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(3) Turn the ignition switch to the "LOCK" (OFF) position. Q:Are they operating properly? YES: Go to Step 6. NO: Repair or replace it. Then confirm that the malfunction symptom is eliminated. STEP 6. Check the spark plugs. Q:Are there any abnormalities? YES: Replace the spark plug. Then confirm that the malfunction symptom is eliminated. NO: Check the ignition coil. Refer to GROUP 16, Ignition System - Then confirm that the malfunction symptom is INSPECTION PROCEDURE 14: Hesitation, sag, stumble, Poor acceleration or Surge. M11310100291USA0000010001
COMMENT ⦆ Defective ignition system, abnormal air/fuel ratio, TROUBLESHOOTING HINTS (The most likely ⦆ Malfunction of the fuel pump system. ⦆ Malfunction of the ignition system. ⦆ Poor compression. ⦆ Malfunction of the EGR system. ⦆ Improper operation of the PCV valve. ⦆ Vacuum leak. ⦆ Clogged air cleaner. ⦆ Clogged exhaust system. ⦆ Increased resistance to the transmission drive ⦆ Malfunction of the ECM.
DIAGNOSIS Required Special Tools: ⦆ MB991958: Scan tool (M.U.T.-III Sub Assembly) ⦆ MB991824: V.C.I. ⦆ MB991827: USB Cable ⦆ MB991910: Main Harness A STEP 1. Check if the EGR valve sounds during initialization. Q:Is the initialization sound heard in the EGR valve? YES: Go to Step 2. NO: Refer to GROUP 17, Emission Control - EGR Valve (Stepper Motor) Check P.17c-14. MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS> 13Ab-791 SYMPTOM PROCEDURES |