Audi 80 Quiz
Mono-Motronic Injection System

Checking fuel pressure

In this manual: Mono-Motronic 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

Fuel supply pressure can only be accurately checked with a workshop pressure gauge.

If incorrect fuel pressure is suspected, disassemble the fuel pressure regulator: remove the 4 Torx screws.

Check whether the diaphragm is damaged and whether there are contaminating deposits.

Test yourself

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