Spark control system components (carburettor models) - removal and refitting
Spark delay and sustain valves 1 Disconnect the vacuum pipes at the valve and withdraw the valve.
2 When refitting a spark delay valve, the valve must be positioned with the black end (marked “CARB”) towards the carburettor and the coloured end (marked “DIST”) towards the distributor or electronic module (as applicable).
3 When refitting a spark sustain valve, the valve must be positioned with the end marked “VAC” towards the carburettor and the side marked “DIST” towards the distributor or electronic module (as applicable).
Ported vacuum switch
4 Where fitted, the switch(es) may be located in the inlet manifold and/or in an adapter fitted in one of the coolant hoses.
5 To remove a switch, partially drain the cooling system. Note that there is no need to remove the cylinder block drain plug.
6 Mark the vacuum pipes for location so that they can be refitted in their correct positions, then disconnect the pipes from the switch.
7 Unscrew the valve from its location.
8 Refitting is a reversal of removal, ensuring that the vacuum pipes are correctly connected. Refill the cooling system.
9 Disconnect the vacuum pipes at the fuel trap and withdraw the fuel trap.
10 When refitting, the fuel trap must be positioned with the black end (marked “CARB”) towards the carburettor, and the white side (marked “DIST”) towards the distributor, electronic module, or ported vacuum switch (as applicable) (see illustration).
22.10 Fuel trap vacuum connection markings
Spark control system additional
11 According to model, engine and equipment, additional components such as one-way valves or solenoids may also be fitted as part of the spark control system.
12 The removal and refitting procedures for these components are basically as described previously, and provided that all attachments are marked for position prior to removal, no problems should be encountered.
Contact breaker points renewal (Every 12 000 miles or 12
1 Spring back the retaining clips or undo the screws as appropriate and lift off the distributor cap. 2 Withdraw the rotor arm from the distributor shaft. 3 On the Bosch distributor disconnect th ...
Idle speed and mixture adjustment (Every 6000 miles or 6
Caution: Certain adjustment points in the fuel system are protected by “tamperproof” caps, plugs or seals. In some EEC countries (though not yet in the UK) it is an offence to drive a vehicle wit ...
Ford VV carburettor manual choke unit - removal, checking and
Note: A new gasket will be required on refitting. Removal 1 Disconnect the battery negative lead. 2 Remove the air cleaner (Section 2). 3 Slacken the choke cable clamp bolt at the choke lever, d ...