| Main Action |
- Engine roughness through crankshaft speed fluctuation
|
- Ignition plug or coil
- Valve timing
- Compression pressure
- Air leak
- Fuel (injector) - related parts
- Cooling system
|
| Prerequisite Condition |
- Engine speed is higher than 550 RPM and lower than 6500 RPM
- Engine load is higher than Zero torque line
- Coolant temperature is higher than -7°C (19.4°F)
- Time after engine start is higher than 0 sec
- Then ECT is greater than 21°C (69.8°F)
|
| Case 1 |
Threshold Value |
- Misfire rate is greater than 2.5% pre 1000 revolutions
|
| Diagnostic Time |
|
| MIL |
|
| Case 2 |
Threshold Value |
- Rate of misfire per 200 revolutions is greater than 5~33% in driving condition
|
| Diagnostic Time |
|
| MIL |
|