1. Wipe the inside and outside of the distributor cap. Replace cover with cracks, traces of breakdown (very thin cracks), chipped or badly worn contacts. The contact angle must move freely inside the lid.
2. If the contact coal is chipped, cracked, badly worn or the coal spring is broken, then it must be replaced.
3. Replace the runner with cracks, traces of burning, significant wear or corrosion of the outer contact.
4. The slider should fit snugly on the roller. This is provided by a leaf spring. A runner with a weakened or broken spring must be replaced.
5. Replace a clutch with severe pin wear.
6. The weights of the centrifugal regulator must be free to rotate on the axles.
Otherwise, the cause of the jam must be eliminated.
7. Replace the roller if it is badly worn or scored.
8. Inspect the bushings in which the roller rotates on both sides of the distributor housing. If there is scoring or significant wear on the bushings, replace the body and bushing assembly.
9. If the bushing is scoring or severely worn, replace the bearing plate.
10. To test the Hall sensor, assemble a circuit. The voltmeter must be with a measurement limit of at least 15 V and an internal resistance of at least 100 kOhm. Slowly turn the distributor shaft. In this case, the voltmeter should show a sharp change in voltage from the minimum (no more than 0.4 V) up to the maximum. The maximum voltage must not differ from the supply voltage by less than 3 V.