Hi,<br /><br /> I have a 1964 Mercury 500 that I purchased recently. <br />It mostly runs off less than 4 cylinders and occationally would fire up on all 4 and go well.<br /><br /> I pulled out the leads to determine which one was missing, and thought I had it as # 4. I replaced the plug but it is still only firing on all cylinders occasionally. I have removed all the plugs and replaced them, but the miss still comes and goes. Where can I look next? It looks like the wires could be carbon. Could this be a source of problems? Could there be anything in the distributor that I should look at. I did not want to fiddle unneceseraly. Your help is appreciated.<br /><br />Willie
