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P0300, P0301, P0302, P0303, P0304 MISFIRE EC-191 < COMPONENT DIAGNOSIS > [QR25DE] C D E F G H I J K L M A EC N P O • Never place the spark plug and the ignition coil within 50 cm (19.7 in) each other. Be careful not to get an electrical shock while checking, because the electrical discharge voltage becomes 20 • It might damage the ignition coil if the gap of more than 17 mm is made. OK or NG OK >> GO TO 9. NG >> GO TO 6. 6. CHECK FUNCTION OF IGNITION COIL-II 1. Turn ignition switch OFF. 2. Disconnect spark plug and connect a non-malfunctioning spark plug. 3. Crank engine for about 3 seconds, and recheck whether spark is generated between the spark plug and OK or NG OK >> GO TO 7. NG >> Check ignition coil, power transistor and their circuits. 7. CHECK SPARK PLUG Check the initial spark plug for fouling, etc. OK or NG OK >> Replace spark plug(s) with standard type one(s). NG >> 1. Repair or clean spark plug. 2. GO TO 8. 8. CHECK FUNCTION OF IGNITION COIL-III 1. Reconnect the initial spark plugs. 2. Crank engine for about 3 seconds, and recheck whether spark is generated between the spark plug and OK or NG OK >> INSPECTION END NG >> Replace spark plug(s) with standard type one(s). For spark plug type. 9. CHECK COMPRESSION PRESSURE Check compression pressure. . OK or NG OK >> GO TO 10. NG >> 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 . Spark should be generated. SEF156I Spark should be generated. |