1995 RENAULT MEGANE SCENIC engine

FUEL SUPPLY
Supply pressure
13
CHECKING THE FUEL SUPPLY PRESSURE
SPECIAL TOOLING REQUIRED
Mot. 1311-01 Fuel pressure test kit (with 0 ;+
10 bars pressure gauge included)
99217R1
Disconnect the rear fuel pipe.
Fit the three way valve (1) from tool Mot. 1311-01
and connect the 0 ; + 10 bars pressure gauge.
Shunt terminals (3) and (5) of the fuel pump relay
located in the engine fuse box.
The pressure should be 3 bars ± 0.2.When a vacuum of 500 mbars is applied to the
fuel pressure regulator, the pressure should be
2.5 bars ± 0.2.
CHECKING THE PUMP SAFETY VALVE (under the
same conditions as previously)
Shunt terminals (3) and (5) of the fuel pump relay
(see diagram on page 13-2).
When the fuel return pipe is clamped briefly by
the two position valve, the pressure should
stabilise between 4.5 and 7.5 bars.
F3R engine
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Specifications
13
Vehicle GearboxEngine
Type SuffixBore
(mm)Stroke
(mm)Capacity
(cm
3)RatioCatalytic
converterDepollution
standard
BA0U JB3 F8Q 620 80 93 1 870 21.5/1 None EU93
BA0A JB3 F8Q 620 80 93 1 870 21.5/1 C25 EU96
ENGINE SPEED (rpm.)
Idle speed Maximum no loadMaximum with
load
SMOKE OPACITY
Homologation value Legal maximum
825 ± 25 5 200 ± 100 4 600 ± 100 1.24 m
-1 (40 %) 2 m -1 (55 %)
DESCRIPTION MAKE /TYPE SPECIAL NOTES
Injection pump
Pumps R598-2 and R598-3 differ
in that a coded fuel shut off
valve has been addedBOSCH
VE 4/8F 2300R598
VE 4/8F 2300R 598-1*
VE 4/8F 2300R 598-2
VE 4/8F 2300R 598-3*Rotary pump with:
- separate idle lever
- solenoid controlled load dependence (ALFB)
- post-heating and EGR cut-out microswitch
- air conditioning cut-out microswitch*
Pump timing obtained by 8mm
diameter TDC pin (Mot. 1079)Pump piston lift: 0.82 ± 0.04 mm
(the setting value is stamped on the load lever)
Injector holders
BOSCH KCA 17 S 42Tightening torque : 7 daN.m
Injectors BOSCH
DNOSD 302 Test: 130 bars
Maximum gap: 8 bars
Fuel filter
PURFLUXPriming pump
The filter is fitted with an electrical fuel heater
EGR solenoid valve Voltage: 12 volts
Resistance : 10 ± 5 Ω
Fuel pipes External diameter : 6 mm
Internal diameter : 2.5 mm
Length: 400 mm
Pre-heating unit
NAGARESWith pre-post-heating function and cold start
functions and fast idle solenoid
Heater plugs BOSCH Current: 15 A approximately after 8 seconds
heating
Tightening torque : 2 daN.m
+8
- 5
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Description of the pump
13
99337R2
1Load dependence control solenoid valve (ALFB)
2Fuel shut off solenoid
3Microswitch for cutting post-heating and exhaust gas recirculation (EGR)
4Air conditioning microswitch
5Residual flow stop screw (anti-stall)
6Maximum engine speed stop screw (no adjustment may be made except at a Renault Injection Centre)
7Normal idle speed adjustment stop screw
8Fast idle speed adjustment stop screw
9Coded solenoid valve electronic unit
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Special notes
13
ALFB (solenoid controlled load dependence)
ROLE
To eliminate the action of LFB load dependence
(internal drop in pressure in the pump and
therefore advance), depending on the engine
temperature and atmospheric pressure.
