audi Workshop Repair Guides

Audi Workshop Service and Repair Manuals

Fitting locations overview > < Rules for cleanliness
Motronic injection and ignition system (6-cylinder)
Servicing Motronic injection system
Technical data

Engine code letters

ACK (2.8 ltr. / 5V / 142 kW engine)
ALG (2.8 ltr. / 5V / 142 kW engine
with secondary air system)

Idling speed
Not adjustable - controlled by idling speed stabilisation


Front-wheel drive


740...860 rpm

On vehicles with four-wheel drive the idling speed may increase to between 740 and 860 rpm when the battery voltage is low.


Four-wheel drive


620...740 rpm

Engine speed limitation
by switching off the injectors


6500 rpm

Fuel pressure at idling speed

Vacuum hose
connected


approx. 3.2 ... 3.8 bar

Vacuum hose
disconnected


approx. 3.8 ... 4.2 bar

Holding pressure after 10 minutes

Engine cold

approx. 2.2 bar

Engine warm

approx. 3.0 bar

Injectors

Spray pattern

Two-hole injector

Injection qty. (30 s)

90 ... 125 ml

Resistance
(room temperature) 1)


13.5 ... 15.5 ω

1)    When the engine is at operating temperature the resistance is increased by approx. 4...6 ω.

Fitting locations overview > < Rules for cleanliness