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DTC P0300 - P0308 NO. 8 - 1 CYLINDER MISFIRE, MULTIPLE CYLINDER MIS- FIRE EC-301 C D E F G H I J K L M A EC 9. DETECT MALFUNCTIONING PART Check the following. ● Fuel pump and circuit (Refer to EC-513, "DTC P1220 FUEL PUMP CONTROL MODULE (FPCM)" ● Fuel pressure regulator (Refer to ● ● Fuel filter for clogging >> Repair or replace. 10. CHECK IGNITION TIMING Check the following items. Refer to OK or NG OK >> GO TO 11. NG >> Follow the “Basic Inspection”. 11. CHECK HEATED OXYGEN SENSOR 1 BANK 1/BANK 2 Refer to EC-219, "Component Inspection" OK or NG OK >> GO TO 12. NG >> Replace malfunctioning heated oxygen sensor 1. 12. CHECK MASS AIR FLOW SENSOR With CONSULT-II Check mass air flow sensor signal in “DATA MONITOR” mode with CONSULT-II. With GST Check mass air flow sensor signal in MODE 1 with GST. OK or NG OK >> GO TO 13. NG >> Check connectors for rusted terminals or loose connections in the mass air flow sensor circuit or engine grounds. Refer to EC-179, "DTC P0102, P0103 MAF SENSOR" . 13. CHECK SYMPTOM MATRIX CHART Check items on the rough idle symptom in OK or NG OK >> GO TO 14. NG >> Repair or replace. Items Specifications Target idle speed 650 ± 50 rpm (in “P” or “N” position) Ignition timing 12 ± 5 ° BTDC (in “P” or “N” position) 3.8 - 5.2 g·m/sec: at idling 16.0 - 21.5 g·m/sec: at 2,500 rpm 3.8 - 5.2 g·m/sec: at idling 16.0 - 21.5 g·m/sec: at 2,500 rpm |