The engine does not start
| Cause of malfunction | Method of elimination |
| 1. The switch does not receive voltage pulses from the contactless sensor: | 1. Do the following: |
| - break in the wires between the ignition distributor sensor and the switch; | - check the wires and their connections; replace damaged wires; |
| - the contactless sensor is faulty. | - check the sensor using an adapter connector and a voltmeter; replace the faulty sensor. |
| 2. No current pulses are sent to the primary winding of the ignition coil: | 2. Do the following: |
| - a break in the wires connecting the switch to the relay or to the ignition coil; | - check the wires and their connections; replace damaged wires; |
| - the switch is faulty; | - check the switch with an oscilloscope; replace the faulty switch; |
| - the ignition switch or relay does not work. | - check, replace the faulty contact part of the switch or ignition relay. |
| 3. High voltage is not supplied to the spark plugs: | 3. Do the following: |
| - high voltage wire tips are loose in their sockets, have come off or are oxidized; the wires are heavily contaminated or their insulation is damaged; | - check and restore connections, clean or replace wires; |
| - wear or damage of the contact carbon, its sticking in the cover of the ignition distributor sensor; | - check and replace the contact carbon if necessary; |
| - current leakage through cracks or burnouts in the cover or rotor of the ignition distributor sensor, through carbon deposits or moisture on the inner surface of the cover; | - check, clean the cover from moisture and carbon deposits, replace the cover and rotor if they have cracks; |
| - burnout of the resistor in the ignition distributor sensor rotor; | - replace the resistor; |
| - the ignition coil is damaged. | - replace the ignition coil. |
| 4/The spark plug electrodes are oily or the gap between them is not within the norm. | 4. Clean the spark plugs and adjust the gap between the electrodes. |
| 5. Spark plugs are damaged (crack in the insulator). | 5. Replace the spark plugs with new ones. |
| 6. The order of connecting high-voltage wires to the terminals of the ignition distributor sensor cover is violated. | 6. Connect the wires in the firing order 1-3-4-2. |
| 7. Incorrect ignition timing. | 7. Check and adjust the ignition timing. |
Engine runs rough or stalls at idle
| Cause of malfunction | Method of elimination |
| 1. Too early ignition in the engine cylinders. | 1. Check and adjust the ignition timing. |
| 2. Check and adjust the gap between the electrodes. | 2. Large gap between spark plug electrodes. |
The engine runs unevenly and unstably at high crankshaft speeds
| Cause of malfunction | Method of elimination |
| 1. The springs of the ignition timing regulator weights in the ignition distributor sensor have weakened. | 1. Replace the springs, check the operation of the centrifugal regulator on the stand. |
[The original can be seen on the website VazBook]
Engine misfires in all modes
| Cause of malfunction | Method of elimination |
| 1. The wires in the ignition system are damaged, the wire fastening is loose or their tips are oxidized. | 1. Check the wires and their connections. Replace damaged wires. |
| 2. Wear of electrodes or oiling of spark plugs, significant carbon deposits; cracks in the spark plug insulator. | 2. Check the spark plugs, adjust the gap between the electrodes, replace damaged spark plugs. |
| 3. Wear or damage to the contact carbon in the ignition distributor sensor cover. | 3. Replace the contact carbon. |
| 4. Severe burning of the central contact of the ignition distributor sensor rotor. | 4. Clean the center contact. |
| 5. Cracks, contamination or burnouts in the rotor or cover of the ignition distributor sensor. | 5. Check, replace the rotor or cover. |
| 6. The commutator is faulty - the pulse shape on the primary winding of the ignition coil does not correspond to the norm. | 6. Check the switch with an oscilloscope, replace the faulty switch. |
The engine does not develop full power and does not have sufficient throttle response
| Cause of malfunction | Method of elimination |
| 1. Incorrect ignition timing. | 1. Check and adjust the ignition timing. |
| 2. Seizure of ignition timing regulator weights, weakening of weight springs. | 2. Check and replace damaged parts. |
| 3. The commutator is faulty - the pulse shape on the primary winding of the ignition coil does not correspond to the norm. | 3. Check the switch with an oscilloscope, replace the faulty switch. |