Rover 214 & 414 Service and Repair Manual - Rover club

4B•8 Fuel and exhaust systems - single-point fuel injection engines
15.13a Undo stepper motor retaining
screws (arrowed) . . .
illustrations). Do not attempt to dismantle the
assembly.
Refitting
14 Refitting is the reverse of the removal
procedure. Ensure that the throttle housing
and motor mating surfaces are clean and on
completion, adjust the throttle cable to ensure
that the stepper motor is correctly indexed.
Throttle potentiometer
Removal
15 Although not strictly necessary, access is
greatly improved if the air cleaner assembly is
first removed.
15.19 Ensure potentiometer tongue
engages correctly with throttle lever
(spacer arrowed)
15.20 Disconnect wiring connector . . .
15.13b . . . and remove stepper motor
assembly
16 Disconnect the battery negative lead.
17 Release the wire retaining clip and
disconnect the potentiometer wiring
connector (see illustration).
18 Remove the two screws and remove the
potentiometer from the throttle housing,
noting how its tongue engages with the
throttle disc spindle lever. Withdraw the
spacer if required.
Refitting
19 Refitting is the reverse of the removal
procedure,
illustration):
noting the following (see
a) Carefully clean the mating surfaces of the
throttle body, the spacer and the
potentiometer, then refit the spacer.
b) Refit the potentiometer so that its tongue
engages FORWARD of (ie: inside) the
throttle disc spindle lever, then rotate the
throttle cam to check the action of the
lever and tongue.
c) Securely tighten the potentiometer
screws then recheck the potentiometer
operation before reconnecting the wiring
connector.
Engine management
(ignition/fuel injection) ECU
Removal
20 Disconnect the battery negative terminal
and unplug the wiring connector(s) from the
ECU (see illustration).
15.21a . . . and absolute pressure sensor
vacuum hose from ECU . . .
1689 Rover 214 & 414 Updated Version 09/97
15.17 Disconnecting throttle
potentiometer wiring connector (mounting
screws arrowed)
21 Disconnect the absolute pressure sensor
vacuum hose from the unit, then undo the
three retaining nuts and remove the ECU from
the engine compartment (see illustrations).
Refitting
22 Refitting is a reverse of the removal
sequence. Tighten the ECU retaining nuts to
the specified torque. Due to the nature of the
ECU, if a new or different ECU has been fitted,
it may take a short while for full idle control to
be restored.
Manifold absolute pressure
sensor
23 This is part of the ECU and is removed
and refitted as described above.
24 The sensor’s vacuum hose runs from the
inlet manifold to the ECU via a fuel (vapour)
trap mounted in the air cleaner assembly.
25 To remove the fuel trap, remove the air
cleaner assembly cover, release the clips and
disconnect the hoses, then remove the single
retaining screw and withdraw the trap.
26 On refitting, note that the hoses are
colour-coded (green to the ECU, white to the
inlet manifold) to ensure correct reconnection
(see illustration).
Intake air temperature sensor
Removal
27 Disconnect the battery negative lead.
15.21b . . . then undo ECU mounting nuts
(arrowed) and remove unit