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SEF575Q SEF156I SEF112T q A CHECK SPARK PLUGS. OK E NG Repair or replace spark CHECK COMPRESSION PRESSURE. I Check compression pressure. 2 , psi)/300 rpm 1,285 (13.1, 186) Minimum: 2 , psi)/300 rpm 991 (10.1, 144) Difference between each cylinder: 2 , psi)/300 rpm 98 (1.0, 14) OK E NG Check pistons, piston rings, CHECK FUEL PRESSURE. page EC-37. 2. Install fuel pressure gauge and check fuel pressure. Approx. 235 kPa 2 , 34 psi) OK E NG Check the following. I Fuel pump and circuit I Fuel pressure regulator I Fuel lines I Fuel lines I Fuel filter for clogging If NG, repair or replace. CHECK IGNITION TIMING. OK E NG Adjust ignition timing. CHECK COMPONENT OK E NG Replace heated oxygen CHECK MASS AIR FLOW SENSOR. Check “MASS AIR FLOW” in “DATA ⋅ m/sec: at idling 12.9 - 25.3 g ⋅ m/sec: at 2,500 rpm -------------------------------------------------------------------------------------------------------------------------------------- OR -------------------------------------------------------------------------------------------------------------------------------------- Check “mass air flow” in MODE 1 ⋅ m/sec: at idling 12.9 - 25.3 g ⋅ m/sec: at 2,500 rpm -------------------------------------------------------------------------------------------------------------------------------------- OR -------------------------------------------------------------------------------------------------------------------------------------- Check mass air flow sensor output OK E NG Check connectors for (Go to q B on next page.) GI MA EM LC FE AT PD FA RA BR ST RS BT HA EL IDX TROUBLE DIAGNOSIS FOR DTC P0300 - P0308 No. 1 - 8 Cylinder Misfire, Multiple Cylinder H H H H H H H EC-265 |