Daewoo MATIZ Service Manual page 17

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