Cause | Elimination Method |
Engine won't start | |
| Current does not pass through the breaker contacts: | |
| - dirty, oxidized or burnt contacts of the breaker; increased gap between contacts | - clean the contacts and adjust the gap between them |
| - loose or oxidized wire lugs in the low voltage circuit, breakage in the wires or circuit short circuit | – check wires and their connections; replace damaged wires |
| - Faulty switch (contacts do not close "30/1" And "15") or ignition relay | – check, replace the faulty contact part of the ignition switch or ignition relay |
| - broken capacitor | - replace the capacitor |
| - break in the primary winding of the ignition coil | – replace the ignition coil |
| The breaker contacts do not open: | |
| - the adjustment of the gap between the contacts of the breaker is violated | – adjust the gap between the contacts |
| - the textolite block or the bushing of the breaker lever is badly worn | - replace the contact group |
| - the bearing of the movable breaker plate has failed | – replace the bearing or ignition distributor |
| No high voltage applied to spark plugs: | |
| - Loosely planted in the sockets, the tips of the high voltage wires have come off or oxidized; wires are heavily soiled or their insulation is damaged | – check and repair connections, clean or replace wires |
| - wear or damage to the contact carbon, its hanging in the cover of the ignition distributor | – check and, if necessary, replace the contact carbon |
| - current leakage through cracks or burnouts in the cover or rotor of the ignition distributor, 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 |
| - the resistor in the rotor of the ignition distributor burned out | - replace the resistor |
| – damaged ignition coil | – replace the ignition coil |
| The spark plug electrodes are oily or the gap between them is not correct | Clean spark plugs and adjust electrode gap |
| Damaged spark plugs (cracked insulator) | Replace spark plugs with new ones |
| The procedure for connecting high voltage wires to the terminals of the ignition distributor cover is violated | Connect wires in ignition order 1-3-4-2 |
| Incorrect ignition timing | Check, adjust ignition timing |
| * The switch does not receive voltage pulses from the proximity sensor: | |
| - break in the wires between the sensor-distributor of ignition and the switch | – check wires and their connections; replace damaged wires |
| - Faulty proximity sensor | – Check up the gauge by means of an adapter socket and the voltmeter; defective sensor replace |
| * No current pulses are sent to the primary winding of the ignition coil: | |
| - a break in the wires connecting the switch to the switch or to the ignition coil | – check wires and their connections; replace damaged wires |
| - defective switch | – check the switch with an oscilloscope; replace defective switch |
Engine runs erratically or stalls at idle | |
| Too early ignition in the engine cylinders | Check, adjust ignition timing |
| Large gap between spark plug electrodes | Check, adjust the gap between the electrodes |
| Small gap between breaker contacts | Adjust the gap between the contacts |
The engine runs unevenly and unstably at a high crankshaft speed | |
| Weakened spring of the movable contact of the breaker | Replace contact group |
| Large gap between breaker contacts | Adjust the gap between the contacts |
| The springs of the weights of the ignition timing regulator in the ignition distribution sensor have weakened | Replace the springs, check the operation of the centrifugal regulator on the stand |
Interruptions in the operation of the engine in all modes | |
| Damaged wires in the ignition system, loose wires or oxidized wire tips | Check the wires and their connections |
| Dirty, oxidized, burnt or displaced breaker contacts | Clean the contacts and adjust the gap between them |
| Wear of electrodes or oiling of spark plugs, significant soot; cracked spark plug insulator | Check spark plugs, adjust gap between electrodes, replace damaged spark plugs |
| Wear or damage to the contact carbon in the cover of the ignition distributor | Replace the contact piece |
| Strong burning of the central contact of the ignition distributor rotor | Strip the center contact |
| Cracks, dirt or burnouts in the rotor or distributor cap | Check, replace rotor or cap |
| Reducing the capacitance of the capacitor or a break in it | Replace Capacitor |
| Excessively large runout of the ignition distributor roller; increased wear of the roller sleeve | Replace ignition distributor |
| * The switch is faulty - the shape of the pulses on the primary winding of the ignition coil does not correspond to the norm | * Check the switch with an oscilloscope, replace the defective switch |
The engine does not develop full power and does not have sufficient throttle response | |
| Incorrect ignition timing | Check, adjust ignition timing |
| Jamming of the weights of the ignition timing regulator, weakening of the springs of the weights | Check, replace damaged parts |
| Large wear of the bushing of the movable contact of the breaker | Check, replace contact group |
| * Faulty switch; the shape of the pulses on the primary winding of the ignition coil is not correct | * Check the switch with an oscilloscope, replace the defective switch |
* Faults related to the non-contact ignition system.