Dacia SuperNova (engine E7J). Service manual — part 20
14
E7J-A-2/60 ENGINE
ANTI-POLLUTION
1.
I NTAK E
CO LLECTOR
2.
CARBO N
CANISTER
3.
DRAINING
VALVE
4.
CLAPPER
BO DY
R.
CH ANNELING
FRO M
TH E
TANK
PETROL VAPOURS-ASPIRATION
FUNCTIONING SCHEMA
14 - 1
14
E7J-A-2/60 ENGINE
ANTI-POLLUTION
RE-ASPIRATION CONDITIONS
The canister-purging valve is controlled by pin 4 of the UCE injection, when :
- water temperature > 50
o
C;
- air temperature > 15
o
C;
- the valve position outside idle position.
It is possible the reading of the RCO value ( opening cyclic ratio ) of the canister
purging valve, by means of the CLIP tester.
THE CHECKING OF THE CANISTER PURGING VALVE OPERATION
A non-operation of the petrol vapors re-aspiration system may lead to the fuel con-
sumption increase and to a unstable idling.
It is necessary to check if the purging valve exit is correctly connected to the carbon
canister. Check also the piping condition between the canister and the fuel tank (sealing,
clogging on layout).
PETROL VAPOURS-ASPIRATION
14 - 2
1.
CO LLECTEUR
ADMISSION
2.
SO UPAPE
PURG E
3.
CANISTER
4.
RESERVO IR
14
E7J-A-2/60 ENGINE
ANTI-POLLUTION
Check at idling if there is a depression, by fitting a pressure gauge (-3…+ 3 bars) at the
purging valve exit (B) towards canister.
Is there any depression?
YES - Set off the contact . Using a vacuum pump, apply a 500 mbars depression at
the (C ) connection of the purging valve. The value of the read depression must not vary
more than 10 mbars within 30 seconds. If change is more than 10 mbars, then purging
valve is damaged and must be replaced. Valve cleaning of small active carbon particles
may be tried, by low-pressure compressed air blowing at the valve (B) connection
NO - When conditions of purging valve controlling are accomplished and this one
does not open, check its control electric circuit ( between UCE injection pin 4 and purging
valve), from continuity or short-circuit point of view.
The RCO value of the signal received by the purging valve from the computer, may be
read by means of the CLIP tester in PROL 23. The minimal value is of 0.7% (corresponding
to the closed position of the purging valve).
P
LACING
- D
ISMO UNTING
Both the carbon canister and the draining valve are mounted by means of a stand on the
lining of the right-side front wing of the car.
The channellings of the canister and the electric conector commanding the draining
valve are disconnected;
The sleeve for fixing the draining valve is taken off and the valve is taken apart.
The carbon canister is taken apart.
R
EMOUNTING
Perform in the reverse order the dismounting operations.
14 - 3
PETROL VAPOURS-ASPIRATION
E7J-A-2/60 ENGINE
16
16 - 1
STARTING AND CHARGING
I
DENTIFICATION
E
NGINE
A
LTERNATOR
I
NTENSITY
E7J - A-2/60
VALEO A11 VI 87
75A
VALEO A13 VI 212
80A
I
NSPECTION
After 15 minutes’ warming under a 13.5 V voltage.
ENGINE REVOLUTION
A
LTERNATOR
75 A
A
LTERNATOR
80A
RATIO (rot/min)
(A)
(A)
1000
46
54
2000
68
75
3000
71
80
4000
72
82
FUNCTIONING AND DIAGNOSING
These cars are equipped with internal ventilation alternators, with in-built voltage regu-
lator and on-board light indicator, which must work as follows:
-when the contact is on, the light is on;
-when the engine starts, the light goes out;
-if the light is on again as the engine is running, then it indicates a charging dysfunc-
tion.
S
H O OT
-
FINDING
INCIDENTS
A.The light does not turn on when the contact is on.
To check:
-if the electric connections are done properly;
-if the light of the board indicator is working properly (when the circuit is set to the
mass, the light must turn on).
ALTERNATOR
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