2004 DACIA SUPERNOVA Repair Manual

ENGINE E7J-A-2/6012
FUEL MIXTURE
The following are taken apart:
- air-filter;
- accelera tion cable;
- injection ramp ( see Chapter Injec-
tion ramp );
The electric connectors are uncoupled: - atmospheri c pressure sensor;
- air tempera ture sensor;
- step-by-step engine;
- clapper potentiometer.
The fuel supply conduits are taken apart (bot h going- and return);
The clapper c ommand lever is uncoupled and the body of the clapper is taken off;
The screws and screw-nuts fixing the intake collector a re taken apart .
RE-MOUNT ING
The fittings of the intake collector are re placed;
The same steps are taken as in the case of the dismantling, only in the reverse order.
Tighten the inlet manifol d screws and nuts at the require d moment of 2.5 daNm. T
IG H TENING CO UPL E (daNm)
Screws and screw-nuts for intake collector 2.5 INTA
KE COLLECTOR
12 - 5
DISMOUNTING
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ENGINE E7J-A-2/6012
FUEL MIXTURE
TIGH TENING CO UPL E (daNm)
Screws for collector fi xing 2.5
DIS M O UNT ING
The thermic screen is taken apart;
The connection between the exhaust collector and the exhaust pipe is taken off;
The exhaust collector is taken apart
Re-mou nting
The same steps are taken as in the case of the dismantling, only in the reverse order.
The screws are tightened at the couple. EXHAUST COLLECTOR
12 - 6
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E7J-A-2/60 ENGINE13
PUMP SUPPLY
AIM:
To avoid accidental fire s owing to fuel leaks, which can be caused by an accident.
F
UNCT IO NING:
The shock-sensor lies in the engine compartment: it is mounted on the left-side shock-
absorber column. Du ring a shock, the ball of the sensor goes out of its slot, a nd thus achieves the breaking
of the electri c c ircuit be tween the relay commanding the petrol-pump and t he pe trol-pum p
itself.
PLACING B ACK THE SH OCK-SENSOR IN OPERAT IONAL MO DE
In order to resume the functioning of t he shock-sensor it will suffice to press its top,
and thus replace the ball in its former position. BREAKING FUEL SUPPLY
13 - 1
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E7J-A-2/60 ENGINE13
PUMP SUPPLY
CAU T ION!
When th e fuel circuit is opened, any
pe trol jet due to residue pressure must
be averted by mea ns of a gauze.
DIS M O UNT ING
The battery is disconnected.
The air-filter is taken out.
To disconnect:
-no. 1 fuel supply tube;
-no. 3 return fuel tube;
-no. 4 pressure-regulator tube.
Injection ramp Screws no. 2 are taken off.
The ramp is taken apart .
In orde r to t a ke a p ar t a n i n j ect o r,
w ithdraw c lamp no. 5 and then pull t he
injector.
RE-MO UNT ING
Replace t he t orric fittings at the base of
the i njectors (if t he i njector has been taken
apart as well a s the fitting at the end of t he
injector). For the supply junctions and the return
petrol tubes to be c orrectly coupled a click
must be heard the moment the coupling is
done.
The rest of the ope rations are done in
the reverse order a s that of the taking a part.
INJECTION RAMP
13 - 2
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E7J-A-2/60 ENGINE13
PUMP SUPPLY
LOCAT IO N
The petrol filter i s mounted under the car, in front of the petrol tank.
PETROL FILTER
13 - 3
REPLACE MENT
The replacement of the petrol filter i s recommended for a ny ove rhauling or for max.
20,000 kilometers.
CAUTION!
When the fuel circuit is opened, any petrol jet due to residue pressure
mu st be averted by means of a gauze.
DIS M O UNT ING
Before every taking-a part operation, prevent fuel from leaking.
Clamps no. 1 are pushed and the speedy junctions are disconnected.
Screw no. 3 is taken off and the petrol filter i s taken apart.
R
E-MOUNT ING
Ob serve the flowing direction of the fuel (which is shown by an arrow inscribed on
the filter).
Connect the speedy junctions back, by hand-pushing.
A correct coupling of the speedy junctions is ensured when there is a click at the
moment of the coupling.
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E7J-A-2/60 ENGINE13
PUMP SUPPLY
SPE CIAL DE VICE S
Tu ning pincers “CLIC”
It is recommendable to do the inspection
of the fuel pump-fl ow through t he re turn fue l
hose which is connected on the pump-level
transmitter set.
I
MPORTANT!
During these operations it is compul-
sory:
-not to smoke or handle incandes-
cent obje cts at the working place;
-to ensure protection from the petrol
projections due to residue pressure left in
the ch anneling during the taking-apart.
PUMP-FLOW INSPECTION
The re turn c hanneling no. 1 of the fuel
supply is disconnected.
A hose is connec ted on the junct ion
whose end i s introduced in a gra ded ve ssel
(from 0 to 2000 ml) Term inals 3 and 5 of H relay (lying in
the fuse-box of t he motor-compart ment) of
the petrol pump are shunted. Within a minute, the fl ow of t he pump
must be min. 1.3 lite r at the voltage of 12
V .
If the fl ow is not corre ct, the suppl y
voltage of the pump is inspected (t he flow
d ecreases by approx. 10% for a 1 V
voltage-decre ase).
13 - 4
1
PUMP FLOW
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E7J-A-2/60 ENGINE13
PUMP SUPPLY
SU PPLY PRESSURE CONTROL
SPECIAL DE V I C E S
MOT 1311-01 Control Kit for
petrol pressure
MOT 1311-04 J Junction
MOT 1311-06 Junction-disconnect
ing device
CAUTION!
When the fuel circuit is opened, any
petrol jet due to residue pressure must be
averted by means of a gauze.
The air-filter is taken apart .
The fuel supply hose is disconnected.
The MOT 1311-04 deri vation junction
is connected onto the ramp, then the fue l-
s upply channelling is re-connected onto the
junction.
Te rm inals no. 3 and 5 of the H fuel-pump
relay (l ocated in the engine fuse -box) a re
shunted.
Pressure must be 3+/-0.2 bar.
By applying a 500 mbar depression on
the pressure-regulator, the pre ssure of the
fuel must be 2.5+/-0.2 bar.
13 - 5
MOT. 1 311 -0 4 MOT. 1 311 -0 1
The manometer 0-10 bar, as well a s the
flexible hose MOT 1311-01 are mounted.
SU PPLY PRESSURE
MOT. 1 311 -0 6
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14E7J-A-2/60 ENGINE ANTI-POLLUTION
1. INTAKE CO L LE CTO R
2.CARB O N CANIST E R
3.DRAINING VALVE
4.CL APPE R BODY
R.CH ANNE L ING FRO M THE T
ANK
PETROL VAPOURS-ASPIRATION
FUNCTIONING SCHEMA
14 - 1
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