1987 MAZDA 626 fuel pump

4D FUEL SYSTEM
Overhaul
Service point
1. For overhauling the injection pump, see the "Repair Service and Maintenance" manual prepared
by the manufacturer of the pump.
2. If the inside of the injection pump is disassembled for maintenance, be sure to properly use the
checking device such as the pump tester.
76G04D-068
Manufacturer of Injection Pump:
Diesel Kiki Co., Ltd.
63G04D-312
Construction of VE Injection Pump
Servo diaphragm
Boost compensation stopper
p^ ^-Fue! cut solenoid
valve
'Cold start device
63G04D-313
4D—28

VE-TYPE RF71 13 800C: 104749-0343 For RF-CX
# TEST OIL SAE Standard test oil (SEA 967C)
Fuel injection amount Chamber pressure and timer stroke Load sensing timer and overflowing quantity Measurenment
Item Pump speed (RPM) Fuel injection amount
(cm3/stroke)
Start 100 More than 55/1,000
Full load
600 33.9—38.9/1,000
Full load
1,000 48 9—50.9/1,000
Full load 2,150 39.7—44 7/1,000 Full load
2,250 32.7-37.7/1,000
Full load
2,550 8.0—15.0/1,000
Idling 360 7.6—10.6/1,000
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CD
50
40
30
20
10
Pump speed (RPM) Chamber pressure
(kg/cm2)
Timer stroke (mm)
500 500
1,250 4.5—5.1 2.7—3.9
1,500 5.2—5.8 4 3-4.9
2,150 6.8—7 4 7.6-8.8
Item Fuel injectioon amount
(cm3/stroke)
Load sens-ing timer
Start 37.2-39.2/1,000 Load sens-ing timer End 32.2-34.2/1.000
Overflowing quantity 41.0—85.0/1.000
"Checking condition
Pump speed: 1,500 rpm
Lever: Full load
Measuring place Dimension (mm)
KF 5.7—5.9
K 3.2—3.4
MS 1.6-1.8

/ J*
—
s
100 600 1,000 1,250 1,500
Injection pump speed RPM
10
2,150 2,250 2,550
CD
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VE-TYPE RF79 13 800A: 104748-0343 For RF-N ENGINE
£ TEST OIL SAE Standard test oil (SEA 967C)
Fuel injection amount Chamber pressure and timer stroke Load sensing timer and overflowing quantity Measurenment
Item Pump speed (RPM)
Fuel injection amount
(cm3/stroke)
Start 100 More than 42/1,000
Full load
600 29.0—33.0/1,000
Full load
1.375 34.9—36.9/1,000
Full load 2,325 30 2—34.2/1,000 Full load
2,600 9.8—15 8/1,000
Full load
2,700 Max. 6 0/1,000
Idling 360 8-12/1,000
Pump speed (RPM) Chamber pressure
(kg/cm2)
Timer stroke
(mm)
600 2 2—2.8
1,375 4 4—5,0 3 9—4.5
1,800 5 6—6.2 6.1-7.3
2.325 6.9—7.5 7.2—8.4
Item Fuel injectioon amount
(cm3/stroke)
Load sens- Start 26.7-29.7/1,000
ing timer End 14.6—17.6/1,000
Overflowing quantity 46.3—90.3/1.000
'Checking condition
Pump speed: 1,375 rpm
Lever: Full load
Measuring place Dimension (mm)
KF 5.8—5.9
K 3.2—3 4
MS 1.4—1.6
c (D O
o'
3 03 3 o c 3
O 3
o o o
o
CD
50
40
30
20
10
r
10
100 600
o o
1,375 1,800
Injection pump speed RPM
2,325 2,600 2,700
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4D FUEL SYSTEM
Inspection
Injection starting pressure
1. Set the nozzle on the nozzle tester.
2. Bleed the air by pumping the nozzle tester handle
several times.
3. Slowly lower the nozzle tester handle and check
the pressure when injection starts.
Injection starting pressure:
13,200 kPa (135 kg/cm2, 1,920 lb/in2) at
20°C (36°F) of fuel temperature
76G04D-073
Adjusting shim
4. If the injection starting pressure is higher than
specification, increase the shim thickness. If the in-
jection starting pressure is lower than specification,
decrease the shim thickness.
Note
Adjusting shims are availabe in 0.05 mm
(0.0197 in) thicknesses, from 1.0 mm (0.039
in) to 1.95 mm (0.077 in). When 0.05 mm
(0.0197 in) is added, injection pressure in-
creases approx. 490 kPa (5.0 kg/cm2, 70 psi).
76G04D-074
Nozzle leakage
1. Apply 11,300 kPa (115 kg/cm2,1.640 psi) pres-
sure to the injection nozzle, and check for fuel leaks
from the injection hole.
2. If fuel leaks, overhaul or replace the' injection
nozzle.
76G04D-075
Atomization (spray pattern)
1. Set the injection nozzle on the nozzle tester.
2. Bleed the air by operating the nozzle tester han-
dle several times.
3. Lower the handle several times as quickly as pos-
sible so that a pulsating whistling sound is heard,
and check the atomization.
(1) Uniform and proper atomization
(2) Incorrect injection angle and direction
4. If necessary, overhaul or replace the injection
nozzle.
76G04D-076
4D—32

