1979 DATSUN 210 fuel filter

Engine
Fuel

S
Idle

compensator
is
ill

good
order

if
a

hissing
sound
is

heard
when
its

temperature
reaches

operating
tern

perature

If
not

replace
idle

compensator
ldlerompensator
l
b
l

r
I

No
1
60
to
700C

140
to
15

Of

No
2
70

to
800C

158
to
1760F

FUEL
FILTER

DESCRIPTION

t
t

I

J
i

l
The
fuel
filter
is
a

cartridge
type
It

useS
a

paper
element

1
Body

2

Paper
element

3
Cover
EFOOS

Fig
EF

14
Sectional
View
of
Cartridge

Type
FuelFilte

FUEL
PUMP

t

j
f

EC132

Fig
EF
15
Schematic
View

of
Fuel

Pump

EF
6
OPERATING
TEST

Note
When

disconnecting
fuel
hoses

me
a

container
to
receive
fuel

remaining
in
fuel
hoses

STATIC
PRESSURE
TEST

The
static

pressure
test
should
be

conducted

as
follows

I
Disconnect
fuel
hose

between
car

buretor
and
fuel

pump

2
Connect
a
rubber
hose
to
each

open
end
of
aT
connector
and
con

nect
this
connector
hose

assembly
be

tween
carburetor
and
fuel

pump

Note
Locate
this
T
eonnector

as

close
to
carburetor
as

possible

3

Connect
a
suitable

pressure
gauge

to

the

opening
of

T
connector
and

fasten
the
hose
between
carburetor

and
T

connector

secUrely
with
a

clip

4
Start
and
run
the

engine
at

various

speeds

I

Secondary
slow
air

bleed

2

Secondary
main
air
bleed

3

Secondary
main
nozzle

4

Primary
main
nozzle

5

Primary
main

air
bleed

6

Primary
slow
air
bleed

7

Primary
slow

jet

8

Primary
main

jet

9
Idle
nozzle

10
Primary
throttle
valve

II

Auxiliary
valve

12
Seco
dary
throttle
valve

13

Secondary
main

jet

14

Counterweight

IS

Secondary
slow

jet

EF419A

Fig
EF
24
At
Full

Open
High
Speed
Engine
Fuel

Secondary
slow

system

Step
system

The
construction
of
this

system

corresponds
to

the

idling
and
slow

system
of
the

primary
system

This

system
aims

at
the

power

filling
up
of
the

gap
when

fuel

supply

is
transferred
from

the

primary
system

to
the

secondary
system
The

stepport

is
located

near
the

auxiliary
valve
in
its

fully
closed
state

ANTI

DIESELING
SYSTEM

The

carburetor
is

equipped
with
an

anti
liese1i

lg
solenoid

valye

As
the

ignition
switch
is

turned
off

the
valve
is

brought
into

operation

shutting
off
the

supply
of

fuel
to

the

slow
circuit

The

following
figure
shows
a
see

tional
view

of
this

control

An

ti
dies

eling
solenoid
valve

Ignition
switch
OFF

ON

t

L
li

FLOAT
SYSTEM

There
is

only
one
float
chamber

while
two
carburetor

systems

primary

and

secondary
are

provided

Fuel
fed
from
the
fuel

pump
flows

through
the
filter
and
needle
valve
into

the
float

chamber
A
constant
fuel

level
is
maintained

by
the

float
and

needle
valve

Because
of

the
inner
air

vent

type

float

chamber
ventilation
fuel
con

sumption
is

not
affected

by
dirt
ac

cumulated
in

the
air
cleaner
Ignition
switch

Q

1

T
Battery

niT

EC
3

Fig
EF
25

Anti
dieseling
Solenoid
Valve

The
needle
valve
includes

special

hard

steel
ball
and
wiD

not
wear
for
all

its

considerably

long
use

Besides
the
insertion
of

a

spring

will

prevent
the

flooding
at

rough
road

running

THROTTLE
OPENER

CONTROL
SYSTEM

T
O
C
S

Except
FU

model

The
function

of
the
throttle

opener

is
to

open
the

throttle
