Fuel injection system of the B6 engine: 1 - air filter element; 2 - air filter housing; 3 - air filter cover; 4 - throttle body; 5 - upper part of the intake manifold; 6 - intake manifold; 7 - injection nozzle; 8 - distribution main; 9 - fuel pressure regulator; 10 - fuel supply line; 11 - fuel filter; 12 - drain pipe; 13 - fuel supply hose to the fuel filter; 14 - throttle position sensor; 15 - forced idle pneumatic valve; 16 - fuel quantity meter; 17 - housing, additional air supply valve; 18 - fuel pump; 19 - fuel level sensor; 20 - fuel tank; 21 - idle mixture quantity adjusting screw.