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hard starting

Discussion in 'Intermediate CJ-5/6/7/8' started by walterv, Feb 11, 2006.

  1. walterv

    walterv Member

    Well, got a 75 304 with a mallory coil and distributor. The motor will fire right up run a few seconds and die. It will crank several times with no fire from the coil, let it set a few minutes and it will fire up again. It will do this 3 or 4 times then will start and run. It will start and run fine until it sets all day at work or all night at home. Is there something that needs replaced? I did replace the ign, and checked all the wiring. Thanks for any ideas/help. Walt
     
    walterv, Feb 11, 2006
    #1
  2. walterv

    walterv Member

    Just FYI, seems the problem is the porcelin ballast resistor. When the motor cranks with no fire, I can use a jumper wire to bypass the resistor and it will start and stay running. Take the jumper wire off and it will crank with no fire.
     
    walterv, Feb 11, 2006
    #2
  3. Patrick

    Patrick Super Moderator Staff Member

    Did you check the voltage on the + side of the coil? Should be ~12 or so while cranking, and drop to something around 9 while running. Sounds like the ballast may be junk...
     
    Patrick, Feb 11, 2006
    #3
  4. walterv

    walterv Member

    That was the problem. The ballast is junk.
     
    walterv, Feb 12, 2006
    #4