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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE> 13A-1022 STEP 6. 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. STEP 7. 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. Check the ignition coil and spark plugs. Then confirm that the malfunction symptom is eliminated. NO : Repair or replace it. Then confirm that the malfunction symptom is eliminated. INSPECTION PROCEDURE 20: Knocking . COMMENT • Incase such as the above, the cause is probably that the detonation control is defective or the heat . TROUBLESHOOTING HINTS (The most • Defective knock sensor. • Incorrect heat value of the spark plug. DIAGNOSIS Required Special Tools: • MB991958: Scan Tool (MUT-III Sub Assembly) • MB991824: V.C.I. • MB991827: USB Cable • MB991910: Main Harness A |