Mitsubishi MOTORS Space Runner 1999 Workshop Manual Supplement page 516

INSPECTION PROCEDURE 16
The feeling of impact or vibration when accelerating
In cases such as the above, the cause is probably that there is an ignition leak
accompanying the increase in the spark plug demand voltage during acceleration.
MUT-II Self-Diag code
Are diagnosis codes displayed?
Check the following items.
Check the ignition coil, spark plugs, spark plug cables. (Refer to GROUP 16 – On-vehicle Service.)
Check for occurrence of ignition leak.
INSPECTION PROCEDURE 17
The feeling of impact or vibration when decelerating.
Malfunction of the ISC system is suspected.
MUT-II Self-Diag code
Are diagnosis codes displayed?
Check the ISC servo for operation sound. (Refer to P.13B-75.)
MUT-II Data list
14 Throttle position sensor (Refer to P.13B-48.)
Clean the throttle valve area. (Refer to P.13B-65.)
MPI –
No
No
OK
OK
Troubleshooting
Probable cause
Malfunction of the ignition system
Yes
Refer to P.13B-9, INSPECTION CHART FOR DIAGNOSIS
CODES.
Probable cause
Malfunction of the ISC system
Yes
Refer to P.13B-9, INSPECTION CHART FOR DIAGNOSIS
CODES.
NG
Check the ISC servo system.
(Refer to P.13B-46, INSPECTION PROCEDURE 32.)
NG
Check the throttle position sensor system. (Refer to P.13B-12,
INSPECTION PROCEDURE FOR DIAGNOSIS CODE 14.)
13B-35