Mitsubishi FUEL Manual page 270

13I-76
INSPECTION PROCEDURE 9
When the engine is cold, it stalls at idling. (Die out)
The cause is probably an incorrect air/fuel ratio or poor intake air amount when the
engine is cold.
Have the battery terminals been disconnected recently?
MUT-II Self-Diag code
Is a diagnosis code displayed?
Is the engine idling correct after the engine has been warmed up?
MUT-II Data list
22 Crank angle sensor (Refer to P.13I-98.)
Check idling speed when the engine is cold.
MUT-II Data list
26 Accelerator pedal position switch (Refer to P.13I-98.)
MUT-II Data list
21 Engine coolant temperature sensor (Refer to P.13I-98.)
MUT-II Data list
68 EGR valve (Refer to P.13I-98.)
Does the engine stall immediately after the accelerator pedal is
released?
Measure fuel high pressure between the fuel pump (high pressure)
and injector. (Refer to P.13I-122.)
Check ignition timing. (Refer to GROUP 11D - Engine Adjustment.)
Check ignition coil spark for each cylinder.
(1) Remove the ignition coil.
(2) Install a new spark plug to the removed ignition coil.
(3) Disconnect the injector intermediate connector.
Caution
Never touch the connector terminal as approx. 100 V is
applied to the injector, or you are seriously injured.
(4) Earth the spark plug electrode securely.
(5) Check that the spark plug ignites when the engine is cranked.
Check all the following items:
D Spark plugs
D Compression pressure
D Engine oil viscosity
NOTE:
*: Refer to the '99 GALANT Workshop Manual (Pub. No. PWDE9611-A)
GDI -
No
No
No
OK
OK
OK
OK
No
OK
OK
OK
Troubleshooting
Probable cause
D Malfunction of the electronic-control throttle valve
system
D Malfunction of the throttle body
Yes
Warm up the engine, and then let it run at idle for approx. ten
minutes.
Yes
(Refer to P.13I-11, INSPECTION CHART FOR DIAGNOSIS
CODES.)
Yes
Refer to "Unstable idling (rough idle, hunting).
(Refer to P.13I-73, INSPECTION PROCEDURE 7.)
NG
Check the throttle valve position feedback system.
(Refer to P.13I-57, INSPECTION PROCEDURE FOR DIAGNOSIS
CODE P1221.)
NG
Check the accelerator position switch.
(Refer to P.13I-93, INSPECTION PROCEDURE 29.)
NG
Check the engine coolant temperature sensor. (Refer to P.13I-18,
INSPECTION PROCEDURE FOR DIAGNOSIS CODE P0115.)
NG
Check the EGR valve system. (Refer to P.13I-51, INSPECTION
PROCEDURE FOR DIAGNOSIS CODE P0403.)
Yes
Clean around the throttle valve. (Refer to P.13I-98*.)
NG
Repair
NG
Check that the crank angle sensor and timing belt cover are properly
installed.
NG
Replace the ignition coil.
OK
Check trouble symptom.
Replace the injector.
NG