Ignition Checks: Spark

Crank engine, checking for spark at coil wire and each spark plug wire using Spark Tester (J-26792). If spark exists at some spark plug wires, check for defective distributor cap and/or defective rotor. Check spark plug high tension wire resistance. Resistance of spark plug high tension wires should not exceed 25,000 ohms. Replace spark plug high tension wires if resistance exceeds specification.