Mazda 121 - Poor Acceleration

F
TROUBLESHOOTING
GUIDE
20
POOR ACCELEFATION
DESCRIP-
|
.
Pe''omance
poor
whle acceleratng
Tlolil |
.ldle
condilion
nomd
FROUBLESHOOTING
HlllTSl
O
Factors olher
than engine
malfrJnction
.Clutch
slipping
.ATX
stippinS
.
Brake draggrng
.LOW
nrc
pressufe
.lncoffed
nre sze
@
Low
intake aif amount
.Throltle
valve not
open lully
.Cloggins
in intake arr system
@
An/Fuel
mixture
loo lean
.
Fuel
line
pressure
decreas€s
.
Fuel
injection
malf uncl|on
@
Poor
ignilion
@
Low
ensine compreseon
@Alcohol
blended
iuel us€d
INSPECTION
ACTION
'I
check
factoG other than
enorne
.
Clutch slippins
e
P.ge
H-3
.
Brake drassins
G
page
P-5
.
Low fte
pressurc
s
Page
o-2
.
lncor€ct tirc
sze
3
Page
O-2
.
ATX slipplng
-F
page
K-10
2 Does throttle
valve tully
open wtren cleprcssng
Go to
n€)d step
No Check
il accelefator
cable
ls coreclly
ndaled
F
page F-86
r+
lf oK,
check
throtlle valve
+
li nol
OK, install accelerator
cable
conecily
t7
Page
F-E6
3 is
'00'
displayed
on Self-Diagnosis Checker
with
lgnition switch
ON?
!7
Page
F-67
SYS'IEM
sELEcTi
1
TEST Swi SELF
TEST
Go
lo nexl step
llallunctlon
Code l{o. dlsPlayed
Cheok
lor cause
{Reter
to specifed
check
sequence)
e
Page
F-70
"88"
llash€s
Check
ECIJ terminal
1F voltage
t7
page
F-114
voltage
Appror.
12v
(bnirion
swilch
ON)
4
ll OK, replace
ECU
-Page
F-112
4
ll
nol OK, check
winnS
belween
ECU
and Sell-Dlagnosis
Checker
Connect
System Selector
to dlagnosis
conn€ctor
and set
Test Swilch
to SELF
TEST
'
ls ignlton
limlng correcl
al ldle alter warm_up?
!?
Page
F-62
lgnltion liming:
ETDC 16
+
l'
\\ \\.-\\ \\.igA'f
\<\to\\\l\tll
\ -"-
-'
Does
ignition timing
advance
when
+
It advances,
go
to nexl
st€P
+
ll
not advance,
check ECU
lermi'
nal
voltages
tr7
Page
F-112
\M
-"fi"
INOICATOF--/
5
Are ECU
lermlnal
voltages OK?
{Especially
2M)
tr7
Pago
F
112
'Check
Jor
cause
t7
Page
F-115
F-l17
F-lt9
F-50