Capacitor — removal, inspection and installation (Peugeot 305)

1. The capacitor acts as a "buffer" in the low voltage circuit, softening the current pulses generated when the breaker contacts close and open. This reduces sparking at the contacts and promotes the rapid disappearance of the magnetic field generated by the primary winding of the coil. If the capacitor fails, the voltage supplied to the spark plugs will decrease. Problems with starting the engine and interruptions in its operation under load may indicate a faulty capacitor.

2. Release the distributor cap clamps and remove the cap. Remove the runner from the roller.

3. Ducellier distributor. Disconnect the capacitor wire by pulling it out of the connector. Loosen the capacitor mounting screw and remove the capacitor (see photo).



4. Paris-Rhone distributor. Disconnect the low voltage wire of the distributor from the terminal on the ignition coil and remove the spring clamp (5) (see B/Figure 4.4). Loosen the screw securing the locking plate of the insulating block, remove the plate and pull the insulating block out of the distributor housing. Loosen the capacitor mounting screw, being careful not to drop the distributor cap clamp, and remove the capacitor along with the wires.



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5. Without special equipment, the capacitor can only be tested by trial replacement. There is, however, one simple method of checking: manually open the breaker contacts with the ignition on. If a strong blue spark jumps between the contacts, the capacitor is faulty. A weak spark is normal.

6. The capacitor is installed in reverse order. Tighten the mounting screw(s) securely.