Mazda 121 - Page 207

TROUBLESHOOTING
GUIDE
F
STEP
ITSPECTION ACTION
6 is lhere alr
leakage
al
inlake
ar system com-
7 ls there
any
carbon
deposit or did in injection
\
Clean
8
ls
lue line
pressure
cofiect at dle?
c7
page
F-94
235-275 kPa
12.4-2.a
kg/cmz, 34-40
psi)
Check I' luel line
pressure
decreases
when accel€ral ng
qulckly
+
ll decrease,
check
iuel
pump
rnaxmurn
pressure c?
page
F-91
ll OK,
ch€ck
llel line and iiter lor
clogg ng
..)
ll nol decrease,
go
lo
nexl step
Check
lor luel line
pressure
whle
pinchlng
luel return hose
4
lf luel line
prcs$re
quickly
n-
creases, check
pressure
r€gu alor
4
lf luel line
pressrfe
gradually
n-
creases, check
lor clogging be
tween
luel
pump
and
Pressure
ll nol clogged, check
l'rei
pump
ma-ximum
p.essure
c7
Page
F-91
Hagh
pressure
Check il tuel llne s clogged
+
ll OK rcplace
pressure
regu alor s
page
F-95
4
ll not OK, replace
I Ar€
spark
plugs
OK?
-.
page
c_lg
WEAF AND
CAFIBON BUILDUP
{0.039-O.0,*t
EUFNS
OETEFIOFATION
F-51