Back in '76, I worked as a tire changer at a local Goodyear store. An elderly lady brought her Buick Century in for repair. The engine had an intermittant miss. The mechanic that serviced the car was in training. I watched him install points ( no help), plugs and dist. cap ( again, no help), and plug wires ( Yawn, do you see a pattern). He then adjusted the carb. ( do I dare say it?). After all this, I walked over. I saw water puddling under the car. Upon further inspection, I noticed a tiny stream of water spewing from a heater hose. This stream would hit the dist. cap and cause the misfire. It would only happen after the engine was at operating temp (thermostat opened). They charged her for all parts installed when she only needed a 4' piece of 5/8 heater hose.