System Spark Test

NOTE: Do not perform this test on Mercedes-Benz vehicles. Use an oscilloscope to check spark results on Mercedes-Benz.

If starter turns but engine will not start or if engine fails to develop sufficient power), hold distributor end of coil wire about 3/8" (10 mm) from engine block. Crank engine. See Fig 1.

Fig 1: Coil Wire Hookup For Making an Ignition System Spark Test
Courtesy of NOT AVAILABLE

Do not use this test on Mercedes-Benz models.
If spark jumps gap, check distributor cap, rotor, cables and spark plugs. Be sure ignition timing and fuel system are OK. If no sparks occur, perform the following tests.