OPERATION
1. Control by pre-post-heating unit
a)As long as the coolant temperature is <
29°C, the solenoid valve is fed when the
ignition is turned on.
b)If the coolant temperature sensor is faulty,
the solenoid valve is fed when the ignition
is turned on depending on the air
temperature (the air temperature sensor
is located in the pre-post-heating unit).c)If both the coolant and air temperature
sensors are faulty, the solenoid valve is fed
for 200 seconds when the ignition is
turned on.
LOCATION
Coolant temperature sensor (1) (black connector)
DI130198904R
SPECIFICATIONS
Temperature in °CResistance Ω
252 610 to 2 990
80310 to 350
Coolant temperature sensor faulty
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Special notes
13
2. Control by altimetric capsule
At altitude, when atmospheric pressure is
approximately 925 ± 20 mbars, the ALFB
solenoid valve is fed via a relay and the
altimetric capsule.
KEY
257Pre-heating unit
597Engine fuse box
711ALFB solenoid valve mounted on injection
pump
741Altimetric capsule
743Altimetric relayLOCATION
Altimetric capsule (741)
PRJ9925799334R
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Idle speed settings
13
These adjustments must be made when the engine is warm, after the cooling fan assemblies have operated at
least twice.
99337R3
ADJUSTING THE IDLE SPEED AND THE RESIDUAL
FLOW (anti-stall)
Slacken the residual flow screw two turns and
check that the load lever is touching the screw.
Adjust the idle speed to 825 ± 25 rpm using screw
(1).
Fit a 4mm shim between the load lever (2) and
the residual flow screw (3).
Adjust the engine speed to 1 150 ± 25 rpm using
the residual flow screw (3).Remove the 4 mm shim then accelerate sharply
twice.
Check the idle speed setting is correct; if necessary
adjust the idle speed again and recheck the
residual flow setting.
The idle speed and anti-stall function must be set
correctly since they have a direct effect on engine
behaviour at idle speed and during deceleration
(hesitation, idle speed remains operative, etc...).
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Idle speed settings
13
ADJUSTING THE FAST IDLE SPEED
Set the separate idle speed lever (4) against the
fast idle screw (5), then adjust the engine speed to
950 ± 25 rpm using this screw (5).
ADJUSTING THE POSITION OF THE FAST IDLE
CABLE GRIP
(when the idle speed and residual
flow settings are correct )
Check that the separate idle speed lever (4) is
against the idle speed screw (1).
Hold the cable taut.
Position the cable grip at a distance of :
-6 mm
± 1 (without air conditioning)
from lever (4)
-2 mm ± 1 (with air conditioning)
from lever (4)
NOTE : vehicles fitted with the air conditioning
option are fitted with a fast idle control
diaphragm operated pneumatically by a solenoid
valve. Fast idle is obtained during post-heating or
when air conditioning is selected (see operating
diagram in the pre-heating section).
ADJUSTING THE DECELERATION DAMPER (6)
When the adjustments above have been made,
the deceleration damper must be adjusted as
described below.
Slacken screws (7) to release the lever (A).
Fit a 1 mm shim between the deceleration damper
and the lever (A).
Push lever (A) on the deceleration damper to the
stop.
Ensure the load lever (2) remains in contact with
the residual flow screw (3).
Tighten the screws (7) in this position.
Remove the adjusting shim and ensure there is
contact between the load lever (2) and the
residual flow screw (3).
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Pump
13
SPECIAL TOOLING REQUIRED
B.Vi. 868 Wrench for removing high
pressure pipe
Mot. 909-02 12 sided wrench for removing
injection pump mounting
Mot. 997 Socket for removing injector
holder
Mot. 1053 Pump pulley extractor
Mot. 1054
TDC pin
Mot. 1200 Pump pulley retaining tool
REMOVAL
Battery disconnected, remove:
- the suspended engine mounting housing (1),
- the injection pump pulley housing (2).
DI1302-199183R
Immobilise the engine using tool Mot. 1054. To do
this, turn the engine so that the camshaft sprocket
index is aligned with the timing cover reference
mark.
Disconnect the fuel supply pipe at the injection
pump end.
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