MPI –
Troubleshooting
13-28
INSPECTION PROCEDURE 11
When the engine is cold, it stalls at idling. (Die out)
Probable cause
In such cases as the above, the cause is probably that the air/fuel mixture is inappropriate
when the engine is cold, or that the intake air volume is insufficient.
D
Malfunction of the ISC servo system
D
Malfunction of the throttle body
D
Malfunction of the injector system
D
Malfunction of the ignition system
Were the battery terminals disconnected recently?
Yes
After warming-up, let the engine run at idling for about 10 minutes.
No
MUT-
II
Self-Diag code
Are diagnosis codes displayed?
Yes
Refer to P.13-8, INSPECTION CHART FOR DIAGNOSIS CODES.
OK
Check the fuel pressure. (Refer to P.13-30.)*
OK
Check the ignition timing.
(Refer to GROUP 11 – Engine Adjustments.)*
NG
Check that the crank angle sensor and the timing belt cover are
installed properly.
OK
Check the following items.
D
Check the ignition coil, spark plugs, spark plug cables.
D
Check the compression pressure.
D
Check the engine oil viscosity.
OK
MUT-
II
Data list
26 Idle position switch (Refer to P.13-58.)
NG
Check the idle position switch system.
(Refer to P.13-38, INSPECTION PROCEDURE 26.)
OK
Check the injector for operation sound.
NG
Check the injector system. (Refer to P.13-15, INSPECTION PRO-
CEDURE FOR DIAGNOSIS CODE 41.)
Yes
Check the ISC servo for operation sound.
NG
Check the ISC servo system.
(Refer to P.13-44, INSPECTION PROCEDURE 33.)
No
Is engine-idling stable after the warming-up?
No
Check for unstable idling (Rough idling, hunting).
(Refer to P.13-25, INSPECTION PROCEDURE 8.)
No
Does the engine stall right after the accelerator pedal is released?
Yes
Clean the throttle valve
area.
Adjust the fixed SAS.
(Refer to P.13-30.)*
OK
MUT-
II
Data list
21 Engine coolant temperature sensor (Refer to P.13-57.)
NG
Check the engine coolant temperature sensor system.
(Refer to P.13-10, INSPECTION PROCEDURE FOR DIAGNOSIS
CODE 21.)
NOTE
*:
Refer to Workshop Manual for LANCER EVOLUTION-IV and EVOLUTION-V (Pub. No. S9806CNCP9).