Mitsubishi MOTORS Space Runner 1999 Workshop Manual Supplement page 506

INSPECTION PROCEDURE 6
Initial combustion but no complete combustion
(starting impossible)
In such cases as the above, the cause is probably that the spark plugs are generating
sparks but the sparks are weak, or the initial mixture for starting is not appropriate.
Check battery voltage when cranking.
OK: 8 V or higher
MUT-II Self-Diag code
Are diagnosis codes displayed?
MUT-II Actuator test
07 Fuel pump (Refer to P.13B-52)
MUT-II Data list
21 Engine coolant temperature sensor (Refer to P.13B-49.)
MUT-II Data list
18 Ignition switch-ST (Refer to P.13B-49.)
Can any sound be heard from the injectors when cranking?
Is starting good if the engine is cranked with the accelerator pedal
slightly depressed?
Check the ignition timing when cranking.
OK: Approx. 5_BTDC
Check the following items.
Check the ignition coil, spark plugs, spark plug cables. (Refer to GROUP 16 – On-vehicle Service.)
Check if the injectors are clogged.
Check the compression pressure. (Refer to GROUP 11A – On-vehicle Service.)
Check fuel lines for clogging.
Check if foreign materials (water, alcohol, etc.) got into fuel.
MPI –
OK
No
OK
OK
OK
OK
No
OK
Troubleshooting
Probable cause
Malfunction of the ignition system
Malfunction of the injector system
Foreign materials in fuel
Poor compression
Malfunction of the engine-ECU
NG
Check the battery. (Refer to GROUP 54 – Battery.)
Yes
Refer to P.13B-9, INSPECTION CHART FOR DIAGNOSIS
CODES.
NG
Check the fuel pump system.
(Refer to P.13B-42, INSPECTION PROCEDURE 26.)
NG
Check the engine coolant temperature sensor system.
(Refer to P.13B-13, INSPECTION PROCEDURE FOR DIAGNO-
SIS CODE 21.)
NG
Check the ignition switch-ST system.
(Refer to P.13B-43, INSPECTION PROCEDURE 27.)
NG
Check the injector system, (Refer to P.13B-17, INSPECTION PRO-
CEDURE FOR DIAGNOSIS CODE 41.)
Yes
Check ISC servo for op-
eration sound.
(Refer to P.13B-75.)
OK
Clean the throttle valve area. (Refer to P.13B-65.)
NG
Check that the distributor is installed properly.
13B-25
NG
Check the ISC servo sys-
tem. (Refer to P.13B-46,
INSPECTION PROCE-
DURE 32.)