Misfire Cyl X

Misfire cyl x

Checking the fuel injection system, ignition system and components

Note! In the event of diagnostic trouble codes (DTCs), that affect camshaft control or camshaft reset valve, these must be fault-traced first.

Hint: In certain cases, the engine control module (ECM) can determine which cylinder has misfired.

Check the fuel level in the fuel tank.
Check that the engine oil level is correct.
Check for moisture in the electrical terminals for the ignition coils and in the spark plug well.
Check the spark plugs. Search for damage in the insulation and other damage.
Check the engine intake system for air leakage.
Check the crankcase ventilation. Check for blockage.
Check the fuel pressure and residual pressure.
Check the compression of the engine.
Remedy as necessary.

Other information
- For information about the misfire diagnostic, see "Design and Function, Diagnostic function".
- Air leaks in the intake system, checking Air Leaks in the Intake System, Checking
- Fuel system pressure, checking Fuel System Pressure, Checking
- Leak detecting cylinder Testing and Inspection


Continue - Verification

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Verification




Verification

Verification

Hint: After carrying out the repair, check that the fault has been remedied.








- Ignition off
- Reinstall the connectors, components etc.
- Start the engine.
Check the misfire counter for the cylinder indicated by the diagnostic trouble code (DTC). All cylinders must be checked if the engine control module (ECM) has not detected a misfire in any specific cylinder (misfire in at least one cylinder).
The misfire counter must not count upwards and the engine must fire on all cylinders.

Note! Misfire can occur at different engine speeds and loads.





Is the function OK?

Yes - VERIFIED

No - VERIFICATION FAILED

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VERIFICATION FAILED - Fault-tracing information

VERIFIED - Fault Found

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Fault-tracing information




Information

Fault-tracing information
The fault should have been detected and remedied. As this is not the case fault-tracing has failed.
Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

Do you want to exit fault-tracing?

Yes - Exit Fault-Tracing

No - Attempt New Test

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Attempt New Test - ignition system and components

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