Fouled Spark Plug Check
- Remove distributor cap, leaving spark plug wires attached. Connect megohmmeter leads to engine ground and, in turn, to each spark plug wire terminal inside distributor cap.NOTE: If no megohmmeter is available, proceed to "Power Balance Check ".
- If resistance reading is greater than 50 megohms, proceed to "Spark Plug Wire Resistance Check ". If below 50 megohms, spark plugs are fouled and must be cleaned or replaced.