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ENGINE DRIVEABILITY AND EMISSIONS 6E–269 SPARK PLUGS Location Removal Procedure 1. Disconnect the negative battery cable 2. Remove the spark plug cable. 3. Remove the spark plug. Inspection 1. Check the insulator for cracks. Replace the spark plug if cracks are present. 2. Check the electrode condition and replace the spark plug if necessary. If the spark plug electrodes and insulators are fouled • Fuel mixture is too rich. • Oil in the combustion chamber. • The spark plug gap is not set correctly. • Fuel mixture is too lean. • Heat range is incorrect. If vehicle usage does not conform to normal driving 3. Check the gaskets for damage and replace if necessary. 4. Measure the spark plug gap. The specification is 1.0 to 1.1mm (0.039 to 0.043"). 5. Adjust the spark gap by bending the grounded electrode. |