valve
of
the

carburetor

slightly
while
the
car
is
in

EF
10
deceleration

During
deceleration

the

manifold
vacuum
rises
and

the

quan

tity
of
mixture
in
the

engine
is

not

suffICient
for
normal

combustion
to

continue

4
consequently
a

great

amount
of

unburned
HC
is
emitted

Carburetors

equipped
with

the

throttle

opener
supply
the

engine
with

an

adequate
charge
of

combustible

mixture
to
maintain

proper
combus

tion

during
deceleration

resulting
in
a

dramatic
reduction
in
HC

emission

The

system
for
the

manual
trans

mission
model
consists
of

servo
dia

phragm
vlicuum

control
valve
throttle

opener
solenoid
valve

spee
l

detecting

switch
and

amplifier
On

the
auto

matic

transmission
model
an
inhibitor

and
inhibitor

relay
are
used
in

place
of

speed

detecting
switch
and

amplifier

on
the
manual
transmission

model
An

altitude

corrector
fitted
to
vacuum

control
valve

serves
to

automatically

regulate
the

operating
pressure
in

the

system
with

variation
of

atmospheric

pressure

T
o
C
S
n

operatIon

At
the

moment

when
the

manifold

vacuum
increases
as

occurs

upon
de

celeration

the
vacuum

control
valve

opens
to
transfer

the
manifold

vacuum

to
the
servo

diaphragm
chamber
and

the
throttle
valve
of
the

carburetor

opens

slightly

Under
this

condition
a

proper

amount

of
fresh
air

is
sucked

into
the

combustion
chamber
As
the
result

complete
combustion
of
fuel
is

as

sisted

by
this
additional
air

and
the

amount

of
H
C

contained
in

exhaust

gases
is

dramatically
reduced

Throttle

Clpener
sol
nold

valve

operation

Manual

transmission
models

The
throttle

opener
solenoid
valve

is
controlled

by
a

speed

detecting

switch
which
is

actuated

by
the

speed

ometer
needle

As
the

car

sp
ed
falls
below
16

km
h
10
MPH

this
switch
is
acti

vated

producing
a

signal

The

signal
is

led
to
the

amplifier
so

that
the

signal
can
be

amplified
to

a

degree

large
enough
to
actuate
the

CLEANING
AND
INSPECTION

Dirt

gum
water
or
carbon
con

tamination
in
or
on
exterior

moving

parts
of
a
carburetor
are
often

respon

sible
for

unsatisfactory
performance

For
this

reason
efficient
carhuretion

depends
upon
careful
cleaning
and

inspection
while

servicing

Blow
all

passages
and

castings

with

compressed
air
and
blow
off
all

parts
until

dry

Note
Do
not

pass
drills
or
wires

through
calibrated

jets
or

passages

as
this

may

enlarge
orifice
and

seriously
affect
carburetor
calibra

tion

2
Check
all

parts
for
wear
If
wear

is
noted

damaged
parts
must
be
re

placed
Note

especially
the

following

I
Check
float
needle
and
seat
for

wear
If
wear
is

noted
assembly
must

be

replaced

2
Check
throttle
and
choke
shaft

bores
in
throttle
chamber
and
choke

chamber
for
wear
or
out
of
roundness

3

Inspect
idle

adjusting
needle
for

hurrs
or

ridges
Such
a
condition
re

quires
replacement
Engine
Fuel

3

Inspect
gaskets
to
see
if

they

appear
hard
or

brittle
or
if

edges
are

torn
or

distorted
If

any
such

condi

tion
is
noted

they
must
be

replaced

4

Check

filter
screen

for
dirt
or
lint

Clean

and
if
screen
is

distorted
or

remains

plugged
replace

5

Check

linkage
for

operating