30 TECHNICAL DATA
4A. FUEL AND EMISSION CONTROL SYSTEM (CARBURETOR)
F6 and F8 Engine
Engine F6 F8
Spec. General Singapore General
ECE, Hong
Kong, &
Singapore

Idle speed rpm MTX 800
+ 50
0 Idle speed rpm ATX (in
N
range)
—
950 +58 900
+ 50
0
CO concentration °/o 2.0
± 0.5
Carburetor

Type Down draft two barrel
Throat diameter mm (in) Primary 30 (1.18) Throat diameter mm (in) Secondary 34 (1.34)
Venturi diameter mm (in) Primary 23.5 (0.93) Venturi diameter mm (in) Secondary 29.0 (1.14)
Main nozzle mm (in) Primary 2.6 (0.10) Main nozzle mm (in) Secondary 2.8 (0.11)
Primary MTX 1.10 1.09 (0.0429) 1.14 (0.045)
Main
jet
mm (in) Primary ATX (0.0433) 1.08 (0.0425) 1.12 (0.044)
Secondary 1.50 (0.059)
Primary MTX 0.60 0.60 (0.024) 0.55 (0.022)
Main
air
bleed mm (in) Primary ATX (0.024) 0.80 (0.031) 0.60 (0.024)
Secondary 0.50 (0.020)
Slow
jet
mm (in) Primary 0.48 (0.019) 0.46 (0.018) Slow
jet
mm (in) Secondary 1.00 (0.039) 1.10 (0.043)
Primary No.
1
0.80 (0.031)
Slow
air
bleed Primary No.
2
1.90 (0.075)
mm (in) Secondary No.
1
1.00 (0.039) 0.80 (0.031) Secondary No.
2
0.50 (0.020)
Power
jet
mm (in) 0.50 (0.020)
Fast idle adjustment
mm (in)
Clearance between primary throttle valve and bore 1.40-1.76(0.055-0.069) MTX: 0.48-0.64 (0.019-0 025) ATX: 0.56-0.72 (0.022-0.028)
Max. fuel flow
"L"
44 (17.3)
Float level adjustment Clearance between float and
air
horn without gasket
mm (in) Fuel stop
"H •
12.5 (0.49)
Clearance between float and
air
horn/without gasket; float lowered
by
own weight
Choke breaker diaphragm Start 180-240 (7.1-9.5) 100—160 (3.9-6.3)
mmHg
(in Hg)
Stop 290—350 (11.4-13.8) 220-280 (8.7-11.0)
Choke opener Start
—
35-65 (1.4-2.6)
—
35-65 (1.4-2.6)
mmHg
(in Hg)
Stop
—
130-190 (5.1-7.5)
—
130-190
(5,1-7.5)

Accelerator linkage

Free plav
of
cable
at
carburetor mm (in) 1-3 (0.039—0.118)

Fuel tank

Capacity Liters (US gal, Imp gal) 60 (15.9, 13.2)

Fuel pump

Type Mechanical pump
Delivery pressure kPa (kg/cm2,
psi)
20-26 (0.20-0.27, 2.8-3.8)
Feedina capacity cc/min (cu in/min) More than 860 (52.5)
at
idle

Fuel filter

Type Paper element with magnet

Air cleaner

Fresh-Hot switching Manual Diaphragm type
Element
tvDe
Oil permeated paper
Fuel specification Leaded regular

30-18

TECHNICAL DATA 30
FE Engine
Engine 8 Valve 12 Valve 8 Valve
Spec. General Middle
East
ECE,
Hong Kong, &
Singapore
Unleaded
Fuel
(West Germany)

