34’ - Weak Spark Troubleshooting

[dbtenner]

Hey I would like some assistance and have other opinions. I’ll start from the beginning and try to make this brief...

In December last year I had an issue where my condenser played out, no problem I changed it out. Then in March I had an issue where I was misfiring. I had it looked at by an individual and he noticed I had a very weak spark and suggested that I have the distributor and coil rebuilt but he went ahead and cleaned the spark plugs and drove fine. Now 8 months later, I am noticing the same symptom where it appears to be missing occasionally and lots of carbon built up on the plugs just as in March.

Here is my opinion, either....
1. The condenser I changed out isn’t rated for a Model B and that is the reason for a weak spark. I have a spare condenser of a different brand that I’ll swap this weekend to see. Is there a rating I can check for on my voltmeter to make sure it’s fine?

2. What should the voltage be at the end of the ignition wire that on the coil? It could be that the resistor is too much. This is a variable that has not been changed so I doubt it.

3. The distributor may need to be rebuilt, it’s delivering a weak spark which it unable to detonate at higher temperature this leading to high carbon deposits on the spark plug. I checked the spark yesterday and it was barely nothing as I grounded it to header. Not good spark.

4. The coil may need to be rebuilt.


I have gone ahead and cleaned the plugs and reinstalled it. I’ll test to see if it runs smoother and if I have a better spark when I ground the spark plug.

Please weigh in on which opinion you agree with. Thanks!!!


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