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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE> 13B-1017 STEP 7. Check the fuel pressure. Refer to On-vehicle Service − 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. c. Check compression pressure. d. Check the fuel filter or fuel line for clogging. Then confirm that the malfunction symptom is eliminated. NO : Repair or replace it. Then confirm that the malfunction symptom is eliminated. INSPECTION PROCEDURE 16: Acceleration shock. . COMMENT • There may be an ignition leak accompanying the increase in the spark plug demand voltage during . TROUBLESHOOTING HINTS (The most likely • Malfunction of the ignition system. • Malfunction of the electronic control throttle valve system. DIAGNOSIS Required Special Tools: • MB991958: Scan Tool (MUT-III Sub Assembly) • MB991824: V.C.I. • MB991827: USB Cable • MB991910: Main Harness A |