High-Tension Leads

The high-tension part of the ignition system includes, along with the ignition coil and distributor (already discussed), the high-tension leads, the lead connectors with interference suppression resistors and, of course, the spark plugs.

The thick connecting leads running from the ignition coil to the distributor, or from the distributor to the spark plugs (models with 6-cylinder engine without distributor), usually cause no problems. They must be firmly inserted with their connectors containing interference suppression resistors (radio interference suppression) into the sockets of the distributor cap. Their plug connections must not be oxidized, and they must make good contact with the spark plug connectors.

If the high-tension leads have become stiff and brittle, new ones must be installed. For the 6-cylinder engine they can be purchased as a set with both connectors.

For 4- and 5-cylinder engines, purchase the required length of stranded flexible copper high-voltage wire and the corresponding brass terminals for the cable ends at a parts store. Crimp the brass terminals onto the cable ends, then push on the spark plug connectors and the connectors with interference suppression resistors until they lock into place.

Tip: Leaks in high-voltage wires are easy to spot by looking into the engine compartment at night with the engine running. Ignition sparks jumping across the cable are then clearly visible. Faint flickering light moving along the cable, on the other hand, is completely harmless.