Peugeot 405 Manual

General information and precautions
Fuel/exhaust systems - carburettor models / General information and precautions

The fuel system consists of a fuel tank mounted under the rear of the car, a mechanical fuel pump, and a carburettor. The fuel pump is operated by an eccentric on the camshaft, and is mounted on the rear of the cylinder head. 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 the exhaust manifold, to enter the air cleaner in the correct proportions.

The fuel pump lifts fuel from the fuel tank to the carburettor via a filter located in the rear of the engine compartment, and supplies it to the carburettor via an anti-percolation chamber.

The anti-percolation chamber ensures that the supply of fuel to the carburettor is kept at a constant pressure, and is free of air bubbles.

Excess fuel is returned from the antipercolation chamber to the fuel tank.

The carburettor is either a Solex 34-34 Z1 or Solex 32-34 Z2 twin-choke carburettor, or Weber 36TLP single-choke carburettor (see Section 11), mixture enrichment for cold starting is by automatic choke on the Solex carburettor and a cable-operated choke control on the Weber carburettor. On the Solex carburettor a vacuum-operated choke unloader, accelerator pump and full load enrichener device are fitted to govern the fuel requirements of the engine over its full operating range.

The exhaust system consists of three or four sections according to model. The front pipe is in one or two sections; where it is in two sections the rear section may be plain or include a catalytic converter, where it is in one section it may include a catalytic converter. All models are fitted with an Intermediate pipe and silencer, and a tailpipe and silencer. The system is suspended throughout its entire length by rubber mountings.

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.

© 2019 All Rights Reserved.