AUDI AUDI Engine Management & Fuel Systems

Question 1

What is the primary function of the Audi Motronic engine control module (ECM)?

Accepted Answer

Manages fuel injection, ignition timing, and emission controls

Answer

Controls only the transmission shift points

Answer

Operates the ABS hydraulic unit

Answer

Regulates interior climate control

Question 2

On an Audi TFSI engine, what does the 'FSI' component of direct injection mean operationally?

Accepted Answer

Fuel is injected directly into the combustion chamber at high pressure

Answer

Fuel is injected into the intake manifold

Answer

Fuel is pre-mixed with air before the throttle body

Answer

Fuel supply is gravity-fed

Question 3

Which Audi engine sensor measures the mass of air entering the engine to calculate fuel delivery?

Accepted Answer

Mass airflow (MAF) sensor

Answer

Manifold absolute pressure (MAP) sensor

Answer

Throttle position sensor (TPS)

Answer

Coolant temperature sensor (CTS)

Question 4

What condition does a negative long-term fuel trim (LTFT) value indicate on an Audi?

Accepted Answer

The engine is running rich and reducing fuel delivery

Answer

The engine is running lean and adding fuel

Answer

The oxygen sensor has failed

Answer

The exhaust gas recirculation valve is stuck closed

Question 5

On Audi TFSI engines, what common issue is caused by carbon buildup on the intake valves?

Accepted Answer

Rough idle, misfires, and reduced power due to restricted airflow past valves

Answer

Oil pressure drops rapidly

Answer

Transmission slipping

Answer

Power steering failure

Question 6

What does the Audi high-pressure fuel pump (HPFP) pressure sensor monitor during engine operation?

Accepted Answer

Actual rail pressure versus commanded rail pressure

Answer

Return fuel temperature

Answer

Fuel tank level

Answer

Crankcase pressure