Snowing today and the wet air seems to have made it a little worse. After dark opened the hood and did not see a nice light show (like spark plug wires arcing), But did notice a sound like an plug arcing when the miss occured. useing a half inch hose I placed one end to my ear and the other around the wires. I noticed a louder zap at the coil wire to the cap and at the coil it self. Both coil and cap male connector for the coil wire had corrosion. cleaned with a small brass brush. will have to test tomorrow. Would this little corrosion cause enough resistance to make a coil work harder