CITROEN CX Series - Page 149

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ANNEXE
: D ADJUSTING THE IDLING
SPEED
AND
THE EXHAUST EMISSION
CHECKING CON
DITIONS
1.
Checking the
idling
speed must be carried
out
on a dean
engine
on which
the
ignition
and the
valve
cleararices are
properly
adjusted. and
fitted with
a dean air-filter.
2.
Check that
the
throttle
butterfly returns correctly
to its
stop.
3. Do not
bad the alternator by switching on
any
of
the electrical components,
except
the
iqnition
and the electric cooling
fan (s)
4. Run the engine to bring
the ou temperoture
up
to 70 to
80e
C
(
wait for
the eiectric
cooling
fan
s)
to cut in
).
IMPORTANT
: Use exclusively
a
high tension
tachometer
(
do
not damaqe the
HT. lead of
the ignition wiring
hamess
).
ADJUSTMENT
1.
Check that the
butterfly is not
jammed in position
when it is
restinq against its
stop.
2.
Wait for
the electric cooling
fan (s) to cut in.
3. Use
screw (1) to adjost
the idlinq
speed to
850
to
900 rpm.
4. Check the
exhaust emission
The
resulting
amount of
CO
-
C02
corrected CO
reading
)
must be below
4.5
.
In
anse
this reading
cannot
be
obtained,
check
the
valve
clearances, the ignition,
the
fuel pressure,
the air-tiqhtness of
the
aircircuitr
and
the
cornplete
fuel
injection
system.
5.
On
a vehicie fitted
with optional
air-conditioninq
switch
the compressor
on,
and adjust
the
idling
speed from
1000 to
1050
rpm,
by
udjusting
the
screw on
the auxiliary box
bocated
next to
the
electro-valve.
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