Mitsubishi Eclipse 1990 Service Manual page 473

INSPECTION PROCEDURE 14
The engine stalls when decelerating.
[Comment]
In cases such as the above, the cause is probably that the intake air volume is insufficient due
to a defective idle air control motor system.
Were the battery terminals disconnected recently?
SCAN TOOL DTC
Are diagnostic trouble codes output?
OK
SCAN TOOL SENSOR
07 Throttle position (Refer to
NO
Check the following items.
Check the ignition coil, spark plugs, spark plug cables.
Check the throttle body minimum air flow.
INSPECTION PROCEDURE 15
Hesitation, sag or stumble
[Comment]
In cases such as the above, the cause is probably that ignition system, air/fuel mixture or
compression pressure is defective.
Are diagnostic trouble codes output
Check the injectors for op
(Refer to
Scan Tool: Inspection when hesitation, sag, stumble or poor
acceleration occur. (Refer to
PROCEDURE 34.)
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 compression pressure.
Check the fuel filter or fuel line for clogging.
ENGINE (NON-TURBO)>
YES
NG
NG
Check the injector control circuit.
INSPECTION
TSB Revision
Probable cause
Malfunction of the
After warming-up, let the engine run at idling for
Refer to INSPECTION
TROUBLE CODES.
Check the throttle position sensor circuit.
(Refer to INSPECTION PROCEDURE 43.)
Probable cause
Malfunction of the ignition
Malfunction of air-fuel ratio control
Malfunction of the fuel supply
P o o r
FOR DIAGNOSTIC TROUBLE CODES".
. .
. .
system
FOR
. .
of the EGR. solenoid
out procedures 20, 21,
in' INSPECTION PROCEDURE