark cranking

Discussion in 'Wrangler YJ (1986-1995)' started by sabbath93, Jun 11, 2019 at 9:02 PM.

  1. Jun 11, 2019 at 9:02 PM
    #1
    sabbath93

    sabbath93 [OP] New Member

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    I have a 4.2 in my jeep and it just stopped starting the other day I have power to the positive side of my coil when the key is turned to run but as soon as I try to crank it over there is no power to the coil not too sure where to go with this kind of leaning towards ignition control module but any insight would be appreciated

    Thank you
     
  2. Jun 12, 2019 at 3:37 PM
    #2
    Jim Beam

    Jim Beam Well-Known Member

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    Vehicle:
    1986 CJ7
    Fuel Injection, Dana 44s, T18, 4.10s w/lockers
    If your ignition module is going bad they do get hot to the touch when the engine is running, even begin to ooze out gooey stuff. Another symptom would be an ignition miss which gets worse as the engine warms up. Although I have heard of them quit running due to a bad module. Those slip on coil connectors can corrode or wear out causing a bad connection. Another thing that can go bad with these symptoms is the pick up coil in the distributor. It is wired to the purple and orange wires coming out of the distributor. There should be a reading of 600-800 ohms between those two. If you ever replace the module get the one from N.A.P.A. that is made by Echlin which is a bit on the expensive side. The cheaper ones can be bad right out of the box. You can convert to a larger distributor cap to help against spark arcing by doing the "Team Rush" upgrade which is found by looking it up on the www. This is basically adding a larger distributor cap with brass contacts and a taller rotor, a spark plug wire change is required also.
     
    aggrex likes this.
  3. Jun 12, 2019 at 8:40 PM
    #3
    JKBob 25

    JKBob 25 Well-Known Member

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    2" Superlift kit. 315/ 70/17.
    Welcome to the forum @sabbath93 .
    Sorry out of my realm of knowledge when it comes to YJs.
    Was @Jim Beam post any help for you???
    Your fix could help a member in the future. :jeepwave:
     
  4. Jun 13, 2019 at 3:42 PM
    #4
    sabbath93

    sabbath93 [OP] New Member

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    Im going to test this out tomorrow I work nightshift tonight so I will post when I figure out the issue
     
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