fuel DATSUN 210 1979 Repair Manual

DATSUN
210
Model
8310
Series

SECTIONEC

EMISSION
CONTROL
SYSTEM

CONTENTS

GENERAL
DESCRIPTION

CRANKCASE
EMISSION

CONTROL

SYSTEM

DESCRIPTION

INSPECTION

EXHAUST

EMISSION
CONTROL

SYSTEM

DESCRIPTION

EARLY
FUEL
EVAPORATIVE

E
F
E
SYSTEM

AIR
INJECTION
SYSTEM
A
IS

AIR
INDUCTION

SYSTEM
A
I
S

EXHAUST
GAS
RECIRCULATION

E
G
R

1

CONTROL
SYSTEM
EC
2

EC
6

EC
6

EC
6

EC
7

EC
7

EC
8

EC
9

EC
18

EC
21
SPARK
T
MING
CONTROL
SYSTEM

CATALYTIC

CONVERTER

EVAPORATIVE
EMISSION

CONTROL
SYSTEM

DESCRIPTION

OPERATION

REMOVAL

AND
INSTALLATION

INSPECTION

SERVICE
DATA
AND

SPECIFICATIONS

INSPECTION
AND
ADJUSTMENT

TIGHTENING
TORQUE

SPECIAL
SERVICE
TOOLS
EC
26

EC

33

E
C
35

EC
35

EC
36

EC
36

EC
36

EC
38

EC
38

EC
38

EC
39

Emission
Control

System

CANADA
MODEL

1
Distributor

2
Vacuum

delay
valve
AfT

3
Thermal
vacuum
valve
E
G
R

4
Throttle
opener
vacuum
control
valve

S

To
air
cleaner

6
Throttle

opener
servo

diaphragm

7
Carbon
canister

8
Vacuum
motor

9
From
vacuum
motor
to
temperature

sensor

10
E
G
R
control
valve

11

Carburetor

12
From
idle

compensator
to
intake

manifold

13
To
A
B
valve

14
Anti
backltre
valve

A
B
valve

15
Vacuum

switching
valve
M
T

@

CD

ft

o@o

0

LA
T

CID

om
fuel

tank
Intake

manifold

Intake

manifold

@
It
Il
9

EC138A

Fig
EC
4
Emission

Control

System
Canada
model

EC
5

Emission
Control

System

EXHAUST
EMISSION
CONTROL
SYSTEM

DESCRIPTION

The
exhaust
emission
control

system
is
made

up
of

the

following

components

Early
fuel

evaporative
system
E

F
E

Air

injection
system

Air

induction

system

E

G
R

system

Spark

tirningcontrol
system

M
T

model

Spark
timing
control

system

A
T

model

Catalyst
Non
California

California

models
models

except
CanadaY
FU
model

Manifold

stove

Heat
valve

Air

pump

C
A
C
valve

A
B
valve

Check
valve
Air

pump

Air

relief
valve

A
B

valve

Check
valve

E
G
R

control
valve

Thermal
vacuum
valve
3

port
type

B

P
T
valve

Vacuum

switching
valve

Top
switch

Thermal

vacuum
valve
3

port

type

Vacuum

delay
valve

Non
California

models

only

Vacuum

switching

valve

Top
switch

Thermal
vacuum

valve
3

port

type
Vacuum
delay

valve

Thermal
vacuum

valve
3

port
type

Catalytic

converter

EC
7
Canada
models

Air
induction
valve

A
B
valve

E

G
R
control

valve

Thermal
vacuum

valve
2

port

type

B
P

T
valve
E

G
R
control

valve

Thermal
vacuum

valve
2

port

type

Vacuum

switching
valve

Top
switch

Catalytic

converter
Vacuum

delay

valve

Emission
Control

System

EARLY
FUEL
EVAPORATIVE
E
FE

SYSTEM

DESCRIPTION

@
jl
D

W

o

0
0
UL
@

1

Intake
manifold

9
Screw

2

Stove

gasket
10

Thermostat

spring

3
Mar
fold
stove
11

Heat
control
valve

4
Heat
shield

plate
12
Control

valve
shaft

5

Snap
ring
13
Exhaust

manifold

6

Countczwcight
14

Cap

7

Key
15

Bushing

8

Stopper
pin
16

Coil
spring

The

early
fuel

evaporative
system
is

provided
with
a
chamber
above
a

manifold
stove
mounted
between
the

intake
and
exhaust

manifolds

During

engine
warming
up
air

fuel
mixture
in

the
carburetor
is

heated
in

the
cham

ber

by
exhaust

gas
This
reuslts
in

improved
evaporation
of
atomized
fuel

droplets
in

the
mixture

and
in

smaller

content
of

