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Unread 01-16-2010, 06:50 PM   #1
Woolys_CJ7
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1976 CJ7 
 
Join Date: Apr 2009
Location: Chandler, AZ
Posts: 27
No Spark – Help

I just finished rebuilding the top end of the 304 and everything is back together and hooked up as before when it was running. Engine turns over fine but we have no spark, checked at the number 1 cylinder and then from the coil to the distributer, no spark at either location.

I then followed the Chilton manual as best as I understood the trouble shooting procedure. What I found at the coil with the ohm meter was battery voltage from the positive terminal of the coil to ground, which is what the manual says is correct. Then I tested the negative side, have battery voltage, supposed to have 5 to 8 volts, further testing on coil made me question the coil and I purchase a new one. I still have battery voltage on the negative terminal, and no spark from the coil, check by turning engine over with ignition on and holding coil wire ½ inch from a ground.

Looking for ideas and testing procedural help.

Thanks in Advance,
Wooly

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Unread 01-16-2010, 10:04 PM   #2
TBailey
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1983 CJ7 
 
Join Date: Dec 2009
Location: Pensacola,FL
Posts: 305
you my want to check your ignition module,I think most auto parts stores can test them for you
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Unread 01-16-2010, 10:36 PM   #3
VACJ7
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1984 CJ7 
 
Join Date: Jul 2008
Location: Northern Virginia
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Does your '76 use the Prestolite ignition? Jeephammer has some general testing procedures here and more specific info for the Prestolite: http://www.jeepforum.com/forum/f8/i-...0/#post7068393
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Unread 01-17-2010, 08:02 AM   #4
Woolys_CJ7
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1976 CJ7 
 
Join Date: Apr 2009
Location: Chandler, AZ
Posts: 27
Thank you the link to Jeephammers write up was exactly what I was looking for!
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Unread 01-17-2010, 04:09 PM   #5
Woolys_CJ7
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1976 CJ7 
 
Join Date: Apr 2009
Location: Chandler, AZ
Posts: 27
Result, it was the factory plug from the module into the harness no longer making a good connection. A little electrical contact cleaner followed up with dialectic grease and problem solved. Now to fix the exhaust leak.

Thanks
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Unread 01-17-2010, 09:22 PM   #6
jfwireless
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1976 CJ7 
 
Join Date: Apr 2007
Location: Naples, FL
Posts: 1,417
Well if you still have that original Presolite distributor and ignition, time to change that out.

Jim
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