Audi 80 Quiz
KE-III-Jetronic Injection System

Do-it-yourself repairs

In this manual: KE-III-Jetronic Injection 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

Unfortunately, many checks of the injection system cannot be performed at home due to the lack of necessary test and measuring equipment. However, some work can still be done.

Procedure
The control unit cannot be checked with home equipment. Experience also shows that faults on the control unit side are extremely rare. Sensors, switches and wire connections fail much more often. Therefore, if a fault occurs, proceed as follows:

PROCEDURE

Check whether the ignition system is in order.

Check the fuel supply.

Perform a visual inspection of the injection system components (see next section).

If the fault is not found this way, review the fault list at the end of the chapter, or have the fault memory checked at a workshop. In this way, identify the possible source of the fault and check the suspect component using the test circuit diagram.

Test yourself

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