Audi 80 Quiz
KE-III-Jetronic Injection System

Visual inspection

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

PROCEDURE

First check the air ducts for leaks. Inspect all hoses, from the thick air intake duct to the thin vacuum hoses.

Are the sealing gaskets under the cold start valve and on the injection nozzles, as well as the intake manifold flange gaskets, in good condition?
Leaking points allow unmetered air, i.e., air that is not registered by the air flow sensor and therefore significantly disturbs mixture preparation. The mixture becomes uncontrollably lean. The result is engine malfunctions and rough idle.

Can a leak in the fuel line be detected?
Have the wire connectors been repeatedly disconnected and reconnected? Corrosion or improper handling can lead to insufficient contact.

Carefully inspect the connectors of the individual fuel injection system components. Do not bend the contact tabs; only treat them with contact spray.

Test yourself

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