1988 CITROEN CX fuel

USE OF THE MANUAL
PRESENTATION
The Repair Manual comes in a binder with a “Mu/to” type
mechanism to facilitate the filing of additive sheets
or the removal of a part for operation in the workshop.
The MECHANICAL COMPONENTS, PART 1 VOLUME (8531) covers operations on the MECHANlCAL
COMPONENTS and the BODYWORK which may be carried out by a general workshop.
It is divided into 15 chapters separated by vinyl tab inserts numbered @ to @
General
Engine
Fuel system-Carburettor
Ignition system
Clutch
Gearbox-Drive shafts
Source and reserve of pressure
Front axle Rear axle
Suspension - wheels - tyres
Steering
Braking system
Electrical equipment and radio
Heater, ventilation and air-conditioning
Bodywork
COMPOSITION OF A CHAPTER
Each chapter includes:
-
the list of operations in it,
-
the operations in numerical order.
OPERATIONS
The operation references are made up as follow: MA 100 - 00 II a
-
a) z T-r TiiTz
a) vehicle code letters: MA
b) three figure number identifying the assembly or the assembly part
c) figure indicating the type of operation:
-
the figures 000 indicate the vehicle specification
- the figures 00 indicate the assembly specification
- the figures 0 indicate checks and adjustments
- the figures 1 indicate removals and refittings
- the figures 2 indicate dismantling and re-assembly
-
the figures 3 indicate reconditioning
d) figure /I,... /2.../... standing for a variant,
e) letter: a, b, standing for an evolution
rious operations are presented:
1’ either through photos, drawings and texts,
hrough photos, drawings and symbols.
‘!%.OSSARY has been placed at the beginning of each volume for this purpose.
e glossary (the one in the Mechanical Components volume is different from the one in
caning for each symbol has been translated into nine languages.
kts in a removable set of “plastic” sheets bound with one manceuvrable me
ion of one or several pages (and obtain photocopies from them, for instance). the Bodywork volur nel,
‘tal r ing to facilitate the
85 31

CARBURETTOR SPECIFICATION
Engine type 829.A5
t
MAKE : WEBER
Type : 34 DMTR 461250 Ref. W 88-50
34 DMTR 46/250 W 89-50 fast idle device
Choke flap in primary barrel
Idle cut off solenoid
Dual choke carburettor of the compound type
Fuel return pipe to tank located on the carburettor top cover
DESCRIPTION 1st choke 2nd choke
Venturi
23 Ref. No. @ 26 Ref. No. @
Main jet 112 Ref. No. @ 120 (under Ref No. @)
Air compensator jet
240 Ref. No. @ 230 Ref. No. @
Emulsion tube F45 Ref. No. @ F25 (under Ref. No. @)
Idling jet 47 Ref. No. @ 50 Ref. No. @
Idling air correction jet
125 70
Accelerator pump jet 40 Ref. No. @
Enrichment device jet (petrol) 130
Enrichment device jet (air) 110 Ref. No. @
Twin fuel float weight 13 -t 0.5 g
Ball type needle valve 1.75 Ref. No. @
Positive opening of 1.35 + 0.05 mm
1st choke butterfly 0
Opening of the strangler flap
with 400 mm Mg (530 nib) 3.75 f 0.25 mm
Idle shut off solenoid Ref. No. @
Air regulating screw Ref. No. @
Mixture control screw Ref. No. @
Throttle opening device Ref. No. @
Adjustments carried out on CCL’POLLU v test bench:
OPENING OF THE THROTTLE BUTTERFLY INITIAL SETTING OF IDLING SPEED
1st choke
2nd choke 1st choke Positive opening
W mrxture screw closed W mixture screw open 2nd choke
1st choke
N 210 K 230 N 265 K 230 Y 280

