2004 DACIA SUPERNOVA fuel pump

E7J-A-2/60 ENGINE17
IGNITION AND INJECTION
17 - 47
DIAG
NOSING-INTERPRETING THE DEFECTS
POLLUTING COMBUSTION MISFIRE
DESTRUCTIVE COMBUSTION MISFIRE
1. Combustion misfire during the last running done
2. Confirmed combustion misfire.DEFECT
PR ESENT
Combustion misfire at cylinder 1
Combustion misfire at cylinder 2
Combustion misfire at cylinder 3
Combustion misfire at cylinder 4.
Furnishe s informa tion c onc e rning the na ture and loc ation of bre a kdown.
SUGGESTIONS
31.
Connect the tester and select “Test of ignition”.
Watch the indications and replace the necessary parts.
Connect the tester and select “Test of compression”.
Watch the indications and replace the necessary parts.
Connect the tester and check the cogs of the flywheel.
Remedy if necessary.
If no defect is found ou
t, then there is a problem with the fuel-supply circuit. You must
check:
-p etro l filter
-f low and pressure of fuel
-condition of petrol pump
- if there are impurities inside the tank
-condition of injectors.
Remedy the elements of the fuel-supply circuit that are faulty.
Note down other functional defects.
Erase the defec ts memorized by the calculator.
Remedy other possible defects.
AFTER REPAIR
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E7J-A-2/60 ENGINE17
IGNITION AND INJECTION
17 - 66
DIAG
NOSING-BREAKDOWN LOCALIZATION ALGORITHM
STARTING PROBLEMS
1.
Do not use this information before having done the complete check-up
with the tester!
SUGGESTIONS
♦♦
♦♦
Check if there is petrol in the fuel tank (do not rely on the
on-board in
dices). Check if it is the fuel recommended by
the manufacturer.
Disconnect the tube between the draining valve and the
intake collector and strangle it up. If the disturbances disap-
pear, the cause was the draining valve.
Connect the “CLIP TEHNIC” device to do this test in ac-
cordance with the usual manner of work.
Connect the tester “CLIP” and do the test corresponding to
the check-up of the rotation signal.
Gently touch the step-by-step engine in order to possibly
unbloc k it.
Check the fuel
Check the canister
draining valve♦♦♦♦
Check the engine
co
mp ression
Check the
engine flywheel
Check the step-by-
step engine
♦♦ ♦♦
♦
♦
Check if there are no broken tubes.
Check the state of the sparking plugs and the ignition coil.
Check the tubes and
hoses
♦♦♦♦
Check the ignition♦♦♦♦
Check the flow and the pressure of the fuel: the condition
of
the petrol-pump, of the pressure regulator. Check the
injectors (flow, shape of jet)
Check if the exhaust circuit is not strangled-up and the
cata lyst is not stopped-up.
Check the fuel-
supply circuit
♦♦♦♦
Check the exhaust
system
♦♦♦♦
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E7J-A-2/60 ENGINE17
IGNITION AND INJECTION
17 - 67
DIAG
NOSING-BREAKDOWN LOCALIZATION ALGORITHM
IDLE MODE PROBLEMS
Do not use this information before having done the complete check-
up w ith the tester!2.
SUGGESTIONS
Check if there is petrol in the fuel tank (do not rely on the
on-board indi ces). Check if it is the fuel recommended by
the manufa cturer.
Check the fuel

Check if there are no broken tubes.
Check the tubes and hose
s.
♦
♦
Check the state of the sparking plugs and the ignition coil.
Check, on the o il ga uge , if the le ve l of the oil is not too h igh.
Connect the tester “CLIP” and do the test corresponding
to the check-up of the rotation signal.
Gently touch the step-by-step engine in order to possibly
unblock it.
Check the condition of the fittings.
Check, after taking them apart, whether the injectors leak.
Check if the clapper body is not clogged.
Check the ignition
Check the engine oil level
Ch eck the step-by-step engine
Check the intake collector
Check the injectors
Ch eck the body of the clapper
♦
♦
Check the engine flywheel♦
♦
♦
♦
♦
Check the flow and the pressure of the fuel: the condition
of the pe trol-pump, of the pressure regulator. Check the
injectors (flow, shape of jet)
Check if the exhaust circuit is not strangled-up and the
cata lyst is not stopped-up.
Check the fuel-supply
circuit
Check the exhaust system
♦
♦
A
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1. CHECKING WATERTIGHTNESS OF CIRCUIT
The MS 554-01 adapter is mounted instead of the valve of the de-gassing pot.
The MS 554-07 device is connected to the adapter.
