Fuel System Specifications (Audi 80 B4)

Table of contents: Petrol engines ↓ Diesel engines ↓

Petrol engines

Fuel injection system Mono-Motronic

Engine letter designation - AVT

Speed (not regulated) — 750-1000 rpm

CO content (not regulated) — 0,2-1,2%

Fuel pressure at idle speed - 0.8-1.2 bar

System pressure 5 minutes after ignition is turned off - min. 0.5 bar

Nozzles

Injector resistance at air temperature (15-30°C) — 1.2-1.6 Ohm

Digifant fuel injection system

Engine letter designation - AVK

Speed (not regulated) — 820±50 rpm

CO content (on the tube) - 0.6±0.4%

Fuel pressure at idle

with the low air pressure hose removed - approx. 2.5 bar
with low air pressure hose attached - approx. 3.0 bar

System pressure 10 minutes after ignition is turned off - min. 2.0 bar

Nozzles

Injector resistance - 2-10 Ohm

Fuel injection system KE-lll-Jetronic

Engine letter designation - NG

Speed (not regulated) — 720-860 rpm

CO content (on the tube) - 0.1-1.1%

System pressure: 6.1 - 6.5 bar

Injection pressure - 4.3-4.6 bar

with the air-fuel mixture corrector plug disconnected - approximately 0.3-0.5 bar less than the system pressure
with the air-fuel mixture corrector plug connected and the ignition on - approximately 1.2-1.5 bar less than the system pressure

System pressure after ignition off