A6 Quattro Sedan V8-4.2L (BVJ) (2007)
-
Using a Multimeter , check the Fuel Metering Valve (N290) terminals 1 to 2 for resistance
Specified value: 450 to 1000 ohms.
If the specified value was not obtained:
-
Replace the High Pressure Fuel Pump.
If the specified value was obtained:
Checking voltage
Crank the engine.
-
Using a Multimeter, check the Fuel Metering Valve (N290) electrical harness connector terminal 1 to Ground (GND) for voltage.
Specified value: battery voltage.
-
Switch the ignition off.
If the specified value was not obtained:
-
Check the wiring from the Fuel Metering Valve (N290) electrical harness connector terminal 1 to the Engine Component Power Supply Relay
(J757) socket 2/87 for a short circuit to Ground (GND), or an open circuit.
-
Check the electrical harness connector for damage, corrosion, lose or broken terminals.
-
If necessary, repair the wiring connection.