Audi 80 Quiz
Ignition System

What the ignition does

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

For a spark to jump across the electrodes of the spark plug in the combustion chamber, there must be a voltage of at least 30,000 V between the electrodes. The battery supplies only 12 V, so this voltage must be increased many times over. The spark lasts not tenths or hundredths but thousandths of a second. If it fires slightly too early or too late, ignition efficiency and therefore engine power will be reduced.

Test yourself

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