Working On Fuel System
WARNING: This page is about a different car, the 2011 Audi Q7, 2010 Audi Q7, and 2009 Audi Q7. However, it is still accessible from the selected car via links, so may be relevant.
Note the following when working on the fuel system:
WARNING:
There is a risk of injury because the fuel is under pressure.
- Place clean rags around the connection before opening the system. Then release pressure by carefully loosening the connection.
- Wear safety gloves
- Wear protective eyewear.
Very hot fuel can burn your skin.
- The temperature of the fuel lines and may reach 100 °C after stopping the engine. Let the fuel cool down before opening any line connections otherwise there is a danger of scalding.
- Wear safety gloves
- Wear protective eyewear.
To prevent personal injury and damage to the injection and pre-glow system, observe the following:
- The ignition must be switched off before connecting or disconnecting injection and preglow system wiring or tester cables.
- Wash the engine only when the ignition is turned off.
- If the engine was started while the electrical connectors were disconnected, faults will be stored in the engine control module: "check the DTC memory" in "OBD" Vehicle Diagnostic Tester.
CAUTION:
Danger of causing damage to other electronic components when disconnecting the battery.
- Complete the steps for disconnecting the battery.
- Always turn off the ignition before disconnecting the battery.
-- Disconnect the battery. Refer to BATTERY, DISCONNECTING AND CONNECTING .