Skoda Workshop Service and Repair Manuals

Venting air from the fuel system   Note t  In order to avoid damage to the catalyst, the fuel system without return-flow line must be bled after working on the fuel lines or at the fuel filter. The vehicle can only be started after bleeding. t  Observe safety measures and rules of cleanliness when working on the fuel supply → Chapter. Special tools and workshop equipment required t  Remote control -V.A.G 1348/3 A- t  Adapter for measuring method/DSO (5-pin), e.g. -VAS 5565- t  Adapter -V.A.G 1318/20- t  Adapter -V.A.G 1318/20-1- t  Hose clamps 40 mm, e.g. -T30096 (3093)-   WARNING The fuel system is under pressure! Before opening the system lay cleaning cloths around the connection point. Reduce pressure by carefully releasing the connection point. –  Removing rear seat bench → Body Work; Rep. gr.72. –  Remove the cover from the fuel delivery unit.   Note For vehicles with auxiliary heating, the plug connection for the dosing pump -V54- must be disconnected additionally.

–  Disconnect the plug -arrow- from the fuel delivery unit. –  Check the contacts at the plug and at the fuel delivery unit for damage.

–  Connect the adapter for measuring method/DSO (5-pin) -VAS 5565- to the plug and to the fuel delivery unit. –  Connect the remote control -V.A.G 1348/3A- to the adapter -VAS 5565- and to the battery positive (+).

–  If present, remove engine cover -arrows-.

–  Remove the ventilation valve cap -arrow-.

–  Screw adapter -V.A.G 1318/20-1- onto adapter -V.A.G 1318/20-. –  Turn the valve (at T-union) anti-clockwise, until it is fully opened. –  Screw adapter -V.A.G 1318/20- firmly onto the vent valve. –  Connect hose with catch pan to adapter -V.A.G 1318/20-1-. –  Screw valve (at T-union) clockwise up to the stop into the vent valve. –  Check the adapter and hose connections for leaktightness. –  Activate remote control -V.A.G 1348/3A-. –  As soon as fuel flows out of the hose without bubbles, unscrew valve (at T-piece) anti-clockwise, until no more fuel escapes. –  Cover ventilation valve with a clean cloth. –  Throttle the bleeder hose and pull off from adapter -V.A.G 1318/20-1-. –  Unscrew adapter -V.A.G 1318/20- from vent valve. –  Screw in ventilation valve cap.

–  If present, install engine cover -arrows-.