Trouble Timing cj5

Trouble Timing cj5
Nixon

Nixon

Jeeper
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41
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Location
Charlotte, NC
Vehicle(s)
76 CJ5 258
I am having a heck of a time with my Cj. It ran O.K. when I brought it home, but needed a tune up. I replaced wires rotor cap plugs etc. Set the carb mixture screws 1 1/2 turns out. When I went to time it, the marks were not even close. I got the marks to line up , but I had to turn the distributor alot. Needless to say it ran aweful, backfiring etc. I set it back close to where it was, it still backfires a little and is not running real strong. Seems hot too. Why would my timin marks be so off? Could the dist be off a tooth? Would that even make a dif? Thanks for any help.
 
What does your timing mark line up with on the degree scale?
Is your distributor cap cracked, not seated properly, same with your rotor.
Is there any chance that the spark plug wires are out of order?

What did you gap the plugs to?
Check vacuume lines
 
Hello Nixon and welcome to our site! :chug:

I'm assuming you did not pull the dist - correct? If you did not, about the only way for the marks to be off so far is -


  • The cap is on wrong
  • The wires are on wrong
  • The rotor is on wrong
  • You have the timing light connected to the wrong wire
  • The advance mechanism under the rotor is locked or jammed
 
Retrace your wires and make sure you have them in the correct order, if so, I would just reset the time, in my experience with timing ( which is my weak point) a tooth off can make a hell of a difference!
 
what engine do you have? If it is an odd fire V6 you can really get things off with improper wire placement
 
Thanks guys for your help. I should have mentioned it is a AMC 258 i6 / 4.2l 6cyl. I'm not sure the dist is in right. The guys I bought it from started tinkering and while he did put some nice parts into it, I'm sure he knew all what he was doing. I've spent alot of time straightening things out. The Vac advance looks new, so I'm guessing he did pull it out. I'm sure the firing order is right and the cap and rotor look fine. the timing mark is currently way to the left or counterclockwise of the scale. You can barely see it where it is at.
 
Nixon said:
Thanks guys for your help. I should have mentioned it is a AMC 258 i6 / 4.2l 6cyl. I'm not sure the dist is in right. The guys I bought it from started tinkering and while he did put some nice parts into it, I'm sure he knew all what he was doing. I've spent alot of time straightening things out. The Vac advance looks new, so I'm guessing he did pull it out. I'm sure the firing order is right and the cap and rotor look fine. the timing mark is currently way to the left or counterclockwise of the scale. You can barely see it where it is at.
Click to expand...
If he pulled the dist and put it back in wrong - that is your problem. If you turn the engine over to Top Dead Center (the timing mark on the balancer at zero), is the rotor facing #1? If it is facing towards #6 then you need to turn the engine over 360 degrees.


Now that the rotor is some what facing #1, is it facing directly at the location for #1 on the cap? If not, you need to pull the dist and rotate the gear one tooth at a time until it is.
 
Nixon said:
I am having a heck of a time with my Cj. It ran O.K. when I brought it home, but needed a tune up. I replaced wires rotor cap plugs etc. When I went to time it, the marks were not even close. .
Click to expand...


Nixon you say it ran ok when you brought it home.
If you didn't remove the dist... Are you sure your wires are on right.:rolleyes:

Your timing chain might have jumped a tooth or two also.
 
Well, I'm about 99% sure My timing chain jumped. I guess I'll be tearing into it this weekend. On a better note, I'm sure it will ru much better. Thanks for all you guys help. Any tips? I'll let you know how it goes.
 
Nixon said:
Well, I'm about 99% sure My timing chain jumped. I guess I'll be tearing into it this weekend. On a better note, I'm sure it will ru much better. Thanks for all you guys help. Any tips? I'll let you know how it goes.
Click to expand...
No big advice except - just get a good steel assembly... :)
 
Well, I got the timing chain and gears replaced. The marks were pretty lined up. It didn't skip a tooth. The gears were a little worn and the chain was streched. I got it all back together. Not much difference. I can't even get the timing mark anywhere near the scale. It's way advanced!! I'm starting to think the dist is in wrong. Not sure how to go about his yet. I was thinking about turning engine over till the marks line up and pulling the #1 plug to make sure i's on comp. stroke. then see where rotor is and possible pulling dist out and realligning. Am I on the right track? Not sure what else would make the marks be so off. It won't run if I line the mark up.
 
I had a nother thought. Has anyone ever heard of the harmonic balancer metal ring moving on the rubber one?
 
that is very common on CJ's that is why you will have to set the timing by the site I posted for you :chug: .
just make sure the #1 piston is on the proper up stroke for fire and not exhaust and rotor is facing the number one plug wire on distributor.
 
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