hydrocarbons

HC
in
the

exhaust

gas

especially
in
cold
weather

operation

OPERATION

The

counterweight
rotates
counter

clockwise
and

stops
at

the

stopper
pin

mounted
on

the
exhaust
manifold

while
the

engine

temperature
is
low

With
this
condition

the
heat
control

valve
is
in

the

fully
closed

position

obstructing
the
flow

of
exhaust

gas
As

engine

temperature
goes

up
and
the

ambient

temperature
becomes

high

enough
to
actuate

the
thermostat

spring
the

counterweight

begins
to
j

@

l

7

1
1

5

If

@

I

Exhaust
gas
flows

valve
dosed

valve

opened

EC247

Fig
EC

8
Early
Fuel

Eaaporatiae
E
F
E

System

rotate
clockwise
and

again
comes
into

contact

with
the

stopper
pin
With
this

condition
the

heat
control
valve
is
in
the

full

open
position
and
exhaust

gas

passes
through
the

exhaust
manifold

without

heating
the
manifold
stove

REMOVAL
AND
INSTALLATION

1

Snap
ring

2
Lock
bolt

3

Key

4

Counterweight

5
Thermosta
t

spring

6
Coil

spring

7

Heat
controlvalve

EC913
8
Valve
shaft

Fig
EC

9
KF
E

Sy
tem
Component

EC

8

Emission
Control

System

r

@
@
CD

L

I

1
Air

pump
drive
hub

5
V
ne

2

Housing
6
Carbon
shoe

3
Rotor

rins
7
Shoe

spri
ng

4

End
cover
8

Stripper

with
needle

bearing
9
Rotor
shaft

Anti
backfire
A
B
valve

This
valve
is
actuated

by
intake

manifold
vacuum
to

prevent
backfire

in
the

exhaust

system
at
the

initial

period
of
deceleration

At

this

period
the
mixture
in
the

intake
manifold

becomes
too
rich
to

ignite
and
burn
in

the
combustion

chamber
and

burns

easily
in

the
ex

haust

system
with

injected
air

in
the

exhaust
manifold

The
A

B
valve

provides
air
to
the

intake
manifold
to

make
the
air

fuel

mixture

leaner
and

prevents
backfire

To
in
take

manifold

vacuum

EC069

Fig
EC

15
A
B
Valve
10
Ball

bearing

11
Front

bearing
cOYer

12

Pulley

13

Pulley

for
air
conditioner

Check
valve

A

check
valve
is

located
in
the

air

pump
discharge
lines
The
valve

pre

vents
the

backflow
of
exhaust

gas

which
occurs
in

the

following
cases

I

When
the
air

pump
drive
belt

fails

2
When

relief
valve

spring
fails

1

11
rom

pump

1

Spring

2
Rubber
valve

3

Seat
SecondarY
air

4
J
Exhaust

gas

EC322

Fig
EC

16
Check
Valve

Air

gallery

The

secondary
air

fed
from
the
air

pump
goes

through
the
check
valve
to

the

air

gallery
in
the

cylinder
head
It

EC
lt
14
Inlet

cavity

15

Outlet
cavity

EC066A

Fig
EC
14
Air

Pump
two
vane

lype

is
then

distributed
to

each
exhaust

port
and

injected
near
the

exhaust

valve

0

iJl

Ai

gallery

2

Exhaust

port

3
Exhaust

manifold

EC316

Fig
EC

17
Air

Gallery

Air
pump
relief
valve

Non
California

models

The
air

pump
relief

valve
controls

the

injection
of

secondary
air
into

the

exhaust

system
when
the

engine
is

running
at

high
speed
under
a

heavily

loaded

condition
It

accomplishes
the

Air
Induction
v
lve
filter

The
air
induction
valve
filter
is

installed
at
the
dust
side
of
the
air

cleaner
It

purifies
secondary
air

to
be

sent
to
the

exhaust
tube
The
fIlter

element
should
be

replaced
periodical

ly
in
accordance
with
the
Maintenance

Schedule

EC921

Fig
EC
54
Air
Induction
Valve

Filter

Antl
beckflre
v
lve
A
B
v
lve

Tltis
valve
is

controlled

by