Idle speed rpm MTX 800
+5§
850 Idle speed rpm ATX 900 +5S
(ir
N range)
CO concentration
%
2.0
± 0,5
Carburetor

Type Down draft, two barrel
Throat diameter mm (in) Primary 30 (1.18) Throat diameter mm (in) Secondary 34 (1.34)
Venturi diameter mm (in) Primary 23.5 (0.93) Venturi diameter mm (in) Secondary 29.0 (1.14)
Main nozzle mm (in) Primary 2.6 (0.10) Main nozzle mm (in) Secondary 2.8 (0.11)
Primary MTX 1.14 (0.045) 1.09 (0.0429) 1.14 (0.045) 1.09 (0.0429) Main
jet
mm (in) Primary ATX 1.12 (0.044) 1.08 (0.0425) 1.12 (0.044) 1.09 (0.0429)
Secondary 1.55 (0.061) 1.50 (0.059) 1.55 (0.061) 1.50 (0.059)
Primary MTX 0.50 (0.020) 0.60 (0.024) 0.50 (0.020) 0.50 (0.020) Main
air
bleed mm (in) Primary ATX 0.55 (0.022) 0.80 (0.031) 0.55 (0.022) 0.50 (0.020)
Secondary 0.50 (0.020)
Primary 0.46 (0.018)
Slow jet mm (in) Secondary MTX 1.10 (0.043) 1.00 (0.039) 1.10 (0.043) 0.90 (0.035) Secondary ATX 1.10 (0.043) 1.00 (0.039) 1.10 (0.043) 1.00 (0.031)
Primary No.
1
0.80 (0.031)
Slow
air
bleed Primary No.
2
1.90 (0.075)
mm (in) Secondary No.
1
0.80 (0.031) 1.00 (0.039) 0.80 (0.031) 1.00 (0.039) Secondary No.
2
0.50 (0.020)
Power jet mm (in) MTX 0.50 (0.020) 0.50 (0.020) Power jet mm (in) ATX 0.50 (0.020) 0.40 (0.016)
Fast idle adjustment mm (in) MTX 0.48-0.64 (0.019-0.025) 1 40—1
76

0.48-0.64 (0.019-0.025) 1
40
1
76
Clearance between primary throttle valve and bore ATX 0.56-0.72
(0.022-0.028) (0.055-0.069) 0.56-0.72 (0.022-0.028) (0.055-0.069)
Max. fuel flow
"L"
44 (17.3)
Float level adjustment Clearance between float and
air
horn without aasket
mm (in) Fuel stop
"H •
12.5 (0.49)
Clearance between float and
air
horn without aasket float lowered
bv
own weiaht
Choke breaker diaphragm Start
100-160 (3,9-6.3) 180-240 (7.1-94) 100-160 (39-6.3) 180-240 (7.1-9,4)

mmHg
(in Hg)
Stop
220-280 (8.7-11,0) 290-350 (11,4-13.8) 220-280 (8.7-11.0) 290-350 (11.4-13.8)

Choke opener mmHg (in
Hg)
Start
—
80-120 (3.1-8.7) 30-70 (1.2-2.8)
—
Choke opener mmHg (in
Hg)
Stop
—
220-280 (87-11.0) 130-190 (5.1-7.5)
—
Accelerator llnkaae

Free play
of
cable
at
carburetor mm (in) 1-3 (0.039-0.118)

Fuel tank

Capacity Liters (US gal, Imp gal) 60 (15.9, 13.2)

Fuel pump

TvDe
Mechanical pump
Delivery pressure kPa (kg/cm2,
psi)
20-26 (0.20-0.27, 2.8-3.8)
20-29 (0.20-030, 2.8-4.3) 20-26
(020-0.27, 28-38)

Feeding capacity cc/min (cu in/min) More than 860 (52.5)
at
idle

Fuel filter

TvDe
Paoer element with maanet

Air cleaner

Fresh-Hot switchina Diaohraam Manual Diaohraam Bimetal
Element tvoe Oil oermeated oaoer
Fuel specification Leaded super Unleaded super Leaded regular Leaded super Unleaded super Unleaded regular

