Spark (Coil)

Check for spark at coil wire. Hold wire approximately 1/4" away from an engine ground and crank engine. If spark is produced, coil is okay. If not, use a voltmeter and check voltage at negative side of coil while cranking engine. If voltage does not fluctuate, check coil wiring, power transistor (if equipped), ECU and distributor assembly. If voltage fluctuates, check coil wire and connections.