intake

manifold
vacuum
to

prevent
backfire

in
the

exhaust
system
at
the
initial

period
of
deceleration

At
this

period
the
mixture
in

the

intake
manifold
becomes
too
rich
to

ignite
and
burn
in

the
combustion

chamber
and
burns

easily
in
the
ex

haust

system
with

injected
air
in
the

exhaust
manifold

The
anti

backfire
valve

provides
air

to
the
intake

manifold
to
make
the

air
fuel
mixture
leaner
and

prevents

backfire

If

the
valve
does
not
work

properly

unburned
ntixture
will
be

emitted

from

the
combustion
chambers
and

burns
with
the
aid
of

high
temperature

and

injected
air
which

causes
backfrre

To
intake

manifold

vacuum

To
intake

manifold

From
air

cleaner

EC069

Fig
EC
55
Anti

backfire
Value
Emission
Control

System

Air
Induction
Into
exhaust

port

The

secondary
air
fed
from
the
air

induction
valve

goes
through
the
check

valve
to
the
air

gallery
in

the

cylinder

head
It
is
then

distributed
to

each

exhaust

port
and

injected
near
the

exhaust
valve

I
Air

gallery

2
Exhaust

port

3
Exhaust
manifold

EC316

Fig
EC
56
Sectional
View

of

Exhaust
Port

REMOVAL
AND

INSTALLATION

Air
Induction
valve
and
filter

Remove
the
screws

securing
the

valve
and
filter
to
the
air

cleaner
body

The
air
induction
valve
and
valve
filter

can
then
be
taken

out

easily
Installa

tion
is
in
the
reverse

sequence
of

removal

EC922

Fig
EC
57

Removing
Air
Induction

Valve
and
Filter

EC
19
Air
Induction

pipe

Loosen
out
a

nut
securing
the

pipe

to

the

engine
cylinder
head
At
the

same
time
remove
the
screws

securing

the
bracket
and
rubber
hose

clamp

The
air
induction

pipe
can
then
be

taken
out
Installation
is
in
the
reverse

sequence
of
removal

Fig
EC
58

A
B
valve

The
A
B
valve
is
located
at
the

rear

side
of
the
air
cleaner
Remove

the
air

hoses
and
vacuum
tube

The
A
B
valve

can
then
be

taken

out
Installation
is
in
the

reverse
se

quence
of
removal

EC152A

Fig
EC
59

Removing
A
B
Valve

INSPECTION

Preliminary
Inspection

Check
hose
for
looseness

flatting

damage
or

faulty
connections
and

each

part
for

proper
installation
If

necessary

replace

Air
Induction
valve
and
filter

I
Disconnect
air
induction
hose
at

air
induction

pipe
side
Suck
or
blow

hose
to
make
sure
that
air

flows

only

on
the
air

induction

pipe
side

Emission
Control

System

EvApORATIVE

EMISSION
CONTROL
SYSTEM

DESCRIPTION
carbons
is

accomplished
by
activated

charcoals
in

the

C
Ibon
canister

This

system
is
made

up
of
the

foUo

ing
I

I
Fuel
tank
with

positive
sealing

filler

cap
The

evaporative
emission

control

system
is

used
to
reduce

hydrocarbons

emitted
to
the

atmosphere
from
the

fuel

system
This
reduction
of

hydro

6
C

2
Fuel
check
valve

3

Vapor
vent
line

4

Carbon
canister

I

5

Vacuum

ignalline

6

Canister

purge
line

5

1
Fuel
tank

2
Fuel
filler

cap
with

vacuum

relief
valve

3
Fuel
check
valve

4

Vapor
vent
line

5
Canister

purge
line

6
Vacuum

signal
line

7
Carbon
canister

EC327
A

Fig
EC
104

Evaporative
Emission
Control

System
for

Sed
n

EC
35
t

OPERATION

Fuel

vapors
from

the
sealed
fuel

tank
are
led
into
the
carbon
canister

The
canister

is
filled
with
activated

charcoals
to
absorb
the
fuel

vapors

when
the

engine
is

at
rest
or
at

