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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE> 13A-79 TROUBLESHOOTING HINTS (The most • Timing chain in out of place. • Loose timing chain. • Intake variable valve timing sprocket tooth com- ing off. • ECM failed. DIAGNOSIS Required Special Tools • MB991709: Test Harness • MB992110: Power Plant ECU Check Harness |