1. If the engine turns over with the starter but does not start, remove the high voltage wire from either spark plug and, using a tool with insulated handles, place the end of the wire 6mm from ground.
2. Cranking the engine with a starter, check that a spark jumps between the wire and ground.
3. If a spark is present, then voltage is applied to the spark plug. Similarly check up presence of a spark on other cylinders.
4. If there is no spark and there is moisture on the distributor cap, dry the distributor cap and rotor, reinstall them and repeat the test.
5. The tensioner shoes must rotate freely on the axles. If they have cracks, chips or significant wear on the working surface, they must be replaced.
6. If there is still no spark, remove the center high voltage wire from the distributor cap and place the end of the wire 6mm from ground and retest.
7. If a spark appears, then the high-voltage wires to the candles, the cover or the distributor rotor are faulty.
8. If there is still no spark, check the connection of the primary winding of the ignition coil and the voltage supply to the ignition coil from the ignition switch.
9. If there is still no spark, check the integrity of the central high voltage wire by measuring its resistance or replacing the wire.
10. If there is still no spark, then the ignition control unit is faulty (switch).