Datsun 1980 200SX Service Manual page 27

Minor Trouble DiagnolJt
s
and Correctiom
MAINTE ANCE
Condition
Fuel
system
malfunction
Low
compression
Others
HIGH
ENGINE
IDLE SPEED
Fuel
system
malfunction
Others
ENGINE POWER
BELOW NORMAL
Low
compression
Ignition
system in
trouble
Fuel
system
malfunction
MA 18
Probable
cause
Damaged
electronic fuel injection harness
Seized injector Usten
to
operating
sound
Malfunctioning air regulator
During
warm
up
driving only
Damaged
control
unit
Damaged
water and air
temp
sensor
Malfunctioning
throttle valve
switch
Irregular fuel
pressure
Malfunctioning
P C
V
valve
Malfunctioning
E
G R control system
Incorrect
adjustment
of idle
speed adjusting
screw
Malfunctioning air
regulator
Throttle valve is opened
excessively at
idle
Malfunctioning
F I
C
D
Dragged accelerator
linkage
Malfunctioning
Vacuum Control Valve
V
C
V
Incorrect
ignition timing
Malfunctioning
spark
plugs
Malfunctioning
distributor pick
up
coil
Throttle valve does
not
open
fully
Damaged
electronic fuel
injection harness
Seized
injector
Usten
to
operating sound
Malfunctioning air
flow
meter
Malfunctioning
throttle valve
switch
Irregular
fuel pressure
Clogged
fuel
pipe
Dirty
or
clogged
fuel ftIter
Fuel
pwnp
will
not
work
properly
Corrective
action
Replace
Replace
Replace
For inspection
procedures
for
electronic fuel
injection
sys
tern
compo
nents
refer
to
Engine
Fuel
Section
Replace
Replace
Repair
or
replace
Replace
pressure
regulator
Previously
mentioned
Check
or
replace
COrrect
or
replace
Correct
Replace
For
inspection procedures for
air
regulator
refer
to
Engine Fuel section
Replace throttle chamber
Replace
Check and
correct
accelerator
linkage
Check
or
replace if necessary
Previously
mentioned
Adjust
Clean adjust
or
replace
plugs
Replace
Adjust
Replace
Replace
Replace
Repair
or
replace
Replace
pressure
regulator
if
necessary
Replace
if
necessary
Replace
Replace
For
inspection
proce
dures for electronic
fuel injection system
components
refer
to
Engine Fuel Section