Daewoo MATIZ - Page 17

GENERAL ENGINE INFORMATION 1A–7
DAEWOO M-150 BL2
GENERAL DIAGNOSIS (Cont’d)
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Condition
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Probable cause
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Correction
Rough Engine Idling Malfunction of
Ignition System
D Loosening or damage of the
distributor rotor or cap.
D Replace the rotor or cap.
D Poor ignition timing. D Adjust the ignition timing.
D Malfunction of the ignition
coil.
D Replace the ignition coil.
Others
D Clogged or contaminated air
cleaner element.
D Clean or replace the air
cleaner element.
D Leak of the intake manifold
gasket.
D Replace the gasket.
D Malfunction of Positive
Crankcase Ventilation (PCV)
valve.
D Check the valve or replace it
if needed.
D Poor connection or damage
or leakage of the vacuum
hose.
D Connect the hose correctly
or replace it.
Engine Hesitate (Upon
pressing accelerating
pedal, the engine
Decline of
Compression
Pressure
D Refer to “Page 1A–5”. D Refer to “Page 1A–5”.
makes delayed
response. This
Malfunction of
D Poor ignition timing. D Adjust the ignition timing.
response. This
situation is remarkable
when cruising or
Ignition System
D Poor spark plug or poor
adjustment of the plug gap.
D Replace the plug or adjust
the gap.
starting.)
D Electric leakage or poor
connection of the high
tension cable.
D Connect the cable correctly
or replace it.
Others
D Malfunction of the air cleaner
system.
D Clean or replace the air
cleaner system.
D Leak of the intake manifold
gasket.
D Replace the gasket.
Engine Surging
(Engine power makes
fluctuation in a fixed
Decline of
Compression
Pressure
D Refer to “Page 1A–5”. D Refer to “Page 1A–5”.
speed and speed
changes without
Malfunction of
D Clogged fuel pipe. D Clean the pipe.
changes without
operating the
accelerating pedal.)
Fuel System
D Clogged or contaminated
fuel filter.
D Replace the filter.
D Malfunction of the fuel
pressure regulator.
D Replace the fuel pressure
regulator.
Malfunction of
Ignition System
D Malfunction of the spark
plug.
D Adjust or replace the spark
plug.
D Electric leakage or poor
connection of the high
tension cable.
D Connect the cable correctly
or replace it.
D Worn distributor cap terminal
or accumulated carbon in
the distributor cap.
D Clean or replace the
distributor cap.
D Loosening or damage of the
distributor rotor or the cap.
D Replace the distributor rotor
or the cap.
D Poor ignition timing. D Adjust the ignition timing.