Mazda 121 - Cranks Normally but Hard to Start - after Warm-Up

TROUBLESHOOTING GUIDE F
CRAI{KS I{ORI{ALLY
zuT HARD TO START
-
AFTER WABi&UP
DESCRIP.
n0
.Engine
cranks at normal speed
but requires excessive cranking tme beiore stading aller
runnino
and
hol
.
Baitery in normal
condition
.
Engine starls
no|mally vlhen coLd
.Ensine
runs normally al idle
lll
idle condltion
nol OK, refer to Rough idle"
(Nos.
8-12)l
ITBOUALESHOOTING
HI
TSI
O
Ai/Fud rni(ure loo rich
.
Fuel inject on conlrol
malfunclion
.hieclor
luel leakage
@
Vapor lock
.Fuel
pressufe
not held in luel line after
engine
slopped
.HiSh
RVP
(wider)
fuel used in warm wealher
r{sPEcTtot{
acTrol{
1 ls
"00"
displayed on
S€llDiagnosis Checker
with igniiion switch ON?
NO allunc{lon
Code No. dlsplayed
Check
ior
cause Seler
to soectied
check s€quence)
c7
pag€
F-70
"88"
tlashas
Check
ECU rermlnal 1F voltage s
pag€
F-114
Voll.ge Approx. 12V
(lgnition
switch
oN)
=)
lf OK, r€place ECU
E'
pag€
F-112
+
lf not OK, ch€ck wiring belween
ECU and SellDiagnosis Ch€cker
2
Are ECU terminal voltages OK?
(Especlally
1C, 20, and 2T)
c7
Page
F-l12
Go
to next step
Check tor cause
F
pag€
F-115
F-|17
F-l19
3 Run engine al
idlei is luel lin6
prossure
is held
after
ignilion
switch
turned OFF?
.7
p.ge
F-88
Fu€t llne oreaaure:
More then 147 kPa
(t.5
kg/cmz, 21
psl)
tor
5
fiin.
NO Plug ou.tlel of
pressure
regllalor
and
check il Juel line
pressure
is held
afier
ignilion switch lurned OFF
.+
lf OK, replace
pressure
regulalor
17
page
F-94
+
lf nol OK, ch€ck luel
pump
hold
pressure .7
pago
F-88
lf luel
pump
is OK, ch€ck intector
lor iuel leak€ge
r?
page
F-96
F-27