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EC-248 < DTC/CIRCUIT DIAGNOSIS > [VQ35DE] P0300, P0301, P0302, P0303, P0304, P0305, P0306 MISFIRE 3. Crank engine for approximately 3 seconds, and recheck whether spark is generated between the spark Is the inspection result normal? YES >> GO TO 7. NO >> Check ignition coil, power transistor and their circuits. Refer to . 7. CHECK SPARK PLUG Check the initial spark plug for fouling, etc. Is the inspection result normal? YES >> Replace spark plug(s) with standard type one(s). For spark plug type, refer to . NO >> Repair or clean spark plug. Then GO TO 8. 8. CHECK FUNCTION OF IGNITION COIL-III 1. Reconnect the initial spark plugs. 2. Crank engine for approximately 3 seconds, and recheck whether spark is generated between the spark Is the inspection result normal? YES >> INSPECTION END NO >> Replace spark plug(s) with standard type one(s). For spark plug type, refer to 9. CHECK COMPRESSION PRESSURE Check compression pressure. Refer to . Is the inspection result normal? YES >> GO TO 10. NO >> Check pistons, piston rings, valves, valve seats and cylinder head gaskets. 10. CHECK FUEL PRESSURE 1. Install all removed parts. 2. Release fuel pressure to zero. Refer to 3. Install fuel pressure gauge kit [SST (J-44321)] and check fuel pressure. Refer to Is the inspection result normal? YES >> GO TO 12. NO >> GO TO 11. 11. DETECT MALFUNCTIONING PART Check fuel hoses and fuel tubes for clogging. Is the inspection result normal? YES >> Replace “fuel filter and fuel pump assembly”. NO >> Repair or replace malfunctioning part. 12. CHECK IGNITION TIMING Check idle speed and ignition timing. EC-13, "BASIC INSPECTION : Special Repair Requirement" Spark should be generated. SEF156I Spark should be generated. At idle: Approximately 350 kPa (3.57 kg/cm 2 , 51 psi) |