Fuel system (1.6 and 1.8 litre (R6A type) CVH) - depressurisation

Remember to depressurise the fuel system before loosening any connections.

Refer to the precautions in Section 1 before proceeding. The fuel system will remain pressurised after the engine is switched off.

1 Disconnect the battery negative lead.

2 Remove the air cleaner assembly.

3 Position a suitable container (or a sufficient quantity of absorbent cloth) beneath the fuel inlet connection on the CFI unit.

4 Use an open-ended spanner on the flats of the inlet union screwed into the CFI unit, to prevent it from turning while the inlet pipe union is loosened (see illustration). Allow all pressure/fuel seepage to dissipate before fully unscrewing the union if it is to be disconnected, or tightened if another part of the system is to be worked on.

4.4 CFI unit fuel inlet union (arrowed)
4.4 CFI unit fuel inlet union (arrowed)

5 The system will remain depressurised until the fuel pump is primed prior to starting the engine. Remove the container or cloth, as applicable, on completion.

Fuel filter - renewal

Refer to Chapter 1, Section 41.

    See also:

    Fuel pump - removal and refitting
    Removal 1 The fuel pump is integral with the fuel level sender unit in the fuel tank (see illustration). 7.1 Integral fuel level sender unit/fuel pump - 1.4 CFI engine A Fuel pump B Sender unit ...

    Starter motor - testing in the vehicle
    1 If the starter motor fails to operate first check the condition of the battery. 2 Check the security and condition of all relevant wiring. Solenoid check 3 Disconnect the battery negative lead ...

    General information
    1.6 litre engine The 1.6 litre CVH engine was introduced in September 1991, to replace the 1.6 litre SOHC engine used previously in the Sierra range. The engine is broadly similar to the 1.8 litr ...