idling

t

Fuel
tank

2

Fuel
filler

cap
with

vacuum

re1ief
va1ve

3
Fuel
check
vslve

4

Vapor
t
line

5
Vacuum

signal
line

6
Canister

purge
line
Emission
Control

System

As

the
throttle
Valve

opens
and
car

speed
increases
vacuum

pressure
in

the
vacuum

signajline
forces
the

purge

control

valve
to

open
and
admits
an

orifice
to

intake
manifold
and
fuel

vapor
is

then
drawn
into
the
intake

manifold

through
the
canister

purge

line

Fuel
vapor

7
Throttle
valve
IZ
Filter

8

Engine
13

Purge
control
valve

9
Carbon

cani5t
14

DiaphraP
spring

10
Activated
carbon
IS

Diaphngm

II
Screen
16
Fixed
orifice

EC785

Fig
EC
JOS

Evaporative
Emiuion
Control

System

Fuel

vapor
flow
when
ngine
is
at
rest
or

running

REMOVAL

AND

INSTALLAtiON

CARBON
CANISTER
FILTER

Check
for
a

contantinated

element

Elemenl
can
be
removed
at
the

bottom
of
canister

installed
on

car

body

EF201

Fig
EC
I06

Replacing
Carbon

Canilttr
Filter
CHECK
VALVE

The
check
valve
is

located
behind
the

luggage
compartment
board
on
the

fuel
tank

Remove

the

luggage

compartment

board
and
disconnect

the

vapor
tube

The
check

valve
can
then
be

taken

out

EC315A

Fig
EC
I07

Removing
Check

Volve

EC
36
INSPECTION

FUEL
TANK

AND

VAPOR
VENT
LINE

1

Check
all
hoses
and
fuel
tank

filler

cap

2

Disconnect
the

vapor
vent
line

connecting
carbon
canister
to

check

valve

3
Connect
a
3
w

y
connector

a

manometer
and
a

cock
or
an

equi

valent
3

way
charge
cock
to
the
end

of
the
vent
line

EC183A

Fig
EC
IOB

Vent
Line

4

Supply
fresh
air
into
the

vapor

vent
line

through
the
cock
little

by

little
until

pressure
becomes
368

mmHZO
14
5

inHZO

S
Shut
the
cock

completely
and

leave
it

unattended

6
After
2
5
minutes
measure
the

height
of
the

liquid
in

the
manometer

7

Variation
in

height
should
remain

with
25

mmHZO
0
98

inH20

8
When
filler

cap
does
not
close

completely
the

height
should

drop
to

zero
in

a
short
time

9
If
the

height
does
not

drop
to

zero
in

a
short
time
when
ruler

cap
is

d
it
is

the
cause
of

a

stuffy

hose

Note

In
case
the
vent
line
is

stuffy

the

breathing
in
fuel
tank
is
not

thoroughly
IIIIIde
thus

causing
in

sufficient

delivery
of
feul
to

engine

or

vapor
lock
It

must
therefore
be

repaired
or

replaced

3
way
connector

ck

Air

@
Manometer

Carbon
canister
Emission
Control

System

400
mmH20
15
75

inH20

Check
valve

Fuel

filler
cap

r

EC091A

Fig
EC
I09

Checking
Evaporative
Emiuion
Control

Syatem

FUEL
CHECK
VALVE

I
Blow
air

through
connector
on

fuel
tank
side

A

considerable
resistance

should
be

felt
at
the
mouth
and
a

portion
of
air

flow
be
directed
toward
the

engine

2
Blow
air

through
connector
on

engine
side

Air
flow
should
be

smoothly
direct

ed
toward
fuel
tank

3
If
fuel
check
valve

is

suspected
of

not

being

properly
functioning
in

steps

I

and
2
above

replace

Engine
side
Fuel
tank

side

Q

Evaporative
fuel
flow

Fresh
air

flow

EC090A

Fig
EC
110

Checking
Fuel
Check

Valve
CARBON
CANISTER
PURGE

CONTROL
VALVE

Check
for
fuel

vapor
leakage
in
the

distributor

vacuum
line

at

diaphragm

of
carbon
canister

purge
control
valve

To
check
for

leakage

proceed
as

follows

I
Disconnect
rubber
hose
in
the

line
between
T

connector
