Intermittent Ignition (1 Viewer)

Joined
Feb 21, 2014
Messages
83
Location
Marietta, GA
I have had an intermittent idle/rough/backfire (pop, pop, pop) running issue for the past 6-8 months. I had been trying to track down if it was timing/carb/vacuum. After a lot of little things, including adjusting the carb and gapping the plugs and checking all the wires, the truck was running pretty well, I was pleased with it. That was probably 3 weeks ago, over the course of the 3 weeks the truck slowly began to run rough again, not horrible, but I was noticing that it wasn't running as well. Yesterday, the truck ran really rough, it was miss firing horribly and I turned around and parked it until I could look at it.

Today, I pulled all the plugs, they were all fouled. I cleaned and gapped again, the gaps were all wider than they should be. Started again, and it was still running rough. I pulled the distributer cap and made sure everything was moving freely in there. Started it up and it ran better, but still a little off, I reved it pretty high and it seemed to blow some carbon out, and it then ran great, like better than it ever has.

Since I have owned it it has always had a backfire problem on decelerations and a little bit when idling. When descending a mountain, it would just pop all the way down. I thought it was an exhaust manifold leak, but the problem is gone.

So that is the good news, that I found the source of the problem.

I checked the timing with a buddy and it was timed to TDC. Unfortunately, the distributer is stuck and will not rotate, when the bolt is loose.

I was thinking of putting a DUI or FJ60 big cap in to hopefully settle whatever the issue is. Any suggestions?

Any recommendation on breaking the distributer loose?

Is it a good idea to replace the distributer or try and repair it?

Thanks in advance.
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Joined
Oct 7, 2011
Messages
1,037
Location
Austin TX
What is the gap between the reluctor wheel and the pickup coil set at? In the photo it looks like a big gap. If so, you'll get intermittent spark and the plugs won't fire if they get dirty.
 

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