Mazda 121 Workshop Manual page 204

F
TROUBLESHOOTING
GUIDE
;TEP
INSPECTION
acTtor,l
6
ls there air leakage oi intake air system com_
ls air cleaner elemenl clean?
s page F-62
Beplace ar cleaner elemenl
8
ls luel ine pressure corect at idle?
c7 pag€ F-94
zgs-zzi rpa (z.l-z.a rg/cm' , 34-40 psD
Does iue Ine pressure decrease
when accelef anng quickly
+
li decrcases, check tuel pump
maxlmum pressure
17 Page F-91
ll OK check fuel line and filtef ior
cloggrng
+ ll not decr€ase, So to ne)d slep
Check tuel line pressure while pinch
+
ll fuel line pfessurc quickly rn
creases, check pressure regulalor
+
lf luel line pressure gradually ln'
creases, check tor clogging be
iween iuel pump and pressure
lf not cLogged, check luel pump
maximum pressure F Page F-91
Hlgh prcssure
Check af tuel return line is clogged
+
ll oK, replace pressure regllalor t7 page F-95
4
li not OK, replace
I
Bemove air cleaneri s there any carbon depost
or drn In njecton bo4,r/ -
i -
r t
' { l - \ -
Clean
N o
1 0
Are spa.k plugs OK?
17 page G-19
WEAF AND CAFBON BUILDUP
(0.039 -0.044|
AURNS
DETERIOBATION
in)
F-48