In order to determine whether there is a spark, you need to remove the high-voltage wire from the middle of the ignition distributor cap, bring it approximately 10 mm to the ground (engine) and turn the crankshaft with the starter. If a spark jumps, unscrew the spark plug, insert it into the tip, connect it to ground and turn the crankshaft again with the starter. If there is no spark, find the fault using the table below.
Caution! When connecting high-voltage wires, remember the cylinder firing sequence (1-43-2). Remove the distributor cap; there is a mark on the distributor housing. When the cover is installed, there is a wire to the 1st cylinder above this mark. High voltage wires for cylinders 4, 3 and 2 are arranged clockwise. When measuring the voltage at terminal 15 of the ignition coil using a voltmeter, the following measures must be taken to prevent electrical breakdown:
Connect the voltmeter to terminal 15 of the ignition coil and to ground.
Connect the auxiliary wire to terminal 1 of the ignition coil and to ground.
Turn on the starter and measure the voltage at the moment of starting.
The voltage must be at least 9 V. To check the distributor rotor, which has radio interference protection, an ohmmeter is required.
Connect the ohmmeter as shown in the figure and measure the resistance. It should be a maximum of 10 kOhm. The resistance of the high-voltage wires, including the spark plug tip, is checked in the same manner. The resistance of each high-voltage wire, including the tip, must be no more than 10 kOhm.
Problem: The engine starts poorly or does not start at all
| Cause | Solution |
| The launch is not performed correctly | At temperatures below 0°C: Slowly depress the accelerator pedal once and release it. Turn on the ignition and immediately engage the starter without pressing the accelerator pedal |
| At temperatures above 0°C: When starting, slowly press the accelerator pedal | |
| If the engine is hot: press the accelerator pedal all the way down and start the engine. After starting, immediately release the pedal | |
| No spark. Distributor cap is wet or dirty | Clean and dry the lid, treat it with a special aerosol |
| Cracks and burn marks in the distributor cap | Replace the cover |
| The carbon contact in the distributor cap is worn out | Replace the contact |
| The gap in the breaker contacts is too large or too small | Adjust the gap |
| The breaker contacts are burnt out | Replace contacts |
| The ignition distributor rotor is faulty | Replace the runner |
| The resistance of the ignition distributor rotor is too high | Replace the runner |
| The resistance of the high-voltage wire or spark plug tip is too high | Replace the wire or tip |
| The tips are installed in the wrong order | Install the tips correctly |
| Spark plugs are flooded with gasoline due to numerous starting attempts | Dry the candles |
| The spark plugs are wet or dirty on the outside | Clean and dry the candles, put protective caps on them and their tips |
| The ignition coil power is too low | Check the coil wires for tightness of connection and reliable contact |
| Too little (less than 9 V) voltage at terminal 15 of the ignition coil | Charge the battery, restore contact between the battery and the body or the gearbox and the body, eliminate the voltage drop between the battery, the light switch and terminal 15 |
| The ignition coil has cracks and traces of burning | Replace the coil |
| Voltage drop due to electrical connections and wires coming into contact with the engine | Lay electrical wires correctly |
| The capacitor in the ignition distributor has poor contact or is faulty | Fix the capacitor or replace it |
| The ignition timing is offset | Adjust the ignition timing |
| The starter turns too slowly | Charge the battery, fill it with all-season oil in the cold season, check the starter |
| The valve clearance is incorrectly adjusted | Adjust the gap |
| Insufficient compression in the engine cylinders | Adjust valve clearances, repair the engine |
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