Inspection/Test
| Action
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DEFINITION: A mild to severe ping, usually worse under acceleration. The engine makes sharp metallic knocks that change with throttle opening.
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Sensor/System
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| • | Inspect for vacuum leaks and any unmetered air. |
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Fuel System
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| • | Test the fuel system for correct operation, restriction, volume, and pressure. Refer to
Fuel System Diagnosis
. |
| • | Ensure that quality fuel is being used. Consult the Vehicle Owner's Manual. |
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Ignition System
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| • | Inspect for damaged ignition coils within the ignition coil module assemblies. |
| • | Inspect for damaged or misaligned spark plug boots. |
| • | Inspect for a missing or damaged ignition module ground spring. |
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Engine Mechanical
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| • | Inspect the engine mechanical for oil consumption, carbon build up within the combustion chamber, correct engine compression, and correct base engine timing. Refer to
Symptoms - Engine Mechanical
. |
| • | Inspect the combustion chamber for excessive carbon buildup. |
| • | Inspect the following for incorrect basic engine parts: |
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Additional Inspections
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