Idle Speed Control Valve (ISCV) - removal, cleaning and refitting

Removal
1 Disconnect the battery negative lead.

2 Disconnect the valve wiring plug (see illustration).

12.2 Idle speed control valve - 1.6 EFI engine
12.2 Idle speed control valve - 1.6 EFI engine

A Wiring plug B Securing bolts

3 Unscrew the two securing bolts, and withdraw the valve from the air cleaner housing.

Cleaning
4 Remove the valve as described earlier in this Section.

5 Immerse the valve in a container of clean petrol and allow it to soak for approximately three minutes.

6 Use a clean paint brush to clean the bore, slots and piston of the valve.

7 Using a small screwdriver, carefully move the piston up and down in the bore (do not use the slots to do this), then rinse the valve with petrol and dry it, preferably using compressed air (see illustration).

12.7 Using a screwdriver to move the idle speed control valve piston - 1.6
12.7 Using a screwdriver to move the idle speed control valve piston - 1.6 EFI engine

8 Refit the valve as described in the following paragraphs.

Refitting
9 Refitting is a reversal of removal, ensuring that the mating faces of the valve and air cleaner are clean.

10 On completion, start the engine and check that the idle speed is stable, and that there are no air leaks. Warm the engine up to normal operating temperature, then switch on all available electrical loads and check that the idle speed is maintained.

    See also:

    Power steering gear - removal and refitting
    Note: New power steering fluid hose O-rings will be required when refitting. Removal 1 The procedure is as described for manual steering gear with the following differences (see illustration). ...

    Auxiliary drivebelt check (Every 12 000 miles (20 000 km) or 12 months)
    1 Refer to the Specifications at the beginning of this Chapter and check the tension of each drivebelt at the point stated. Check the full length of each drivebelt for cracks and deterioration. It ...

    Engine oil cooler - removal and refitting
    Note: Suitable sealant will be required on refitting - see text. Removal 1 Remove the engine oil filter (Chapter 1). 2 Note the angle at which the coolant hoses are set, then disconnect the hoses ...