Emissions Impact / Catalytic Converter Damage / Start Up

Emissions impact / Catalytic converter damage / Start up

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.
Look for moisture in the electrical terminals for the ignition coils and in the spark plug wells.
Check the spark plugs. Search for damage in the insulation and other damage.
Check the engine intake system for 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, B5254T7 Fuel System Pressure, Checking

Continue - 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 that the misfire counter is not counting upwards. Check that the engine is firing on all cylinders.

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





Is the function OK?

Yes - VERIFIED

No - VERIFICATION FAILED

------------------------

VERIFICATION FAILED - Fault-tracing information

VERIFIED - FAULT FOUND

-------------------------------------------------

Fault-tracing information

Attempt New Test - Checking the fuel injection system, ignition system and components

-------------------------------------------------