Mazda 121 - Injection Body Inspection; Fuel Pressure Release; Fast-Idle

F
INTAKE
AIF
SYSTEI'
Fuel Pressure
Releaae
Belore
disconnecting
any
luel hne,
release
the
fuel
pressure
trom the
tuel
svstem
lo reduce
the
possibility
of
Injury
or
fire.
|.
Slad
the en-gine.
2. Remove
the rear
seat cushton.
3.
Disconnect the
fuel
pump
connector'
4. After
the enoine
stalls,
turn ofi
the ignition
switch
5. Reconnect
the luel
pump
connector
and installthe
rear seat
cush|on.
INJECTION
BODY
Inspeclion
1. Check
the
iniection body
lol
wear and deposils
2. Verify
that the throttle
valve
moves
smoothly
with the throt'
tle
valve lever
from fully
closed
to fully open.
Fastldle
(On-vehicle
Inspection)
1. Turn all electric
loads
OFF.
.
Blower
fan
.
Headlight
.
Rear
window delroster
2. Verify that
the wax
rod is contracted
and
that the
fast idle
cam as
in contact
with the
roller.
3. Connect a
tachometer.
4.
Start
the engine
and
verify thatthe
engine
speed
is below
2,500
nm.
5. Warm up
the engine
1o normal
operating
temperature
and
verfy that
the engine
speeo
gradually decreases.
6. After
the engine
warms
Llp, verify that
the
wax rod extends
fullv and that the
cam separtes
from
the
roller.
7. Vdity that
the idle speed
is
within specification.
ldle speed:
MTX
(Neutral) 750
:53 rpm
ATX
(P
range)1,100
:1 rpm
Note
.
Air
bypass solenoid
valve
@
opens
lrom hsll
ryanhed
up condilion
to
wamed
up condition.
.
Waler tempelature
when cam
iust
separates
is
6l
:3"C
(142
1!l.R
@TX),
55
+
8oC
(l3l
+
46oF)
(ATD.
4-?-2:
F-A4
FUEL PUMP COVER
PUMP
CONNECTOF