1) Check the point gap. The point gap is the distance between the contact points on the distributor. If the gap is too large or too small, the points will not be able to open and close properly, which can cause a variety of problems, including misfiring, stalling, and poor fuel economy.
2) Check the point condition. The points should be clean and free of corrosion. If the points are pitted, worn, or damaged, they will need to be replaced.
3) Test the point resistance. The point resistance is the electrical resistance between the contact points. If the resistance is too high, the points will not be able to conduct electricity properly, which can also cause problems, such as misfiring, stalling, and poor fuel economy.
To test the point resistance, you will need a multimeter. Set the multimeter to the ohms setting and place the probes on the contact points. The resistance should be between 0.4 and 0.6 ohms. If the resistance is higher than this, the points will need to be replaced.
If you are unsure how to check the point gap, point condition, or point resistance, you can have a mechanic do it for you.