Fuel System, Bleeding

Special tools and workshop equipment required

Fuel Injection Gauge Kit - Fuel Bleeder 20 VAG1318/20
Suction Pump VAS5226
Vehicle Diagnostic Tester

Perform the Following

NOTE:

If fuel supply system was opened, it must always be bled before starting engine.

If fuel supply system is not bled, catalytic converter will be damaged.

Follow the guidelines for clean working conditions, refer to CLEAN WORKING CONDITIONS .

WARNING:

Fuel system is under pressure!

Wear protective eyewear and protective clothing in order to avoid injury and contact with the skin.
Wrap a cloth around the wiring connections before loosening hose connections. Then release pressure by carefully pulling off the line.

-- Turn valve at T-piece counterclockwise until it is completely open.

Fig 1: Identifying V.A.G 1318/20-1 & V.A.G 1318/20

-- Attach the Adapter VAG1318/20-1 to the Fuel Injection Gauge Kit - Fuel Bleeder 20VAG1318/20.

-- Install the Fuel Injection Gauge Kit - Fuel Bleeder 20VAG1318/20 hand-tight on the bleeder valve.

-- Remove the cap -arrow- from the bleeder valve.

Fig 2: Locating Cap

-- Connect the hose from the Suction Pump VAS5226 as shown.

Fig 3: Identifying Suction Pump

-- Turn valve (at T-piece) clockwise into bleeder valve to stop.

-- Check the adapter and hose connection for leaks.

-- Connect the Vehicle Diagnostic Tester -1- .

Fig 4: Connecting Evaporative Emissions Tester To Vehicle

-- Connect the diagnostic cable connector -2- to the Data Link Connector (DLC) inside the footwell on the driver side.

-- On the touch screen, select the following:

OBD

OBD →

Engine Electronics →

Output Diagnostic Test →

-- Keep pressing → until the fuel pump relay activates. This activates the fuel pump.

-- Let the diagnosis run until fuel flows out of the ventilation valve without bubbles.

-- End the output diagnostic test.

NOTE:

If the output diagnostic test mode is interrupted, the engine must be started for a short time before the mode can be accessed again. Output diagnostic test mode is automatically cancelled after 60 seconds.

-- Turn valve at T-piece counterclockwise until it is completely open.

Fig 5: Identifying V.A.G 1318/20-1 & V.A.G 1318/20

-- Clamp off the hose from the Suction Pump VAS5226 (for example, using the Hose Clamps - Up To 25mm 3094) and remove it from the Adapter VAG1318/20-1.

-- Remove the Fuel Injection Gauge Kit - Fuel Bleeder 20VAG1318/20 from the bleeder valve.