Mitsubishi FUEL Manual page 61

INSPECTION PROCEDURE 18
Poor acceleration
Defective ignition system, abnormal air/fuel ratio, poor compression pressure, etc.
are suspected.
MUT-II Self-Diag code
Are diagnosis codes displayed?
Check the injectors for operation sound.
Check the ignition timing.
(Refer to GROUP 11A - On-vehicle Service.)
MUT-II Data list
26 Idle position switch (Refer to P.13A-75.)
MUT-II Data list
13 Intake air temperature sensor (Refer to P.13A-75.)
MUT-II Data list
25 Barometric pressure sensor (Refer to P.13A-75.)
MUT-II Data list
21 Engine coolant temperature sensor (Refer to P.13A-75.)
MUT-II Data list
14 Throttle position sensor (Refer to P.13A-75.)
MUT-II Actuator test
10 EGR control solenoid valve (Refer to P.13A-80.)
MUT-II Data list
59 Oxygen sensor (rear)
D Transmission: 2nd gear <M/T>, L range <A/T>
D Driving with throttle widely open
OK: 600 - 1,000 mV
MUT-II Data list
11 Oxygen sensor
OK: Changes between 600 - 1,000 mV during sudden racing
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MPI <4G6> -
No
OK
OK
OK
OK
OK
OK
OK
OK
OK
Troubleshooting
Probable cause
D Malfunction of the ignition system
D Malfunction of air/fuel ratio control system
D Malfunction of the fuel supply system
D Poor compression pressure
D Clogged exhaust system
Yes
Refer to P.13A-8, INSPECTION CHART FOR DIAGNOSIS
CODES.
NG
Check the injector system. (Refer to P.13A-28, INSPECTION PRO-
CEDURE FOR DIAGNOSIS CODE P0201, P0202, P0203, P0204.)
NG
Check that the crank angle sensor is installed properly.
NG
Check the idle position switch system.
(Refer toP.13A-41, INSPECTIONPROCEDURE FORDIAGNOSIS
CODE P0510.)
NG
Check the intake airtemperaturesensor system.(Refer toP.13A-14,
INSPECTION PROCEDURE FOR DIAGNOSIS CODE P0110.)
NG
Check the barometric pressure sensor system. (Refer to P.13A-12,
INSPECTION PROCEDURE FOR DIAGNOSIS CODE P0105.)
NG
Check the engine coolant temperature sensor system.
(Refer toP.13A-16, INSPECTIONPROCEDURE FORDIAGNOSIS
CODE P0115.)
NG
Check the throttle position sensor system. (Refer to P.13A-18, IN-
SPECTION PROCEDURE FOR DIAGNOSIS CODE P0120.)
NG
Check the EGR control solenoid valve system.
(Refer toP.13A-36, INSPECTIONPROCEDURE FORDIAGNOSIS
CODE P0403.)
NG
Check the oxygen sensor (rear) system. (Refer to P.13A-24, IN-
SPECTION PROCEDURE FOR DIAGNOSIS CODE P0136.)
NG
Check the oxygen sensor (front) system. (Refer to P.13A-21, IN-
SPECTION PROCEDURE FOR DIAGNOSIS CODE P0130.)
13A-61