30-19

30 TECHNICAL DATA
4B. FUEL AND EMISSION CONTROL SYSTEMS (FUEL INJECTION FE)
Item Specifications

Fuel tank capacity Liters (US gal, Imp gal) 60 (15.9, 13.2)
Fuel pump
Type In-tank, electric motor
Fuel pump Fuel pressure kPa (kg/cm2, psi) 441-588 (4.5-6.0, 64-85) Fuel pump
Feeding capacity cc (cu in)/10 sec. 220 (13.4) min.
Air cleaner Element type Oil permeated
Accelerator cable Deflection
mm
(in) 1—3 (0.04-0.12)
Idle speed
rpm
ATX: 800 +58 (Neutral), ATX: 900 +600
(P
range)
Dash
pot
Adjustment speed
rpm
1,900-2.100
EGR control valve Starts
to
open mmHg (in Hg) 40-60 (1.6-2.4)
Air control valve Starts
to
open mmHg (in Hg) 180-280 (7.1-11)
Water thermo valve Opened
°C
(°F) Higher than 46—54 (115-129)
Water thermo switch Opened
At
radiator
°C
(°F) Lower than 15—19 (59—66)
Vacuum switch valve Starts to open mmHg (in Hg) 66—106 (2.6—4.2)
Water thermo sensor Resistance
-20°C (-4°F)k!) 14.5-17.8
Water thermo sensor Resistance 20°C (68°F)
kQ
2.2-2.7 Water thermo sensor Resistance
80°C (176°F)k!i 0.28-0.35
Throttle sensor
Resistance
at

fully closed
B
C kQ
4-6
Throttle sensor
Resistance
at

fully closed A
« B Q
Approx.
500

Throttle sensor Resistance
at
fully opened A
«• B kQ
Approx.
4.5
Throttle sensor
Setting Closed at mm (in) 0.4 (0.0157)
Throttle sensor
Setting Open at mm (in) 0.55 (0.022)
Air flow meter
Resistance
of

full closed

E2 « Vs fi
More than
20

Air flow meter
Resistance
of

full closed

E2 •+ Vc 0
100-300
Air flow meter
Resistance
of

full closed
E2 VB Q
200-400 Air flow meter
Resistance
of

full closed
Ei
•+ Fc Q OO
Air flow meter
Resistance
at
full open Ei
•+ Fc Q
0
Intake
air
thermo sensor Resistance
-20°C M°RkQ 13.6-18.4
Intake
air
thermo sensor Resistance 20°C (68°F) kfi 2.21—2.69 Intake
air
thermo sensor Resistance
60°C (140°RkQ 0.493-0.667
Pressure regulator Regulating pressure At idling kPa
(kg/cm
,
psi) 235-275 (2.4—2.8, 34-40)
Injector
Injection amount cc (cu in)/15 sec. 38-53 (2.3-3.2) Injector
Resistance
Q
12-16
Circuit opening relay Resistance STA Ei Q 15-30 Circuit opening relay Resistance B
Fc fi
80-150
Fuel Unleaded gasoline

30-20

TECHNICAL DATA 30
4C. FUEL AND EMISSION CONTROL SYSTEM (FE DOHC)
Item ^Engine^model Unleaded fuel Leaded fuel

Idle speed rpm With test connector grounded 750
± 50
Throttle body

Type Horizotal draft (2-barrel)
Throat diameter mm (in) No.1 46 (1.8) Throat diameter mm (in) No.
2
40 (1.6)

Fuel pump

Type Impeller (in tank)
Output pressure kPa (kg/cm2,
psi)
Main pump: 441—588 (4.5—6.0, 64—85)
Transfer pump: 20—25 (0.20—0.25, 2.8—3.6)
Feeding capacity cc (cu in)/10 seconds Main pump: 220 (13.4) min. Transfer pump: 190 (11.6) min.

Fuel filter

Type Low-pressure side Nylon element Type High-pressure side Paper element

Pressure regulator

Type Diaphragm
Regulating pressure kPa (kg/cm2, psi) 235-275 (2.4 -2.8, 34-40)

Injector

Type High-ohmic
Type
of
drive Voltage
Resistance
ft
12--16
Injection amount cc (cu in)/15 seconds 66-91 (4.03-5.55)

Idle speed control valve

Solenoid resistance Q 6.3--9.9

Fuel tank

Capacity liters (US gal, Imp gal) 60 (15.9, 13.2) 57 (15.0, 12.5): 4-wheel steering vehicle

Air cleaner

Element type Dry

Fuel

Specification Unleaded (95 RON
or
more) i Leaded (95 RON
or
more)

30-21