CARBURETTOR SPECIFICATION
Engine type 829.A5
MAKE : SOLEX
Type : 34 CICF Ref. CIT 214 and 214-I
Choke flap in primary barrel
Dual choke carburettor of the compound type
Fuel return pipe to tank located on the carburettor top cover
DESCRIPTION
Venturi
Main jet
Air compensator jet
Emulsion tube
Idling jet
Idling air correction jet
By-pass jet
By-pass air jet
Accelerator pump injector
Econostat - Petrol jet
Air jet
Polyamide fuel float
Ball type needle valve
Positive opening of
1st choke butterfly
Opening of the strangler flap
with 400 mm Mg (530 mb)
Mixture control screw
Idle cut off solenoid 1st choke
23
127.5
205
VA
55
60 Ref. No. @
(under Ref. No. 0)
Ref. No. @
(under Ref. No. @)
Ref. No. @
Ref. No. @
Ref. No. @ 26
115
140
ZA
60
90
145
80 2nd choke
Ref. No. @ 12 I!I 2g
Ref. No. @ 1.8
1.25 k 0.05 mm
4.4 + 0.5 mm
Ref. No. @
Ref. No. @
Adjustments carried out on CCL’POLLUH test bench: Ref. No. @
(under Ref. No. 0
Ref. No. @
[under Ref No. @
Ref. No. @
Ref. No. @
Ref. No. @
Ref. No. @
OPENING OF THE THROTTLE BUTTERFLY 1 INITIAL SETTING OF IDLING SPEED
I
1st choke
W mixture screw closed 2nd choke 1st choke
W mixture screw open 2nd choke
I
Positive opening
1st choke
N 195 K 205 N 240 K 205

CARBURETTOR SPECIFICATION
Engine type J6T.A500
MAKE : WEBER
Type : 34 DMTR 11 O/100 Ref. W 14550
Choke flap in primary barrel
Idle cut off solenoid
Dual choke compound carburettor
Fuel return pipe to tank located on the carburettor top cover
Throttle closing dashpot
Anti-pollution device
DESCRIPTION - 30110185
30110185 -
1st choke 2nd choke
1st choke 2nd choke
Venturi 24
Ref. No. @ 26 Ref. No. @ 24 Ref. No. @ 26 Ref. No. @
Main jet
1 15 Ref. No. @ 97 (under Ref. No @ 1 11 5 Ref. No. @ 1 17 lunder Ref. No. @ 1
Arr compensator jet
210 Ref. No. @ 130 Ref. No. @ 240 Ref. No. @ 130 Ref. No. @
Emulsion tube
F63 Ref. No. @ F25 iunder Ref No. 0) F63 Ref. No. @ F25 [under Ref. No, 0)
Idling jet 52
Ref. No. @ 50 Ref. No. @ 50 Ref. No. @ 50 Ref. No. @
Idling air correction jet
170 70
170 70
Ball type needle valve
1.75 Ref. No. @ 1.75 Ref. No. @
Float setting
7 i 0.25 mm
7 AI 0.25 mm
Petrol enrichment jet 130 (under Ref No. @ )
130 lunder Ref. No @ 1
Air enrichment jet
1 15 [under Ref No. 0) 1 1 5 [under Ref. No. @ 1
Accelerator pump jet 50
Ref. No. @ 50 Ref. No. @
Air regulating screw
Ref. No. @ Ref. No. @
Mixture control screw Ref. No. @
Ref. No. @
Idle shut off solenoid
Ref. No. @ Ref. No. @
Throttle opening device Ref. No. @
Ref. No. @
Positive opening full choke
1.20 i 0.05 mm 1.20 -fr 0.05 mm
Opening of the strangler flap
with 400 mm Mg (530 mb) 4.25 + 0.25 mm
4.25 --lr 0.25 mm
djustments carried out on ccL’POLLU>) test bench:
Positive
1st choke
2nd choke 1st choke
opening
W mrxture screw closed
W mixture screw open Cumulation
x 110
N 200 K 245 N 255
N 310

