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5 CHECK IGNITION SPARK 1. Disconnect ignition wire from spark plug. SEF575Q OK or NG OK © GO TO 6. NG © Check ignition coil, power transistor and their circuits. Refer to “DTC P1320 IGNITION 6 CHECK SPARK PLUGS Remove the spark plugs and check for fouling, etc. SEF156I OK or NG OK © GO TO 7. NG © Repair or replace spark plug(s) with standard type one(s). For spark plug type, refer to 7 CHECK COMPRESSION PRESSURE Check compression pressure. Refer to EM-14, “Measurement of Compression Pressure”. Standard: 1,275 kPa (13.0 kg/cm 2 , 185 psi)/300 rpm Minimum: 981 kPa (10.0 kg/cm 2 , 142 psi)/300 rpm Difference between each cylinder: 98 kPa (1.0 kg/cm 2 , 14 psi)/300 rpm OK or NG OK © GO TO 8. NG © Check pistons, piston rings, valves, valve seats and cylinder head gaskets. GI MA EM LC FE AT TF PD AX SU BR ST RS BT HA SC EL IDX DTC P0300 - P0306 NO. 6 - 1 CYLINDER MISFIRE, MULTIPLE CYLINDER MISFIRE Diagnostic Procedure (Cont’d) EC-323 |