Mazda 121 - Cranks Normally but Hard to Start - Always

TROUBLESHOOTING GUIDE F
CRANKS NORMALLY BUT HARD
TO
START
-
ALWAYS
DESCRIP.
Ttol{
.Englne
cranks
al nomal speed but
req'rnes excessive cranklng llme
berore starling
.
Batlerv
ln norrna conclition
.Engine
runs
nomally at ldle
fll
idle
condllion not OK,
refer
to
"Bough
idle"
(Nos.
8 l2)l
FnoUBLESHOOTtfl
G HTNTSI
O
Air/Fuel rnixture too
lean
.Fuel
injection control
malluncion
(Correclion
tor coolanl temperaiurd
.Low
luel lin€
pressure
@
Air/Fuel
m
nure ioo ich
.Fuel
injeclion control
malfunclion
(Correclion
lor
coolant temperalure)
.Calbon
deposil in
hot-wire
passaSe
@
Poo'
isnition spafk
tNSPECTtOl{
ACTIO
ls 00" dsplayed
on Selloiagnos's Checker
wth iqnition swilch
oN?
F
page
F-57
ma[unciion Code l{o, dlspl.yed
Check ior cause {Refer io soeciiied
check
sequence)
?
p.ge
F-70
"88"
tl.shes
Check ECU termlnal
1F voltage c7
page
F-114
Vo[.g€:
Appror. l2V
(lgnition
svritch O
)
+
lf OK, replace ECU
t:"
p.ge
F-172
4
ll nol OK, check wiring belween
ECU and Ssll-Diagnosis Checkef
2 ls there a r
leakage
ol intake air syslem com-
3
s ar cleaner element clsan?
-
page
F-62
No Repace air c eaner elemenl
Does engine sla( easlly
when lhrofle valve Ch€ck throtle
valve
tor carbon depos-
t and lhen
go
to Siep 6
5 ls
iuel Ine
prcs$rre
cofiecl al idle?
F
page
F-94
235-275
XPa
12.4-2.A
kg/cm" 34-40
psD
FUEL FILTER
Check luel
line
pressure
while
pinch-
+
ll fuel llne
pfessure quickly
in-
creases, check
pressure
regulalor
+
ll fuel llne
pressure gradually
in'
creases, check
for clogging
be-
lween tuel
pump
and
pressure
ll not
clogg€d, ch€ck
iuel
pump
maimum
prcssurc
F
page
F-91
F-23