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23 Check the full throttle operation by
connecting an ohmmeter between terminals
18 and 3, then fully opening the throttle so
that dimension X is 4.0 mm (see illustration).
The internal contacts should close and the
ohmmeter reading be zero.
24 If the switch does not operate correctly it
should be renewed.
Throttle switch - LU2-Jetronic and
Motronic M1.3 systems
25 The throttle initial position must be correct
before attempting to adjust the throttle switch.
26 Slacken the throttle switch securing
screws.
27 Turn the switch unit fully clockwise, then
turn it slowly back until the idling contacts are
heard to close.
28 Tighten the securing screws.
29 Pull the wiring from the switch, then
connect an ohmmeter between terminals 2
and 18 in the switch (see illustration). The
ohmmeter should read zero.
30 Operate the throttle linkage, and the
ohmmeter should read infinity.
31 If the readings are not correct, repeat the
procedure described in paragraphs 26 to 30
inclusive.
32 Connect the ohmmeter between switch
terminals 3 and 18. The ohmmeter should
read infinity.
33 Fully open the throttle, and the ohmmeter
should read zero.
34 If the specified readings cannot be
obtained, renew the switch.
35 Reconnect the switch wiring plug on
completion.
11 Fuel injection system
components - removal and
refitting
3
Note: Although some of the components may
differ slightly in detail, the following
procedures are applicable to all three multi-
point fuel injection systems. It is advisable to
check the availability of individual components
with your Peugeot dealer before dismantling.
Fuel injectors
Note: Refer to the warning note in Section 1
before proceeding. Ensure that the working
area is clean before removing the injectors,
and ensure that no dirt is allowed to enter the
system during the procedure. No attempt
should be made to overhaul the injectors. If a
fault or contamination is suspected, seek
specialist advice.
1 Disconnect the battery negative lead.
2 Disconnect the wiring plugs from the fuel
injectors, labelling them if necessary to ensure
correct refitting.
3 Disconnect the vacuum hose from the top
of the fuel pressure regulator.
4 Unscrew the four bolts securing the fuel rail
to the inlet manifold (two upper bolts, and two
bolts at the right-hand end of the rail), then
carefully lift the rail, complete with pressure
regulator and fuel injectors, from the inlet
manifold, taking care not to strain any of the
hoses or pipes.
5 To remove a fuel injector from the fuel rail,
carefully remove the metal securing clip, then
pull the injector from the rail. Be prepared for
fuel spillage, and take adequate precautions.
6 Refitting is a reversal of removal, but fit new
injector O-rings.
Fuel pressure regulator
Note: Refer to the warning note in Section 1
before proceeding. Ensure that the working
area is clean and that no dirt is allowed to
enter the system during the procedure.
7 For improved access to the lower pressure
regulator securing nut, proceed as described
in paragraphs 3 and 4.
8 If not already done, disconnect the vacuum
hose from the top of the pressure regulator.
9 Slacken the hose clip, and disconnect the
fuel return hose from the bottom of the
pressure regulator. Be prepared for fuel
spillage, and take adequate precautions.
10 Unscrew the two bolts securing the
pressure regulator to the fuel rail bracket
assembly, whilst counter holding the nuts.
Note that on some models, a hose bracket is
secured by the upper bolt.
11 Pull the regulator from the end of the fuel
rail, and recover the O-ring.
12 Refitting is a reversal of removal, but use a
new O-ring when refitting the pressure
regulator to the fuel rail, and where applicable,
use new injector O-rings.
Throttle position switch
13 Disconnect the battery negative lead.
14 Release the securing clip and disconnect
the wiring plug from the switch.
15 Remove the two securing screws, then
withdraw the switch from the throttle body.
16 Refitting is a reversal of removal, but on
completion, adjust the switch as described in
Section 10.
Throttle housing
17 Disconnect the battery negative lead.
18 Release the securing clip, and disconnect
the wiring plug from the throttle position
switch.
19 Loosen the securing clamp, and
disconnect the air trunking from the front of
the throttle housing.
20 Disconnect the throttle cable, with
reference to Section 3.
21 Disconnect the vacuum and/or breather
hoses from the throttle housing, noting their
locations to ensure correct refitting.
22 Unscrew the three throttle housing
securing nuts, and recover the washers.
Remove the throttle cable bracket from the
top throttle housing securing stud, noting its
orientation.
23 Withdraw the throttle housing from the
inlet manifold.
24 Refitting is a reversal of removal, bearing
in mind the following points.
a) Ensure that the vacuum and/or breather
hoses are correctly reconnected, as noted
before removal.
b) After refitting the throttle housing, check
the adjustment of the throttle cable, as
described in Section 3.
c) On completion, if any work has been
carried out on the housing, check the
adjustment of the throttle switch, as
described in Section 10.
Supplementary air (cold start)
device
25 Remove the battery as described in
Chapter 5A.
26 Disconnect the air hoses then unbolt the
airflow sensor and bracket. Disconnect the
wiring.
27 Unscrew the supplementary air device
bracket nuts and disconnect the wiring.
28 Tilt the assembly and coolant outlet
housing (without disconnecting the coolant
hoses) and remove the concealed mounting
bolt.
29 Disconnect the air hoses, then remove the
remaining mounting bolt and withdraw the
unit.
30 Refitting is a reversal of removal.
4C•4 Fuel system - multi-point fuel injection engines
10.23 Full throttle dimension “X”
4 Throttle lever
7 Throttle housing
X = 4.0 mm
10.29 Throttle switch terminal
identification - LU2-Jetronic and Motronic
M1.3 systems