Mitsubishi Eclipse 1990 Service Manual page 594

INSPECTION PROCEDURE 19
Surge
Defective ignition system, abnormal air-fuel
Are diagnostic trouble codes output
Check the injectors for op
(Refer to
OK
Check the ignition timing.
(Refer to GROUP On-vehicle Service.)
Check the
(Refer to GROUP On-vehicle Service.)
Scan Tool: Inspection when surge occurs.
(Refer to INSPECTION PROCEDURE 43.)
OK
Check the fuel pressure. (Refer to
OK
Check the following items.
Check the ignition coil, spark plugs, spark plug cables.
Check the EGR system.
Check the waste
INSPECTION PROCEDURE 20
Knocking
[Comment]
In cases such as the above, the cause is probably that the detonation control is defective or the
heat value of the spark plug is inappropriate.
Are diagnostic trouble codes output
NO
Does knocking occur when driving with the sensor
At this time, use the scan tool to check if the timing is
retarded compared to when the knock sensor connector
is connected.
YES
Check the following items.
Spark plugs heat range
Check if foreign materials (water, alcohol, etc.) got into fuel.
INSPECTION PROCEDURE 21
Dieseling
[Comment]
Fuel leakage from injectors is suspected.
Check the injectors for fuel leakage.
ENGINE (TURBO)
AND ENGINE>
are suspected.
YES
NG
Engine (Turbo)>
Engine>
actuator.
YES
NO
TSB Revision
Troubleshootina
Malfunction of
Malfunction of'
Malfunction of the EGR solenoid system
Refer to INSPECTION CHART FOR DIAGNOSTIC
TROUBLE CODES.
PROCEDURE FOR
Check that the crankshaft position sensor and
properly.
Probable cause
Defective knock sensor ,
Refer to INSPECTION CHART FOR' 'DIAGNOSTIC
TROUBLE CODES.
Check the knock sensor 1 circuit malfunction (Refer
INSPECTION PROCEDURE FOR
Probable
Fuel leakage from injectors
, .
ignition system
'ratio 'control system
,
.
TROUBLE
are
heat the
. .
CODE'
I