CARBURETTOR SPECIFICATION
Engine type J6R A 500
1 MAKE : WEBER
Type 34 DMTR 120/100 Ref. w 149-50
Choke flap in primary barrel
Idle cut off solenoid
Dual choke compound carburettor
Fuel return pipe to tank located on the carburettor top cover
Throttle closing dashpot
Anti-oollution device
DESCRIPTION 1st choke 2nd choke
Venturi
Main jet
Air compensator jet
Emulsion tube
Idling jet
Idling air correction jet
Ball type needle valve
Float setting
Petrol enrichment jet
Air enrichment jet
Accelerator pump jet
Air regulating screw
Mixture control screw
Idle shut off solenoid
Throttle opening device
Positive opening full choke
Opening of the strangler flap
with 400 m Mg (530 mb)
Mechanical opening 24 Ref. No. @ 26 Ref. No. @
110 Ref. No. @ 125 Under Ref. No. @
180 Ref. No. @ 240 Ref. No. @
F45 Ref. No. @ F25 Under Ref. No. @
52 Ref. No. @ 50 Ref. No. @
155 70
1.75 Ref. No. @)
7 mm & 0.25
115 Under Ref. No. @
115 Under Ref. No. @
50 Ref. No. @
Ref. No. @
Ref. No. @
Ref. No. @
Ref. No. @
1.20 mm f 0.5
4 mm f 0.25
8 t- 0.5 mm
specifications: MA 142.0013 p.3
Refer to: checks and adjustments: MA 142.013
anti-pollution devices: MA 143.011

“LE JETRONIC” ELECTRONIC FUEL
INJECTION SYSTEM
“LE Jetronic” system
The “LE Jetronic” IS a fuel injectiorl system which injects Intermittently petrol, at low pressure, into the inlet rnanifold
The main characteristic of the device IS to rneter drrectly the air drawn in by the engine, which is the only reference
for the fuel quantity to be injected. The fuel metering IS carried out by electro-magnetically triggered injectors. These
are under a constant fuel pressure.
The quantrty of fuel injected depends on how long the Injectors remain open. The duration of opening is optimally
determined for each engine operating phase by an electronic control unit, from data supplied by various electric
sensors.
The “LE Jetronic” device is composed of:
No.
COMPONENTS MADE BY REFERENCE
142 Electronic Control Unit (E.C. U.) BOSCH 0280 000 300
192 Throttle spindle switch cc 0280 120 301
280 Supplementary air control (C 0280 140 172
302 Flow meter ,, 0280 202 021
345 Electrovalve ,) 0280 141 011
576 Injector n 0280 150 254
683 Electrical fuel pump
)> 0580 464 008
731 Relay D 0280 230 009
841 Water temperature sensor D 0280 130 026
F Fuel filter N 0450 905 002
R Fuel regulator pressure ,) 0280 160 216

“LE Jetronic” system
The “LE Jetronic” is a fuel injection system whrch injects intermittently petrol, at low pressure, into the Inlet manrfold
The main characteristic of the device is to meter directly the air drawn In by the engine, which is the only reference
for the fuel quantity to be injected. The fuel metering is carried out by electro-magnetically triggered injectors. These
are under a constant fuel pressure.
The quantity of fuel injected depends on how long the injectors remain open. The duration of opening IS optimally
determined for each engine operating phase by an electronic control unit, from data supplied by various electric
sensors.
The “LE Jetronic” device is composed of:
No. COMPONENTS MADE BY REFERENCE
142 Electronic Control Unit (E.C.U.) BOSCH 0280 000 224
192 Throttle spindle switch 0
0280 120 313
280 Supplementary air control u
0280 140 178
302 Flow meter ,)
0280 202 061
345 Electrovalve ,,
0280 141 011
575 Cold start injector n
0280 170 409
576 Injector >,
0280 150 200
683 Electrical fuel
pump 1,
0580 464 008
731 Relay >,
0280 230 009
841 Coolant temperature sensor 1)
0280 130 026
870 Slow thermal switch ,>
0280 130 214
F Fuel filter ),
0450 905 002
R Pressure regulator ,)
0280 160 216

SPECIFICATION AND PARTICULAR FEATURES
OF THE DIESEL FUEL INJECTION SYSTEM