1983 Citroen CX engine

Downloaded from www.Manualslib.com manuals search engine OPERATION No MA.IE. 144-0 : (,hcrkir~g m/cl nrl;tts/ir/<~ I/W a I.-J~~/m,i~ ~~otectrot,ic Op. MA.IE. 144-O 25 fi~cl irijection systc~rti.
ANNEXE : A - CHECKING THE IGNITION
THE ENGINE TURNS, BUT DOES
NOT FIRE

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Downloaded from www.Manualslib.com manuals search engine ANNEXE : B - CHECKING THE AIR CIRCUIT
L __- -’

Downloaded from www.Manualslib.com manuals search engine ANNEXE : C CHECKING THE FUEL CIRCUIT AND PRESSURE
- Remove the cold-start injector ( 1) and carefully
remove its petrol feed pipe.
- Connect pressure gauge ( 2) onto the cold-start
injector petrol line.
- Fit the cold-start injector zmto the manifold.
- Run the engine at idling speed the petrol pressure
must be regulated to 2 bars ( 29 psi ).
- Disconnect the vticuum pipe ( 3 i from the pressure
regulator the regulated pressure must be 2.5 bars
i 36 l/4 psi ).
If one of the readings is incorrect, check condition
of the flexible vacuum pipe for the pressure
regulator. as well as its aspect. If it is satisfactory
replace the pressure requlotor after making sure
that its VCICUU~ pipe is not blocked totally or
partially at the manifold end.
With the engine stopped, the pressure must
remain stable at 2 bars ( 23 psi ); if not, check
for a leak which could be found at the cold-start
injector, one of the main injectors. or at the level
of the pressure regulator valve diaphragm.

Downloaded from www.Manualslib.com manuals search engine 28 OPERATION N” MA.IE. 144-O : Ch <,c ,ng n,,d nlfjusfiup Ihe u I.-~<~tro,,ir i) <~lrr/mr,ir k’
/,,,.I i,,jrr/io,, S~S,W1, ANNEXE : D - ADJUSTING THE IDLING SPEED AND THE EXHAUST EMISSION
CHECKING CONDITIONS
1.
Checking the idling speed must be carried out
on a clean engine on which the ignition and the
valve clearances are properly adjusted and
fitted with a clean air-filter.
2. Check that the throttle butterfly returns correctly
to its stop.
3. Do not load the alternator by switching an any
of the electrical components, except the iqnition
and the electric cooling fan (s) 4.
Run the engine to bring the oil temperature up
to 70 +o 80’ C ( wait for the electric cooling
fan is) to cut in ). IMPORTANT : Use exclusively (I high tension
tachometer ( do not damage the H.T. lead of
the ignition wiring harness ).
ADJUSTMENT
1. Check that the butterfly is not jammed in position
when it is resting against its stop.
2. Wait for the electric cooling fan (s) to cut in.
3. Use screw ( 1 ) to adjust the idling speed to 850
to 900 rpm.
4. Check the exhaust emission :
The resulting amount of CO - CO2 ( corrected CO
reading 1 must be beI& 4.5 %.
In case this reading cannot be obtained, check the
valve clearances, the ignition, the fuel pressure,
the air-tightness of the aircircuit, and the complete
fuel injection system.
5. On (I vehicle fitted with optional oirtonditioning
switch the compressor on, and adjust the idling
speed from 1000 to 1050
rpm, by adjusting the
screw on the auxiliary box located next to the
electro-vol”e.

