Audi 80 Quiz
Ignition System

Spark plug connectors, connectors with interference suppression resistors

In this manual: Ignition System
Technical Description — 39Engines — 41Exhaust System — 13Cooling System — 28Fuel tank and fuel pump — 12Air Filter and Intake Ducts — 13Mono-Motronic Injection System — 18Digifant Injection System — 19KE-III-Jetronic Injection System — 35MPI and MPFI Injection Systems — 32Clutch — 11Transmission and Driveline — 21Suspension and Steering — 33Brake System — 41Anti-lock brake system — 8Wheels and Tires — 13Body Electrical System — 35Ignition System — 24Lighting — 14Signaling Devices — 7Instruments and Auxiliary Equipment — 54Heating and Ventilation — 7Body Components — 18Troubleshooting — 6Specifications — 13
~1min read

Audi vehicles may only use specific spark plug connectors. Suitable connectors must have an internal resistance of 4–6 kOhm.

The same applies to the connectors with interference suppression resistors installed at the distributor and ignition coil connections. Their internal resistance must be 0.6–1.4 kOhm.

The distributor rotor must also have a specific interference suppression resistor of 0.6–1.4 kOhm. It is marked "R1".

Tip: If the engine constantly or intermittently (in wet weather) runs on not all cylinders, this is often caused by faulty spark plug connectors. Spark leaks through the insulating material between the metal housing and the high-voltage electrode. Otherwise, a connector usually cannot be checked for breakdown by appearance alone. To check, replace the connector with another one. Roadside help: remove the metal shield from the connector plug.

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A quick Audi 80 quiz: every answer comes with an explanation and a link to the manual page.