condition

6

Inspect
operation
of

accelerating

pump
Pour
fuel
into
float
chamber

and
make
throttle
lever

operate
Check

condition
of
fuel

injection
from
the

accelerating
nome

7
Push

connecting
rod
of
dia

phragm
chamber
and

block

passage
of

vacuum
with
finger
When

connecting

rod
becomes
free
check
for
leakage
of

air
or

damage
to
diaphragm

Jets

Carburetor
performance
depend

on

jets
and
air
bleeds
That
is

why

these

components
must
be
fabricated

with
utmost
care
To

clean
them
use

cleaning
solvent
and

blow
air

on
them

Larger
inner
nwnbers

stamped
on
the

EF

29
jets
indicate

larger
diameters
Ac

cordingIy
main
and
slow

jets
with

larger
numbers

provide
richer
mixture

the
smaller
numbers
the
leaner
mix

ture

Conversely
the
main

and
slow
air

bleeds

through
which
air

to

passes

make
the
fuel

leaner
if

they
bear

larger

numbers
the
smaller

numbers
the

richer
fuel

Assembly

To
assemble
reverse

the
disassem

bly

procedure
taking
care
to
the

following

I
Thoroughly
wash
all
the

parts

before

assembling

2

Inspect
gaskets
to

see
if

they

appear
hard
or
brittle
or
if

edges
are

torn
or
distorted

If

any
of
such
undesirable
condi

tions
is

noted

they
must
be

replaced

3
Install

jet
and
air

bleed

having
the

Same
size

number
as
that
of

original

one

4

After
reassembling
carburetor

check
each

rotating
portion
or

sliding

portion
for
smooth

operation

Engine

fuel

TROUBLE

DIAGNOSES
AND

CORRECTIONS

In
the

following
table
the

symp

toms
and
causes
of
carburetor
troubles
and
remedies
for
them
are
listed
to

facilitate

quick
repairs

There
are
various

causes
of

engine

malfunctions

It
sometimes

happens

that
a

carburetor
which
has
no
fault

appears
to
have

some

problems
when

Condition
Probable

cause

Overflow

Dirt
accumulated
on
needle
valve

Fuel

pump
pressure
too

high

Needle
valve

improperly
seated

Excessive
fuel

consumption
Fuel
overflow

Slow

jet
too

large
on
each
main

jet

Main
air

bleed

clogged

Choke
valve
does

not

open
fully

Outlet

valve
seat
of

accelerator

pump

improper

Unked

opening
of

secondary
throttle
valve

opens
ioo

early

Power

shortage
Mainjels
clogged

Every
throttle
valve
Joes

not

open

fully

Idling
adjustment
incorrect

Fuel
filter

clo
ll
ed

Vacuum

jet
clogged

Air
cleaner

clogged

Diaphragm
damaged

Power
valve

operating
improperly

Improper
idling
Slow

jet

clogged

Every
throttle
valve

does
not
close

Secondary
throttle
valve

operating
im

properly

Throttle
valve
shafts
wom

Packing
between

manifold
carburetor

faulty

Manifold
carburetor

tightening

improper

Fuel
overflow

T

O
C
S

adjustment
incorrect

Vacuum
control
solenoid

damaged

Stuck
dash

pot

EF
30
acfuaJIy
theelectric

syslem
i
at
fatilt

Therefore

whenever
the

engine
is
mal

functioning
the

electrical

system

should
be
checked

fust
before

adjust

ing
carburetor

Corrective

action

Clean
needle
valve

Repair
pump

Replace

See
above

item

Replace

Clean

Adjust

Lap

Adjust

Clean

Adjust

Repair

Repair

Clean

Clean

Replace

Adjust

Clean

Adjust

Overhaul

and
clean

Replace

Replace

packing

Correct

tightening

See
the
first

item

Adjust

Replace

Replace

