Chapter 1 Routine maintenance and servicing

1595Ford Fiesta Remake4D•8 Fuel system - sequential electronic fuel injection enginesUnplug the electrical connectors at thecamshaft position sensor and the coolanttemperature sensor, then unclip the wiringfrom the ignition coil bracket, and secure it tothe manifold.17 Remove the three screws securing thewiring “rail” to the rear of the manifold.Releasing its wire clip, unplug the largeelectrical connector (next to the fuel pressureregulator) to disconnect the wiring of themanifold components from the engine wiringloom.18 Marking or labelling them as they areunplugged, disconnect the vacuum hoses atthe manifold and throttle housing.19 Undo the fuel feed and return linesconnecting the engine to the chassis. Plug orcap all open fittings.20 Unbolt the earth lead from the cylinderhead rear support plate/engine lifting eye,then unscrew the bolt securing the supportplate/lifting eye.21 Unscrew the nuts and bolts securing themanifold to the cylinder head, and withdraw it.Take care not to damage vulnerablecomponents as the manifold assembly ismanoeuvred out of the engine compartment.22 With the manifold removed, clean alltraces of the old gasket from the matingsurfaces of the manifold and the cylinder head.RefittingAll engines23 Refitting is the reverse of the removalprocedure, noting the following points:a) Fit a new gasket, then locate the manifoldon the head and install the nuts and bolts.b) Tighten the nuts/bolts in three or fourequal steps to the specified torque,working from the centre outwards, toavoid warping the manifold.c) Refit the remaining parts in the reverseorder of removal - tighten all fasteners tothe torque wrench settings specified(where given).d) Where drained, refill the cooling systemas described in Chapter 1.e) Before starting the engine, check theaccelerator cable for correct adjustmentand the throttle linkage for smoothoperation (Section 5).f) When the engine is fully warmed-up,check for signs of fuel, inlet and/orvacuum leaks.