Table of contents: The engine does not start ↓ Misfires ↓
1. Contactless ignition systems are generally very reliable. Damage is most likely due to poor contact or oxidation.
2. Checking the ignition spark using the old method of holding the end of the high voltage wire at a short distance from the block is not recommended by manufacturers, as it can damage the coil insulation.
The engine does not start
3. If the ignition system appears to be faulty, use a multimeter to check for full battery voltage in the high voltage ignition circuit and the ignition IC in the distributor on the black and white (or black and red) wire. If the battery voltage is low, check the circuit from the battery through the ignition socket to the distributor and the high-voltage winding of the coil, and eliminate any damage found.
4. With the ignition on, check the battery voltage at the blue wire of the ignition module. If the battery voltage is insufficient, check the primary winding of the coil. Replace the coil if it is faulty.
5. To check the integrated ignition unit, disconnect the distributor ground wire, connect a voltmeter between the distributor ground clamp and the negative battery terminal (measure positive voltage drop), disconnect the ignition coil high voltage wire from the distributor cap and ground it, measure the voltage by reading it while turning the engine with the starter for ten seconds.
6. If the result is 0.5 V or less, replace the ignition IC. If the result is greater than 0.5 V, check the distributor and engine grounds, as well as the negative battery terminal connection to the chassis ground.
7. The operation of the integrated ignition unit can only be directly tested by replacing a new component.
8. The above checks will reveal any damage in the low voltage circuit. Check the high voltage circuit as described below.
Misfires
9. Irregular misfires may be due to loose connections or an open in the low-voltage circuit of the system, or due to damage to the high-voltage circuit at the distributor rotor.
10. Check the reliability of the ignition distributor connections.
11. Check that the ignition coil cover, distributor cap and high tension wires are clean and dry. Measure the resistance of the high tension wire from the coil to the distributor cap.
12. Inspect the inside of the distributor cover and distributor rotor.
13. Regular ignition cut-off may be due to damage to the distributor cap, high-tension wires or spark plugs.
14. If there is no high voltage on any one wire, the fault may be in the wire itself or the cover of the breaker-distributor. If there is high voltage on all wires, the fault is in the spark plug.
15. If there is no high voltage on any spark plug, check the ignition coil windings. Replace the coil if it is faulty.