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

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

Engine
Control
Fuel
Exhaust

Systems

REMOVAL

WARNING

When

replacing
fuel
line

parts
be

sure
to
observe
the

following

a
Put
a
CAUTION
INFLAM

MABLE

sign
in

workshop

b
Be

sure
to
furnish

workshop

with
In

asphyxiator

c
Be
sure
to
disconnect

battery

ground
cable
before

conducting

operations

d
Put
drained
fuel
in
an

explosion

proof
container
and

put
on
lid

securely

FUEL
TANK

Sedan

I

Disconnect
battery
ground
cable

2
Drain
fuel
from
fuel
tank

then

disconnect
fuel
hose

3
Remove

filler
hose

protector

and

inspection
cover
in

luggage
com

i
tl

f

I

Filler
hose

protector

2

Inspection
cover

FE561

Fig
FE
4

Removing
Filler
Hose

Protector
and
Inspection

Cover

4
Disconnect
fuel
filler
hose

vent

hoses
and
fuel
tank

gauge
unit
wire

connector

I

JI

I

2
FE562

3

Fig
FE

5
Di

connecting
Ho
e
and

Connector
5
Remove
fuel
tank

protector

6
Remove
fuel
tank

Hatchback
and

Wagon

I
Disconnect

battery

ground
cable

2
Drain

fuel
from
fuel
tank

then

disconnect
fuel
hose

3

Remove

luggage
carpet
luggage

board

inspection

covef
and
side
finish

er

4
Disconnect
fuel
filler
hose

vent

hoses
and
fuel
tank

gauge
unit
wire

connector
See

Fig
FE

5

5
Remove

fuel
tank

protector

6
Remove
fuel
tank

FUEL
TANK
GAUGE
UNIT

Sedan

1
Remove

inspection
cover
in

lug

gage
compartment
See

Fig
FE
3

2

Disconnect
fuel
tank

gauge
unit

wire
connector

3
Remove
fuel
tank

gauge
unit

Hatchback
and

Wagon

I
Remove

luggage
carpet
luggage

board
and

inspection
cover

2

Disconnect
fuel
tank

gauge
unit

wire

connector

3
Remove
fuel
tank

gauge
unit

CHECK
VALVE

Sedan

I
Remove

inspection
cover
and
fuel

filler
hose

protector
in

luggage
com

partment

2
Remove
check
valve

Hatchback

I
Remove

luggage
carpet
luggage

board
and

luggage
side
finisher

2
Remove
check
valve

Wagon

I
Remove

rear
side
finisher
in

luggage
compartment

2
Remove
check
valve

FE
5
FUEL
TUBE

Fuel
tubes
are
serviced

as
an
assem

bly
so
that
the

replacement
of
fuel

tube

can
be

easily
done
However

do

not
disconnect

any
fuel
line
unless

absolutely
necessary

Drain

fuel
from
fuel
tank

2

Loosen
fuel
hose

clamps
and
dis

connect
fuel
tube

at
each
end

Note

Plug
hose
and
tube

openings
to

prevent
entry
of
dust
or
dirt
while

removing

3
Unfasten

clips
that

hold
tube
on

underbody
and

remove
tube

from
the

car

FUEL

FILTER

I
Disconnect
fuel
hoses
from
fuel

filter

by

removing
clamps

2

Take
out
fuel
strainer
and
discard

it

INSPECTION

FUEL
TANK

Check
fuel
tank
for

cracks
or
defor

mation

If

necessary
replace

FUEL
HOSE

Inspect
all
hoses
for
cracks

fatigue

sweating
or
deterioration

Replace
any
hose
that
is

damaged

FUEL
TUBE

Replace
any
fuel
tube
that

is
crack

ed
rusted

collapsed
or
deformed

FUEL
FILTER

Replace
fuel
filter
at
the

specified

maintenance
interval
or

if
it

becomes

clogged
or
restricted

Fuel
filter
is
of
a

cartridge
type
and

cannot
be
cleaned

Always
replace

with

a
new
one

CHECK
VALVE

1
Blow
air

through
connector

on

fuel
tank
side

A
considerable
resistance
should
be

felt
at
the
mouth
and
a

portion
of
air