DTC P0300 - P0304 NO. 4 - 1 CYLINDER MISFIRE, MULTIPLE CYLINDER MISFIRE - Diagnostic Procedure (Cont'd)
EF & EC-7173flowchartDiagnostic Procedure (Cont'd)
DTC P0300-P0304 Cylinder Misfire Diagnostic Procedure (Cont'd)
1
6. CHECK IGNITION SPARK
1. Turn ignition switch "OFF".
2. Disconnect ignition coil assembly from rocker cover.
3. Connect a known good spark plug to the ignition coil assembly.
4. Place end of spark plug against a suitable ground and crank engine.
5. Check for spark.
NG
Check ignition coil, power transistor and their circuits. Refer to EC-7228.
OK
2
7. CHECK SPARK PLUGS
Remove the spark plugs and check for fouling, etc.
NG
Repair or replace spark plug(s) with standard type one(s). For spark plug type, refer to "ENGINE MAINTENANCE" in MA section.
OK
3
8. CHECK COMPRESSION PRESSURE
Refer to EM section.
- Check compression pressure.
Standard: 1,324 kPa (13.24 bar, 13.5 kg/cm^2, 192 psi)/350 rpm
Minimum: 1,128 kPa (11.28 bar, 11.5 kg/cm^2, 164 psi)/350 rpm
Difference between each cylinder: 98 kPa (0.98 bar, 1.0 kg/cm^2, 14 psi)/350 rpm
NG
Check pistons, piston rings, valves, valve seats and cylinder head gaskets.
OK
4
GO TO 9.
See also
EC-7228