Mazda 121 - Rough Idle;Engine Stalls Just after Starting

F
TROUBLESHOOTING
GUIDE
l2
NOUGH IDLE,/ENGIIIE
STALLS
JUST
AFTEB STATIING
DESC-RtP-
Trotl
.Enstr€
stans
normally but vibrates
excessively or
slalls
j0st
atler
starting
(acceleralion
tlom idle)
.ldle
conditons
ar€ normal in olher
conditons
TTBoUBLESHOOTING
Hll{TSl
O
Air/Fuel ml{ure
loo lean
.Fuel
injeclion control
malfunction
.
Low
luel line
pressure
@
Throltle sensor
mailur'ction
}TE'
tNSPECT|OI{
ACTION
ls OO" displayed
on Self-Diagnoss
Checker
with ionition swilch
ON?
-
c?
page
F-67
SYSTEM SELECT:
1
No
lr.ltunctlon
Code No. d|sPlayed
Check
lor cause
{Refer
to specilied
check
s€ouence)
c7
PzEe
F-7O
"88"
tlash€5
Check
ECU
ierminal lF vollage
ca
p.go
F-114
Volt.ge:
Approx.
12v
(lgnitlon
3witch
ON)
+
It OK,
redace ECU
c?
Page
F-112
+
ll nol OK,
check wirlng
between
ECU and
S€lf-Diagnosis
Checker
2
ls
there
air leakage
of intak€ air system com_
No
3
ls tuel Ine
prescure
conect al
idle?
e
page
F-94
295-275
kPa
12.4-2.a
kg,fcmu, 3l-40
psl)
Checi
for
fuel Ine
pressure
while
pinching
tuel
felum hose
+
ll
fuel line
pressu.e quickly in_
creases,
check
pressure
regulaior
+
ll fuel
line
pressurc
gradually In-
creases,
ch€ck for cLogging
be
Meen
luel
pump
and
pressure
r€gulator
lf
not clogged, check
luel
PumP
max
mum
p€ssure
.?
Page
F-91
Hlgh
pre33t|re
ls
fuel line clogged?
+
ll OK, replace
pressure
regulalor
rj'
Page
F-S4
+
lf not OK,
rcplace
Connect
Syslem Seleclor
!o dlagnosi
and set
Test Switch to
'SELF
TEST"
ls
ignltion timing correcl
al idle aiter
,TEN
f::
GND
(
\tg-aINOICATOFI
go
F--{
t3
In same
condilion
as StsP 3
in_
specIon
Check
'o'
conecl
idle
speed
.?
pag€
F-63
ldle speed:
750
'l
rPtn
(tilTx)
1,t00
'1lpm
(ATX)
4
ll OK,
go
io nexl step
+
ll not OK,
adjust
idle
speed
17
page
F-63
Ll
]/
TES
6
F-36