Throttle damper operation check (6000 Mile (10 000 Km) / 6 Month Service)
1 To check the operation of the throttle damper fitted to models equipped with a Ford VV carburettor, proceed as follows:
2 Warm up the engine to normal operating temperature, then switch off. Connect a tachometer in accordance with the manufacturer’s instructions. To keep the fan running during the adjustment procedure, disconnect the wiring multi-plug from the thermal switch (located in the thermostat housing) and bridge the two contacts in the plug with a short length of wire.
3 Start the engine and increase its speed to 3200 ± 150 rpm by means of the idle speed adjustment screw. When the speed has stabilised, switch off the engine.
4 Rotate the secondary throttle lever clockwise to remove any play between the primary and secondary throttle levers, but ensure that the primary lever does not move.
5 Using a feeler blade, unscrew the damper until a clearance of 0.1 to 0.3 mm exists between the damper plunger and the secondary throttle lever.
Setting throttle damper clearance using a feeler blade (arrowed) - Ford VV
carburettor
Hold the damper in this position and tighten the locknut.
6 Start the engine and return the idle speed to the specified rpm. Disconnect the tachometer and bridging wire, refit the multi-plug, then refit the air cleaner.