and
carbon

canister
at
T
connector

2

Inhale
air
into

the

opening
of

rubber
hose

running
to
vacuum
hole
in

carbon
canister

and
ensure
that
there

is

no
leak

ET349

Fig
EC
lll

Checking
Carbon
Canister

Purge
Control
Valve

EC37
3
If
there
is
a
leak
remove

top

cover
from

purge
control
valve
and

check
for
dislocated
or
cracked
dia

phragm
If

necessary
replace
dia

phragrrt
kit
which
is
made

up
of
a

retainer

diaphragm
and

spring

i

ii

1
Cover

2

Diaphragm

3
Retainer

4

Diaphragm
spring

ET350

Fig
EC
112

Carbon
Canister

Purge

Control
Valve

FUEL
TANK
VACUUM

RELIEF
VALVE

Remove
fuel
filler

cap
and
see
it

functions

properly

I

Wipe
clean
valve

housing
and
have

it
in

your
mouth

2
Inhale
air
A

slight
resistance

ac

companied
by
valve
indicates
that

valve
is
in

good
mechanical
condition

Note
also
that

by
further
inhaling
air

the
resistance
should
be

disappeared

with
valve
clicks

3
If
valve
is

clogged
or
if

no
resist

ance
is

felt

replace
cap
as
an
assem

bled
unit

O

ET500

Fig
EC

1l3
Fuel
Filler

Cap

INSPECTION
TABLE

I

No

spark
occur

Check

high
tension
cable

NG
OK

Repair
and

lor
replace
ngine
Electrical

System

START

Check

sparking
performance

J
J
Sparks
oci
1u

IC

IGNITION
SYSTEM
OK

Check
power
supply
circuit

NG

Repair
and
or

replace
OK

Check

primary
circuit
Proceed
to

A

Proceed
to
A
NG

epair
an
or

replace
OK

Proceed
to
A
DISTRIBUTOR
ASSEMBLY
NG

lC
IGNITION
UNIT
AND
OR

PICK
UP

COIL
NG

Mealure

pick
up
coil
resistance

as
a

distributor
assembly

Except
approx
4000

Measure

igilition
coii

8terminalvoltage

Battery
voltage

t
OV

Measure

pick
up
coil
resistance

I
Ie
IGNITION
UNIT
NG

Except
approx
400n

Approx
400n

PICK
UP
COIL
NG

1
PICK

UP
COIL
OK
Replace

IC

IGNITION

Replace

I
UNI
NG

l
Meuure

pick
up
coil
resistance

Except
approx
4000
I

Check

sparking
performance

I
Replace

I

r
PICK
UP
COIL
NG

1

No

spark
occun

Sparks
occur

I
IC
IGNITION

flc
IGNITION
Proceed
to
A

Replace

UNIT
NG

i
UNIT
OK

Proceed
to
A

Replace

Proceed
to
A

CHECKING

PROCEDURE

Sparking
performance

check

L
Turn

ignition
switch
to

OFF

position

2
Disconnect
anti
dieseling
solenoid

valve
connector
to
cut
off

supply
of

fuel
to

engine

3

Disconnect

high
tension
cable

from

spark
plug

4

Keeping
high
tension

cable
end
4

to
5

mm
0

16
to
0
20
in

away
from

engine
block
rotate
starter
motor
and

check
whether
sparks
occur
across
the

clearance
JUDGMENT

Sparks
occur

IC

ignition
system
OK

In

this
case
IC

ignition
system
and

component
parts
need

not
be
checked

beyond
this

No

spark
occurs

IC

ignition
system
NG

In
case
of
NG
check

High
Tension

Cables

Nole

This
check
is

designed
to

deter

mine

only
ignition

spark
perform

ance
when

cranking

engine
If

test

results
are

satisfactory
Ibis
does

EE

26
I

Approx
400n

PICK
UP
COIL
OK

1C
IGNITION

UNIT
NG

I
Repair
and
or

replace

I
Proceed
to
A

Approx
400n

l
PICK
UP

COIL
OK

1

not

alwaY
indicate

performance

sufrlcienl
for

high
speed

operation

IOgh
tension

cable
check

Refer
to

Engine
Tune

up
for
Check

ing
Ignition
Wiring
Distributor

Cap

and
Rotor

JUDGMENT

If

high
tension

cable
is
OK
check

Power

SupplY
Circuit

If

high
tension
cable
is
NG

replace

cable

assembly