Peugeot 405 Manual

General information and precautions
Fuel/exhaust systems - single-point fuel injection models / General information and precautions


The fuel system consists of a fuel tank (which is mounted under the rear of the car, with an electric fuel pump immersed in it), a fuel filter, fuel feed and return lines, and the throttle body assembly (which incorporates the single fuel injector and the fuel pressure regulator). In addition, there is an Electronic Control Unit (ECU) and various sensors, electrical components and related wiring. The air cleaner contains a disposable paper filter element, and incorporates a flap valve air temperature control system. This allows cold air from the outside of the car and warm air from around the exhaust manifold to enter the air cleaner in the correct proportions.

Refer to Section 7 for further information on the operation of each fuel injection system, and to Section 18 for information on the exhaust system.

Throughout Part B, it is occasionally necessary to identify vehicles by their engine codes rather than by engine capacity. Refer to the relevant Part of Chapter 2 for further information on engine code identification.

Warning: Many of the
procedures in this Chapter require the removal of fuel lines and connections, which may result in some fuel spillage. Before carrying out any operation on the fuel system, refer to the precautions given in УSafety first!Ф at the beginning of this manual, and follow them implicitly. Petrol is a highly dangerous and volatile liquid, and the precautions necessary when handling it cannot be overstressed.

Note: Residual pressure will remain in the fuel lines long after the vehicle was last used.

When disconnecting any fuel line, first depressurise the fuel system as described in Section 8.


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