Section 134 (MULTIPORT Fuel Injection (MFI) - 4.2L V8 (AKB, Aux, AYS))
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2003 Audi S8, 2003 Audi A8, 2002 Audi S8, 2002 Audi A8, and 2001 Audi S8. However, it is still accessible from the selected car via links, so may be relevant.
- Multiport Fuel Injection (MFI)
- Motronic Multiport Fuel Injection (MFI) system, servicing
- Safety precautions
- Rules for cleanliness
- Technical data (A8 vehicles)
- Technical data (S8 vehicles)
- Component locations, overview
- Wiring and component check with VAG1598/31 test box
- Motronic Engine Control Module (ECM) -J220- (without metal anti -theft housing), replacing
- Motronic Engine Control Module (ECM) -J220- (with metal anti -theft housing), replacing
- Motronic Engine Control Module (ECM) Power Supply Relay -J271-, checking
- Notes
- Checking activation of the ECM power supply relay
- Activating Cruise Control System (CCS)
- Idle speed, checking
- Fuel pressure regulator and residual fuel pressure, checking
- Fuel injection volume, fuel injector leakage and spray pattern of injectors, checking
- Fuel injectors, checking
- Fuel Pump (FP) relay -J17- and relay activation, checking
- Mass Air Flow (MAF) sensor -G70-, checking
- Intake Air Temperature (IAT) sensor -G42-, checking
- Engine Coolant Temperature (ECT) sensor -G62-, checking
- Oxygen sensor control, checking
- Oxygen sensor control, function
- Oxygen sensor and oxygen sensor control before Three Way Catalytic Converter (TWC), checking
- Oxygen sensors aging, oxygen sensor before catalytic converter, checking
- Oxygen sensor and oxygen sensor control behind catalytic converter, checking
- Oxygen sensor heater for oxygen sensor, checking
- Oxygen sensor signal wire and activation, checking
- Checking wiring for Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) -G130 -
- Oxygen sensors, removing and installing
- Intake manifold change-over, checking (A8 vehicles)
- Intake manifold change-over, checking (S8 vehicles)
- Evaporative Emission (EVAP) system, checking
- Evaporative Emission (EVAP) Canister Purge Regulator Valve -N80-, checking
- Secondary Air Injection (AIR) Solenoid Valve -N112-, checking
- Secondary Air Injection (AIR) pump relay -J299-, checking
- Electronic Engine Power Control (EPC) warning light, checking
- Throttle valve control module -J338-, checking
- Throttle valve control module, adaptation
- Angle sensor -1- for throttle drive (power accelerator actuation) -G187- and angle sensor -2- for throttle drive (power accelerator actuation) -G188-, checking
- Electronic Engine Power Control (EPC) warning light in instrument cluster, significance
- Throttle Position (TP) sensor -G79- and sender -2- for accelerator pedal position -G185-, checking
- Brake light switch -F- and brake pedal switch -F47-, checking
- Additional signals, checking
- A/C compressor shut-off, checking
- Crash signal, checking
- Motronic Multiport Fuel Injection (MFI) system, servicing