1. General Information/Trouble Diagnosis
1-14
C. Engine runs sluggish (especially in low speed and idling)
D. Engine runs sluggish (High speed)
Check and adjustment
Fault condition
Probable causes
Check ignition timing
(using ignition lamp)
Check for fuel supplying
system in fuel pump
Check if fuel injector is
clogged
1. Incorrect ignition timing (malfunction of
ECU or AC alternator)
1. Heat insulation gasket to damage
2. Throttle valve lock loose
3. Intake gasket to damage
4. By-pass hose crack
1. Spark plug fouled
2. Malfunction of ECU
3. Malfunction of AC generator
4. Malfunction of ignition coil
5. Open or short circuit in spark plug
leads
6. Malfunction of main switch
1. Insufficient fuel in fuel tank
2. Fuel line clogged
3. Restricted fuel tank EEC line
Good
Poor
Good spark
Poor spark
No air sucked
Air sucked
Normal
Abnormal
Check If air sucked through
throttle valve gasket
Remove spark plug, install
spark plug into spark plug
cap and perform spark test
against engine ground
Check and adjustment
Fault condition
Probable causes
Check ignition timing
1. Malfunction of ECU
2. Malfunction of AC alternator
Normal
Abnormal
No clogged
Clogged
1. Replace fuel injector
