Whether there are any ignition sparks at all can be determined by a simple high voltage test.
A careful visual inspection can often reveal the cause of the problem.
Are all wire connections and plug contacts in the coil tight? (transformer) ignition, distributor or in the mounting block.
Is an individual contact in a multi-pin plug loose?.
Is there a resinous mass protruding from the ignition coil or from the ignition coil part on the transformer. In this case, it is damaged.
Are there any signs of damage on the distributor cap? Pay attention, first of all, to its inner side.
Are all ignition system parts clean and dry?.
Wet dirt can cause voltage leaks.
Additionally, check high-voltage wires for tightness and insulation damage.
Electronic ignition systems, due to the high voltages in them, are very sensitive to spark jumping and leakage currents.
Lastly, you need to check the ignition.
Only now check the ignition coil/transformer and the Hall sensor.
Caution: Connect and disconnect control and measuring devices only when the ignition is switched off.
Is there high voltage?
Right at the beginning, you need to check whether the ignition system produces sparks at all.
Remove the spark plug plug and unscrew the spark plug.
Put the plug back on the spark plug and place it on the engine block so that there is good contact with the ground. It is even better to connect the threaded part of the spark plug with an auxiliary wire to the engine.
The assistant should turn the engine over with the starter.
If powerful sparks jump between the spark plug electrodes, then high voltage is present, but the ignition timing may be disrupted.
If there are no sparks, then you need to check the spark plugs of other cylinders.
If there are still no sparks, then the entire ignition system needs to be checked.