2012 911 Section 2-2 11/3/11 10:14 AM Page 23
911 Carrera 911 Carrera S
2.6 Fuel system Fuel supply, low-pressure side The engine is designed to provide optimum performance and fuel consumption if premium unleaded fuel 93 octane (
R+M 2
DME engine electronics
) is used. The engine is suitable for operation
with fuel containing up to 10% ethanol. The use of fuels containing ethanol can
2
result in increased fuel consumption. If unleaded fuel with 90 octane ( R+M 2 ) or less is used, the engine’s knock control automatically adapts the ignition timing. The use of unleaded fuel with octane numbers of less than 90 octane ( R+M 2 ) could
at full throttle. Fig. 2_412_11 C2 fuel tank, 16.9 gal. (64 liters), 2.6 gal. (10-liter) reserve Carbon canister (not for USA) Installation position of the control unit for the electric fuel pump flow control under the battery retaining bracket.
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reduce engine power and increase fuel consumption. The vehicle must not be driven
2_412_11
Special tool 9731 1 The special tool 9731 1 (Fig. 2_413_11) is used for opening the fuel tank cap on the top of the fuel tank (Fig. 2_414_11, 1).
Control unit for electric fuel pump
9731 1
The control unit for electric fuel pump flow control (Fig. 2_416_11, 2) is installed under the battery tray (3). Depending on the amount of fuel required, the current consumption on Carrera 2 vehicles, and thus the delivery rate of the electric fuel pump, is controlled at a level between 6 and 15 amps. The current consumption
2_413_11
can be measured at the fuse of the electric fuel pump.
2_416_11
2_414_11
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