2004 DACIA SUPERNOVA fuel pressure

E7J-A-2/60 ENGINE17
IGNITION AND INJECTION
17 - 14
RO
AD TEST RESULTS INTERPRETATION
In case of fuel l ack (choking up injectors, pressure and fuel flow too small, etc) the
value of t he PR 035 para meter shall i ncrease, in order that an enrichment a s close as
possible to 1 is obtained, and the values PR 031 and PR 030 shall increase so that PR 035
is reaching a value around 128. For a correct operation it i s recommended c hemical or ultra sonic cleaning of the injectors
each 30 000 km. In case of a fue l e xcess (not sealed injectors or t heir needle is not properl y closing ..) the
reasoning is conversely: the values of PR 035, PR 031 and PR 030 parameters shall decre ase
to enable bringing the PR 035 to a value around 128.
OBSERVATION
The values read for PR 030 and PR 031 are offering an opinion about the air/ petrol
mixture t he e ngine is runni ng with. In order t o be useful at diagnosis, we c an not c onclude
unless the values a re on maximum or on minimum and their di splacement is i n t h same
direction. These values must be analyzed only in case of a client claiming an operation
defect and if they are on the maximum or minimum values, related with the PR 035 values,
greater than 175 or smaller than 80. ENRICHING ADAPTIVE CORRECTION
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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 - 17
19
COOLING - EXHA U ST - FUEL TANK
The fuel tank has a watertight stopper; the inlet for the fi lling with unleaded fuel has a
filling orifice incompatible with a classical filling gun (as lead has a negative effect on the
anti-pol lution system, the oxygen probe and the catalyst).
THE ANTI - TILT VA L V E
In case the car is tilted / overthrown, the valve gets blocked, thus avoiding petrol from spilling
towards the carbon canister or the filling inlet.
T
HE SECURITY VALV E
In case the petrol vapour recycling circuit is stopped up, the security valve avoids over-pres-
sure or under-pressure in the tank. It is mounted with the red-marked end towards the joining tube “T”, and with the white-marked
en d towards the tube linking it to the filling inlet.
TANK FU EL DESCRIPTION
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83
INSTRUMENT PANEL
CONNECTOR C
1. Instrum ent panel lighting
2. Ground
3. Anti starting indicator
4. Supply (+ IC)
5. Free
6. Injection failure indicator
CO NNECTOR D
1. Battery charging circuit failure indicator
2. Fuel minimum level warning
3. Free
4. Free
5. Free
6. Free
7. Free
8. Free
83-2
The corresponden
ce between the positions from A,B,C,D connectors of the instrument panel
and the components of the vehicle electric equipment is the following :
CONNECTOR A
1. Free
2. Rear window defrosting indicator
3. RPM
4. Cooling fluid temperature indicator
5. Oil pressure warning
6. Cooling fluid temperature warning
7. Left turning indicator
8. Left turning indicator
9. Hazard lights indicator
10. Instrument panel ground
CONNECTOR B
1. High beam indicator
2. Free
3. Free
4. Right turning indicator
5. Right turning indicator
6. Supply ()+DC)- after contact
7. Hand brake, braking system failure warning
8. Brake pads wear indicator
9. Free CO
NNECTORS ( until 01.06.2001)
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83
INSTRUMENT PANEL
83-4
CO
NNECTOR X
1. Low beam indicator
2. Anti starting indicator
3. Supply(+IC) anti starting indicator
4. Injection failure indicator
5. Oil pressure warning
6. Water temperature indicator
NOTE
In case of the interventions on the instrument panel, check the existence of the
rubbe r i solati ng ele ments on the windsc re en lower c ross bar, pl ac e d behi nd the
instrument panel. For the vehicles corresponding to the pollution norm EURO 2000, at the X c onnector,
position 4 is “ OBD anti-pollution failure indicator”. The i nstrument panel is provided with thre e connectors having the following pl ugs
correspondence:
CONNECTOR V
1. Instrum ent panel lighting
2. Ground
3. Rear window defrosting indicator
4. High beam indicator
5. RPM
6. Supply (+DC) after contact
7. Free
8. Ground
9. Right turning indicator
10. Left turning indicator CONNECTOR Z
1. Hazard indicator
2. Water temperature warning
3. Supply (+DC) after contact
4. Ground
5. ICP and handbrake warning
6. Brake pads wear warning
7. Fuel level indicator
8. Fuel level minimum warning
9. Battery charging indicator
CO
NNECTORS(after 01.06.2001)
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