Fuel Line To Metering Pump, Bleeding

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NOTE:

After working on the fuel delivery unit, the fuel supply line to the metering pump must be bled on equipment levels with a parking heater.

Special tools and workshop equipment required

Suction Pump:VAS 5226

Fig 1: Identifying Diesel Extractor VAS 5226
Courtesy of AUDI
Hand Vacuum Pump:VAS 6213

Fig 2: Hand Vacuum Pump VAS 6213
Courtesy of AUDI

Procedure

Fig 3: Identifying Metering Pump -1- And Fuel Supply Line -2-

Courtesy of AUDI

Parking heater switched off.

-- Connect the Suction Pump:VAS 5226 to the compressed air.

-- On the metering pump -1- remove the fuel supply line -2- from the fuel tank.

-- Connect the Suction Pump:VAS 5226 with the adapter from the Hand Vacuum Pump:VAS 6213 to the fuel supply line and bleed it by extracting briefly.

-- Re-install the fuel supply line to the metering pump.

-- Switch on the parking heater and let it run approximately 10 minutes at full load.