I have replaced the distributor,cap, rotor, wires, the fuel pump and filter, and the spark plugs and the problem still exist.When the car is rnnning it runs great, when it shuts off,I can wiggle the wires to the ignition switch and get it started "sometimes". I did do work on the ignition switch a few years ago.None of the items that I have replaced have affected the problem. If you have any suggestions, Please Help.