Mitsubishi MOTORS Space Runner 1999 Workshop Manual Supplement page 514

INSPECTION PROCEDURE 13
The engine stalls when starting the car. (Pass out)
In cases such as the above, the cause is probably misfiring due to a weak spark,
or an inappropriate air/fuel mixture when the accelerator pedal is depressed.
MUT-II Self-Diag code
Are diagnosis codes displayed?
MUT-II Actuator test
10 EGR control solenoid valve (Refer to P.13B-52.)
Check the following items.
Check the ignition coil, spark plugs, spark plug cables. (Refer to GROUP 16 – On-vehicle Service.)
Check if air was drawn into the intake system.
Broken intake manifold gasket
Broken or disconnected vacuum hose
Improper operation of the PCV valve
Broken air intake hose
INSPECTION PROCEDURE 14
The engine stalls when decelerating.
In cases such as the above, the cause is probably that the intake air volume is
insufficient due to a defective idle speed control (ISC) servo system.
Were the battery terminals disconnected?
MUT-II Self-Diag code
Are diagnosis codes displayed?
MUT-II Data list
14 Throttle position sensor (Refer to P.13B-48.)
MUT-II Data list
45 ISC servo position
Is the idle speed control (ISC) servo position drops to 0 – 2
steps when decelerating (engine r/min less than 1,000)?
MUT-II Actuator test
10 EGR control solenoid valve (Refer to P.13B-52.)
Check the following items.
Check the ignition coil, spark plugs, spark plug cables. (Refer to GROUP 16 – On-vehicle Service.)
Clean the throttle valve area.
MPI –
No
OK
No
No
OK
No
OK
Troubleshooting
Probable cause
Drawing air into intake system
Malfunction of the ignition system
Yes
Refer to P.13B-9, INSPECTION CHART FOR DIAGNOSIS
CODES.
NG
Check the EGR control solenoid valve system.
(Refer to P.13B-47, INSPECTION PROCEDURE 34.)
Probable cause
Malfunction of the ISC system
Yes
After warming-up, let the engine run at idling for 10 minutes.
Yes
Refer to P.13B-9, INSPECTION CHART FOR DIAGNOSIS
CODES.
NG
Check the throttle position sensor system. (Refer to P.13B-12,
INSPECTION PROCEDURE FOR DIAGNOSIS CODE 14.)
Yes
Check the vehicle speed sensor system. (Refer to P.13B-14, IN-
SPECTION PROCEDURE FOR DIAGNOSIS CODE 24.)
NG
Check the EGR control solenoid valve system.
(Refer to P.13B-47, INSPECTION PROCEDURE 34.)
13B-33