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Unread 03-19-2014, 01:01 AM   #1
highlands124
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1971 CJ5 
 
Join Date: Mar 2014
Location: Oroville, WA
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Not firing

My V6 will only fire on the drivers side cylinders 2,4 and 6 fire 1,3 and 5 don't. Does anyone have a suggestion on what may be the reason. Still has points but am installing electronic ignition. Any thoughts?

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Unread 03-19-2014, 05:06 AM   #2
jeepdaddy2000
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1971 CJ5 
 
Join Date: Jan 2002
Location: Eagle Point Oregon
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A couple...
First, how does your intake split? Many 225 V6 intakes split with the left side running on one barrel and the right on the other. If this is the case, your going to want to look at the carb to see what is up with the side running that particular bank of cylinders.
The 225 odd fire engine has a very particular firing sequence in relation to degrees of crank rotation and must be adhered to. This means the #1 plug wire must be in the tower labeled 1, with the rest of the firing order correct and in the right direction.
Insure the point gap (dwell) is set and there is no play in the distributor shaft.
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Unread 03-19-2014, 06:47 AM   #3
highlands124
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That is today's project. Really hoping its an electrical issue and not mechanical. Any suggestions on which electronic ignition to install? Picking up points and rotor etc. and starting from scratch.
It appears to be getting fuel on both sides so thinking its gotta be electric.
Thanks for your help, may need some more after today.
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Unread 03-19-2014, 09:36 PM   #4
jeepdaddy2000
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Stock HEI from a 76 Buick Regal (or any Buick or Pontiac offering in 76 or 77 with the 231 oddfire engine). Should be available from such places as NAPA. You may need to shave the front intake bolt and possibly the intake to get it to drop (stock vehicles of that year used a "button" headed bolt to clear the bottom of the dist). Pretty simple one wire install, needing only to bypass the ballast resistor.
I still would like you to take a look at the intake. In my experience anytime you loose half an engine, it is generally a carburetor problem.
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Unread 03-19-2014, 10:29 PM   #5
highlands124
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Frustrated

Worked on it all day with my very good mechanic friend (he's good 22 years at Ford. Restores cars from ground up and can rebuild an engine with his eyes closed). He is stumped for the first time since I've known him.
He checked the intake (removed, checked and reinstalled) and says we are getting fuel to both sides and have spark on all 6 just 1,3,5 won't fire.
He says the dist. appears to be working along with the carb.
The engine was rebuilt by a shop in Tacoma WA never used and just parked because of other project so I really do not know if it fired on all 6 when I got it back.
My thought is to install electronic ignition and go from there then I can eliminate the dist as a possible issue.
My buddy says it could be the wrong cam but the valves are opening in the right sequence.
So to me if dist and carb are working it must be a timing issue. We will recheck the carb tomorrow but he says it's working as designed.
What mechanical issue could also cause no fire to 1,3 and 5 any thoughts?
I believe it's the stock engine. I keep hearing 225 v6 and 231 v6. Which one did jeep use?
What would you suggest? I really appreciate your taking an interest.

Last edited by highlands124; 03-19-2014 at 10:58 PM.. Reason: Added sentence
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