Downloaded from www.Manualslib.com manuals search engine OPERATION No MA. 173-O : Chrrkivp fhr prmd s,,pp/> Op. MA. 173.0 1
PETROL PUMP
AC DELCO pump reference E/PE 4.777
Auto-regulating diaphragm lift and force pump
operated by eccentric on camshaft.
This pump is fitted with (I device which enables it
to function on re-cycled petrol. This re-cycling is
effected by means of a by-pass .( 1 ) fitted on the
carburettor cover.
Excess petrol supplied by the pump returns to the
tank across an orifice calibrated from 0.8 to 0.9mm
in the by-pass union (1).
PETROL PUMP OUTPUT
(I) Otitput nil, maximum pressure : 325 mbars (4 7 psi).
b) Output through open carburettor float needle
valve.
500 45 88
3000 65 170
5500 69.5 192
I I
Minimum pressure
in mbors
INSTALLATION OF PETROL PUMP
Fitted on the crankcase with :
one (( Phenoploste P12 )) spacer 5 + 0.1 mm thick.
two (< SOCOID a> paper gaskets fitted dry.
Tightening torque for petrol pump nuts :
21 mN ( 2.1 m.kg ).( 15 l/4 ft.lb )
CHECKING THE STROKE OF THE PUMP PUSH-ROD
a) With the pump removed and using (I depth gouge A,
take the measurement between the upper face of
the spacer ( with paper joints ) and the camshaft
eccentric in its high position and in its low
position.
This measurement should be :
- Upper position of eccentric 27.4 ? 0.35 mm
- Lower position of eccentric 32.4 rk 0.35 mm
b) Measure the length u a a) between the spring stop cup
and the tip of the pump control push-rod.
This length should be :
a = 4.5 mm minimum

Downloaded from www.Manualslib.com manuals search engine 2 OPERATION No MA. 173.0 : C/ l<,C ,,,g //JP p/r”/ SuppI) k’
CHECKING THE PETROL PRESSURE USING APPARATUS 4005-T
Install apparatus 4005-T as shown above.
Disconnect reservoir return line from the carburettor and fit plug A on by-pass union ( 1 1.
Unscrew knurled knob B by approximately one and a half turns.
Start the engine
a) Check pressure of petrol at nil output :
b
c -Fully screw down knurled knob B and read the stabilized pressure on the pressure gouge which should
be 325
mbors ( 47 psi ) maximum.
Check the proper sealing of the pump return valve
-Stop the engine. There should be no sudden drop in pressure
Check the proper sealing of the carburettor needle valve :
- Unscrew knurled plug B and start the engine. Let it run for a few minutes.
-Stop theengine.
There should be no sudden drop in pressure.
= Remove apportus 4005=T and fit to carburettor the tank supply and return pipes (after having removed plug A 1:
CHECKING THE PUMP FOR LEAKS
- Close the pump return pipe.
-- Blow compressed air under pressure of 800 mbar
( 11.6 psi ) into Suction tube.
Immerse pump in a container filled with clean
petrol.
There should be no sign of dny leak.
Work on petrol gauge sender unit :
To work on the petrol gouge sender unit it is
necessary to drain the tank (drain plug 1, and
~emcwe it. It is held by double strap fixed by
nut (2 1.
Tightening of nut (2) = 15 mN ( 1.; m.kg )
( 10 3/4 ft.lb ).

Downloaded from www.Manualslib.com manuals search engine IGNITION
OPERATION N’ MA. 210-00 : (:horr/r/c,ri.s/ics nrtrl spccinl /C,O/UTCJS of /he igtti/ioe Op. MA. 210-00 1 M 20/616
M 22/617 M 23/623 ENGINES
I CHARACTERISTICS
ENGINES
........ ........... ................................................. M 20/616 - M 22/617 M 23/623
DISTRIBUTORS ........................................... MAGNETI-MARELLI _._ ..............
DUCELLIER DUCELLIER
Reference N” ........................... .., ............................. _._ S 167 A 4510 B 525 068 A
Rotation direction ( seen from drive side ) ....................... 4 Anti-clockwise -
Contact pads pressure ( for information purposes ) ..............
w 440 A
50 g -
Distance between contact pads
* ................................... 0 40 mm C
Closing angle of cam ................... .................................. 55" It
2 3G
DWELL ratio ............................................... 4
....... .......... 61 -7 23 i’-
Angular gap between the four opening points ( symmetry
of the cams ) ....................................................... - 1” max 4
Capacity of condenser ......... ... ............... ...... ........ 4 0.33 i 0 03 /IF-
Minimum resistance of condenser ...............................
., ...
4 5MQ -
Centrifugal advance, ref. n’- of curve ................................. -LA2 - LA 4
Vacuum advance correction, curve advance ..................
LD 2 Static advance
: lo’- engine flywheel Strobe setting
: 10’ % 1’. at idling speed 850 to 900 rpm for manual gearbox
700 to 750 rpm for converter gearbox