Audi 80 Quiz
Ignition System

Retarded ignition

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

In other situations, the ignition timing must be shifted toward retarded ignition. In this case, ignition occurs only when the piston has already passed TDC well past. Thus, ignition takes place practically during the exhaust stroke, which improves exhaust gas composition but reduces engine power. Accordingly, retarded ignition is the only correct setting, for example, when the engine is operating in overrun mode (for example, when driving downhill with the accelerator pedal released).

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