Everybody has to start somewhere Inside the plastic cover or dizzy cap of the distributor theres a plastic rotor arm with some metal contacts on it, this rotates and makes a contact with a set of small metal lugs (points) which then lead to each respective ht lead. The cap and arm can both be checked for corrosion and wear and replaced easily enough. i would also look at any earths around that area and a set on the back of the inlet manifold these can cause the same issue