Mazda 121 - Ignition Timing, Idle Speed

ENGINE
TUNE-UP
PROCEDURE
IGNITION
TIMING,
IDLE
SPEED
Prsparalion
1. Warm
up the engine
to
normal operating
temperature
2. Verity
that the
wax rod extends
outward
fully and the idle
cam separates
from the
roller'
3. Turn all electric
loads
OFF.
.
Blower
Fan
.
Headlight
.
Rear Window
Defroster
4. Make sLrre
that the
engine speed
does
not change
when
disconnecting
the air
bypass
solenoid
valve
@
connector'
5. ll the eleckic
cooling
fan
is operating,
waittillthe
lan stops
6. Verify that
the engine
is running
at
idle in
good
condition
7. Connect the
ssT to
the diagnosis
connector'
8. Connect a
tlming
light.
9. Connect a
tachoheter
to the diagnosis
connector
lG- ter-
minal as shown.
Note
.
ll the engine speed
decreases,
ths englne
la atlll un-
der
the warm-up
condition.
'10.
Set switch
@
to
position
1 .
1'1. Set
TEST SW to
SELF-TEST.
Note
.
It the SST
is not used,
iump
across
the TEN termi-
nal and the
GND ierminal
ol
the diagnoals
con-
nedor.
lgnition
Timing
Inspection
/ Adius|ment
1.
Check
lhat tne
idle speed
is wiihrn
the specification
ldle speed:
MTX
(Neutral) 750
i:!
rym
ATx
(P
range)
I,100
:1
rpm
2. Check the
ignition timing
with a
timing
light
lgnition timing:
BTDC
16
+
l"
3. lt the ionition
tr|nino
is not
within the specilication.
loosen
the disiflbutor locLbohs
and lurn
the distributor
to
make
the adiustment.
4. Tighte; the distributor
lock bofts to
the specified
torque
Tiohteninq torque:
is-zs-Nm
(i.9-2.6
m-ks,
14-19
ftlb)
5. Put a seal
on the
distributor
lock bolt.
A)
B-8