There is another thing. A cracked distributor cap can act up if there is any moisture, cure itself when it gets colder. Careful where you buy gas. Well. Gas tanks get water in them. Some dealers fight this problem, others just sell the water to their customers. Not too sure what to tell you, but I'd stay away from the nobrand and cutprice dealers. On the other hand, some of these guys sell so much gas that the quality is pretty decent. I buy my gas from an obsessive-compulsive. He lies awake at night fretting about having water in his tanks and tests for it almost every day.