Mazda 121 - Pressure Regulator; Fuel Line Pressure

F
FUEL
SYSTEM
PRESSURE
REGULATOF
Irsp€ction
Fuel llne
pressure
WarninE
.
BebA oerforminq
the
lollowing
operatlon,
releaae
the
fuel'presaure
llom
the fuel system
to lsduce
the
possibllity
ot
Iniury
or tlre.
(Reter
lo
page
F-88.)
.
When
inipecting
the
pressure regulator'
keep
sparks, ciiaretl$,
and
open
llames
away
from it'
1. Disconneq
the
negatNe battery
cable
2. Connect
a fuel
Pressure
gauge.
3. Connect
the negative
battery
cable.
4. Start
the engine
and
run it at
idle
5.
Measure
the luel
line
Pressure.
Fuel line
Pressure:
235-2i5
kPa
(2.4-2.a
kglcm''
34-40
psi)
Noie
.
The tuel
line
pressurc wlll mt
change
when
remov-
Ing the
vacuum
hose
lrom
the
Plessule
regulator
at ldle.
nepbcement
Warning
.
Betoie oedormlng
the
following
operatlon,
lelease
the
fueipressure
from the
luel system
lo lsduce
ihe
possibllity
of iniury
or tire.
(Reler
to
page
F-88.)
.
iivhen
replaclng
tuel system
componenta'
keep
sparks,
cigareties,
and
open
flames
away
from the
lusl.
Cautlon
.
Aller removlng
the
air cleaner,
cover
lhe lntake
ah
pagsag€ with a ctean
rag to
Protect
the alrtlow
3enaor.
1. Remove
the air
cleaner.
2.
Disconnect
the
negative
battery
cable
3.
Remove the
pressure
regulator
as
shown
in the
figure
4. lnstall in
the reverse
order
ol removal
INJECTOR
Inspection
(On-vehlcle)
1. Remove
the air
cleaner
cover.
Caulion
.
Perform
the
tollowing
insPection
carelully
to
Pro-
tect
the alrflow
sensor
ttom
damage.
2. Start the
enoine
and
run it at
idle.
3.
Using asound
scope,
verify that
injector
operaling
sounds
are
nearo.
3.a--{.a
{35-50,
3O--a3)
OAING, FEPIACE
PRESSUFIE
FIEGULATOFI
vAcuuM
HosE
^ \
NJECTTON BOOY
F-94