Mazda 121 Workshop Manual page 186

F
TROUBLESHOOTING
GUIDE
STEP
INSPECTION
ACTION
6
Connect Syslem Sel
ignition timing correr
lgnition tlming: BI
ector to diagnoss conn€ctor
to 'SELF'IEST"| is coffecl
ri at idle aiter walm up?
.7 page F-62
1 6
.- /fEN Adtust gniton timing
17 Page F_52
t ,
GNo
//
-tfi"
INOICATOF /
D tl.r9*
7
ls luel Ine oressure corrccl al idle?
c7 Page F-94
Fuel line pressure:
235-275 kPa 12.4-2.A rg/ctn', 34-40 psi)
{vacuum hos€ to pte*3ure regulstor dls-
connected)
., .ih,
(\
)
""'*Y"'-94u9:-lwlllK;/
-\-,aJ.6V.]Ly.V /
FUET FIITEF
Check fuel line ptessure while prnch_
+
ll fuel line pressure quickly in_
creases, check Pres$re regulalor
+
I fuel line prcssll|e sradually In_
creases, check lor clogging be
tween fue punrp and pressure
regulatot
It not clogged, check fuel PUmP
maximum pressure
I
Page F-91
I
ls thero an bakage ai intake air syslem com
9
ls eno ne cornpression
correcl?
-
e paEe B-10
Ensine compression (r !nimum):
t,o3o tPa Oo.5 kg/cm'. 149 Psi)-300 rPm
Try known good ECU and does con
Check lor cause
F Page B-lO
F-30