The engine is heated, and then stopped.
the pump is used in order to put the circuit under pressure. The pumping is stopped at a value 0.1 bar smaller than the tare value of the valve ( 1.2 bar).
Th e pr essure must not go down; otherwise, the leak is looked for.
Th e junction of the device for cooling system decompression is progressively unscrewed,
then the apparatus is taken off and the valve of the de-gassing pot, equipped with a new fitting,
is mounted.
2. CHECKING WATERTIGHTNESS OF CIRCUIT
The MS 554-06 devi ce, then the pressure in the circuit is reestablished; this pressure must
become stable at the tare value of the valve with the control tolerance of +/-0.1 bar.
Th e tare value of the valve of the de-gassing pot: 1.2 bar.
19
COOLING - EXHAUS T - FUEL TANK
CONTROL
19 - 03
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19 - 13
19
COOLING - EXHA U ST - FUEL TANK
CLEANING
It is very important t hat the fitting surfaces of the aluminum parts should not be scratched.
Use Decapjoint to dissolve the particles of fitting that are left stuck to them.
The pa ste i s applied onto the c leaning surface and then you wait for approx. 10 minutes,
then it is removed with a wooden spatula.
Du ring this operation you should used protection gloves.
R
EMO UNTING
The watert ightness of the water-pump is done with LOCTITE 518; the H cord has the
thickness of 0,6-1 mm and must be applied according with the chart below. The distri bution belt is re-mounted (see Chapter “ Distribution belt ”).
The cooling circuit is filled and dra ined (see Chapter “ Filling and Draining”).
WATER PUMP
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19 - 16
19
COOLING - EX HA U ST - FU EL TANK
IMPORTANT
Duri ng the interventions affecting t he
petrol tank and the fuel supply circuit one
must not smoke or bring incandescent
parts near the work-place.
The emptyi ng of the tank does not require
taki ng apart the tank. Ac ces s is allowed
through the inside of the car (i.e. the boot). To take apart:-the carpet of the boot;
-t he lid of the visiting mouth (by taking
off th e four screws);
-the c lick-collar 1 is ta ken out by means
of the MOT 1202 device;
-a t ube is adapted to the A outlet, which
should be long enough to be introduced into a
ve ssel outside the car. The
H relay of the petrol-pump is taken out of
the fuse box located in the engine compartment,
and term inals 3 and 5 of the re lay connector are
shunted, thus ensuring the operation of the petrol
pump ( 12 V).
Th e operation of the pump will be stopped
when an intermittent leakage of the petrol is no-
ticed. The shun t is taken off.
The relay is mounted.
EMPTYING OF TANK
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19 - 21
19
COOLIN G - EX HA U ST - FU EL TANK
IMPOR TA NT
Duri ng the interventions affecting the petrol tank and the fuel supply circuit one
must not smoke or bring incandescent parts near the work-place.
TA K I N G APART
The taking apart of the petrol pump does not require the taking apart of the tank; access
is allowed through the inside (the boot) of the car.
To be taken apart:
-the carpet of t he boot;
-the visiting inlet lid, by taking off the four screws 1;
Collar 2, which fixes the airi ng conduit on the lid of the tank, is taken apart;
Junctures 3 of the fuel-supply conduits (going- and return-) are taken apart from the lid
of the tank;
Electric connector 4 is disconnected from the lid of the petrol tank.
1
ELECTRIC PETROL PUMP
3
3
4 2
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83
INSTRUMENT PANEL
83-10
FUEL LEVEL TRANSMITTER REPLACEMENT
DISMOUNTING
Disconnect the battery.
Dismount the fuel tank-visiting cap, by acting upon the attachment screws.
Disconnect the transmitter connector from the rear wiring / fuel tank cap.
D etach the clips of the hoses connected to the fuel tank cap.
Rotate the probe attachment flange from right to left, by about 1/3 rotation, until it is released
from the attachment shoulders.
Pull out the assembly fuel tank cap-fuel pump-level transmitter;
Dismount the attachment screws of the fuel level transmitter.
REMOUNTING
Perform in the reverse order the dismounting operations, checking carefully the condition of
the tank cap-sealing gasket.
ELECTRIC TESTS – FUEL LEVEL TRANSMITTER
PO SITION OF THE FUEL LEVEL R
INDICATOR ON INSTRUMENT PANEL transmitter
(W)
4/4 7+/-15 %
3/4 50+/- 5 %
1/2 97+/- 5 %
1/4 162+/- 3 %
0 280+/- 3 %
minimal level warning -
FUEL LEVEL TRANSMITTER
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