Engine Stalls During Deceleration - Mitsubishi Electric Lancer Evolution-VII Workshop Manual

Inspection Procedure 10

Engine stalls during deceleration

Causes shown on right are suspected.
Has the battery terminal been disconnected recently?
MUT-II Self-Diag code
D Is a diagnosis code output?
MUT-II Data list
D No. 14: Throttle position sensor (Refer to P.13A-103.)
MUT-II Data list
D No. 45: Idle speed control (servo) position
D Does the idle speed control (servo) position drop to 0 to 2
steps during deceleration (engine rotation speed 1000 r/min or
more)?
Check the throttle body (throttle valve section) for contamination.
Check the EGR control solenoid valve.
(Refer to GROUP 17 - Exhaust Gas Purifier Check.)
Check the EGR valve for sticking.
(Refer to GROUP 17 - Exhaust Gas Purifier Check.)
Check the trouble symptoms.
Replace the engine-ECU.
MPI -
Troubleshooting
NO
NO
OK
NO
OK
OK
OK
NG
Probable cause
D Idle speed control system malfunction
D Exhaust gas purifier system malfunction
D Throttle valve malfunction
D Engine-ECU malfunction
YES
After warming up the engine, idle for approximately 10 minutes.
YES
INSPECTION CHART FOR DIAGNOSIS CODE
(Refer to P.13A-12.)
NG
Check the Code No. P0120: Throttle position sensor system.
(Refer to P.13A-21.)
YES
Check the Code No. P0500: Vehicle speed sensor system.
(Refer to P.13A-43.)
NG
Clean the throttle body (throttle valve section).
(Refer to P.13A-126.)
NG
Replace the EGR control solenoid valve.
NG
Replace the EGR valve.
OK
End
13A-67