Mitsubishi Lancer Evolution IX. Manual - part 450
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-275
STEP 33. Replace the engine-ECU
• After engine-ECU is replaced, re-check for trou-
ble symptoms.
Q: Does trouble system persist?
YES :
Check for foreign matters (water, kerosene,
etc.) in fuel and replace if necessary.
NO :
The check is end.
Inspection Procedure 9: The Engine Stalls when Starting the Car (Pass Out)
COMMENT ON TROUBLE SYMPTOM
• Engine stall on starting is possibly caused by mis-
fire due to failed spark plug, improper air-fuel
ratio at accelerator pedal depression or other
faults.
PROBABLE CAUSES
• Failed ignition system
• Failed intake system
• Failed emission gas cleaning system
• Failed engine-ECU
DIAGNOSIS PROCEDURE
STEP 1. M.U.T.-II/III diagnosis code
Q: Diagnosis code set?
YES :
Inspection chart for diagnosis code (Refer
to
NO :
Go to Step 2 .
STEP 2. Check EGR control solenoid valve itself.
• Check EGR control solenoid valve itself (Refer to
GROUP 17
− Emission Control System −
Exhaust Gas Recirculation (EGR) System
Q: Is the check result normal?
YES :
Go to Step 3 .
NO :
Replace the EGR control solenoid valve.
STEP 3. Check EGR valve itself.
• Check EGR valve itself (Refer to GROUP 17 −
Emission Control System
− Exhaust Gas Recir-
).
Q: Is the check result normal?
YES :
Go to Step 4 .
NO :
Replace the EGR valve.
STEP 4. Check air intake from intake hose and
intake manifold.
Q: Is the check result normal?
YES :
Go to Step 5 .
NO :
Repair or replace the connector.
STEP 5. Connector check: B-103 and B-114
ignition connectors
Q: Is the check result normal?
YES :
Go to Step 6 .
NO :
Repair or replace the connector.
STEP 6. Check ignition coil spark.
Q: Is the check result normal?
YES :
Replace the engine-ECU.
NO :
Go to Step 7 .
STEP 7. Check spark plug.
Q: Is the check result normal?
YES :
Go to Step 8 .
NO :
Replace the spark plug.
AK305047
1
2
3
Connector : B-103, B-114
B-114(GR)
B-103(GR)
AB
Harness side
connector