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MULTIPORT FUEL INJECTION (MPI) DIAGNOSIS MULTIPORT FUEL INJECTION (MPI) <3.8L ENGINE> 13A-580 STEP 7. Using diagnostic tool, check data list. . a. Item AC: Right Bank Heated Oxygen Sensor (front). • Fluctuates between 0 − 0.4 volt and 0.6 − 1.0 volt while idling after the engine has been warmed. (3) Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the sensor operating properly? YES : Go to Step 9. STEP 8. Check the fuel pressure. − Fuel Pressure Test Q: Is the fuel pressure normal? YES : Check the following items, and repair or replace the defective items. a. Vacuum leak. • Broken intake manifold gasket. • Broken air intake hose. • Broken vacuum hose. • Positive crankcase ventilation valve does not operate. b. Injector clogged. Then confirm that the malfunction symptom is eliminated. NO : Repair or replace it. Then confirm that the malfunction symptom is eliminated. 00DB076A MB991910 DATA LINK CONNECTOR MB991824 MB991827 |