Fuel System Schematic Overview
WARNING: This page is about a different car, the 2016 Audi Q5, 2015 Audi Q5, and 2014 Audi Q5. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
Danger of malfunction caused by dirt.
- Refer to FUEL SUPPLY SYSTEM SAFETY PRECAUTIONS .
Follow the points below to avoid running the high pressure fuel pump dry (very low tolerances) and to start the engine quickly after replacing the components:
- If fuel system components between the fuel tank and high pressure fuel pump were removed or replaced, the fuel system must be bled. Refer to FUEL SYSTEM, FILLING/BLEEDING .
- If the high pressure fuel pump was removed or replaced, then bleed the fuel system before starting the engine for the first time. Filling the fuel for the first time. Refer to FUEL TANK, FILLING WITH FUEL AFTER INSTALLING HIGH PRESSURE PUMP .
NOTE:
If these instructions are not followed, the high pressure pump will be damaged during the first filling.
- Fuel Metering Valve -N290-
- Do not open
- High Pressure Pump
- Overview, refer to HIGH PRESSURE PUMP OVERVIEW
- Fuel Rail
- For cylinder bank 1 (right)
- Fuel Pressure Regulator Valve -N276-
- Cannot be used again
- Removing and installing, refer to Fuel Pressure Regulator Valve -N276-, REMOVING AND INSTALLING .
- Tightening specification, refer to Figure
- Fuel Pressure Sensor -G247-
- Tightening specification, refer to Figure
- Removing and installing, refer to Fuel Pressure Sensor -G247-, REMOVING AND INSTALLING
- Fuel Rail
- For cylinder bank 2 (left)
- Fuel Injector
- Removing and installing, refer to FUEL INJECTORS, REMOVING AND INSTALLING
- Fuel Supply Hose
- Do not disassemble
- Replace completely along with the restrictor
- Restrictor
- There is remaining pressure in the fuel supply hoses
- Not able to be replaced separately; replace the fuel supply hoses if they are faulty
- Checking, refer to FUEL RETURN LINE RESTRICTOR, CHECKING
- Transfer Fuel Pump -G6-
- Fuel Filter