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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <2.4L> 13A-801 STEP 3. Using scan tool MB991958, check data list. CAUTION To prevent damage to scan tool MB991958, always turn the Reference Table a. Item 14: Throttle Position Sensor. (4) Turn the ignition switch to the "LOCK" (OFF) position. YES : Refer to, Clean the throttle valve area NO : Repair or replace. Then confirm that the malfunction symptom is eliminated. INSPECTION PROCEDURE 18: Poor acceleration. . COMMENT • Defective ignition system, abnormal air/fuel ratio, poor compression pressure, etc. are suspected. . TROUBLESHOOTING HINTS (The most likely • Malfunction of the ignition system. • Malfunction of air/fuel ratio control system. • Malfunction of the fuel supply system. • Poor compression pressure. • Clogged exhaust system. DIAGNOSIS Required Special Tools: • MB991958 (MUT-III Sub Assembly) • MB991824: V.C.I. • MB991827: USB Cable • MB991911: Main Harness B AK300810 AB MB991911 16-PIN MB991827 MB991824 |