1977 Jeep CJ5 Cranks but No start

Tiny
EAGAN11
  • MEMBER
  • 1977 JEEP CJ5
  • 6 CYL
  • 4WD
  • MANUAL
  • 100 MILES
I have done some preliminary checks, what I found wash no spark while cranking but sometimes a small spark when cranking is stoped. I have looked at all the connections, they appear to be "ok". I have voltage to the coil with ign swtich on and while cranking. I am thinking it may be the hall switch in the dist.
Thursday, October 14th, 2010 AT 10:34 AM

6 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Could be the hall effect sensor, ignition coil and module
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Thursday, October 14th, 2010 AT 10:45 AM
Tiny
EAGAN11
  • MEMBER
  • 15 POSTS
I will check the rotation of the dist and check the signal from the hall switch, how do I do that anyways? Does it need to be powered up in order to see the signal? How do I test the ign module?
Thanks
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Thursday, October 14th, 2010 AT 11:22 AM
Tiny
EAGAN11
  • MEMBER
  • 15 POSTS
I did find the coil wire is open, could taht have caused damage to the ign module, I read that you need to disconnect something while testing? I also read that you should not use plug wires 3 and 5 for testing. My thoughts are if the coil wire failed did it cause an internal issue with the ign module?
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Thursday, October 14th, 2010 AT 11:24 AM
Tiny
EAGAN11
  • MEMBER
  • 15 POSTS
I WAS HOPING THAT CJMEDIVAC WOULD CHIME IN ON HERE.

I know he has a lot of experience with the older CJ's
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Thursday, October 14th, 2010 AT 1:28 PM
Tiny
CJ MEDEVAC
  • MECHANIC
  • 11,004 POSTS
See my profile,

Hey Jeep Feller, Just came across you, at another answer I gave. Answered you some there.

Since I already got started there, I will continue there

The Medic
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Thursday, October 14th, 2010 AT 4:52 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
If the coil is sparking the ignition control module is good its purpose is to switch the primary windings-it acts similar to a contact point distributor to break the circuit-
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Thursday, October 14th, 2010 AT 7:16 PM

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