Spark Plug: Service and Repair

ON-VEHICLE INSPECTION

INSPECT SPARK PLUG
1. Remove the spark plug cable.

NOTE:
When removing the spark plug cable, pull on the spark plug cable boot (not the cable), as it may be damaged.




2. Using a spark plug socket, remove the spark plug.

CAUTION:
Be careful that no contaminates enter through the spark plug holes.

3. Inspect the electrodes (A) and ceramic insulator (B).




INSPECTION OF ELECTRODES





4. Check the electrode gap (A).

Standard : 1.0 - 1.1 mm (0.0394 - 0.0433 in.)






INSPECT SPARK PLUG CABLE
1. Carefully remove the spark plug cable by pulling on the rubber boots (A).
Check the condition of the spark plug cable terminals (B), if any terminal has surface corrosion, clean it off, and if it broken or distorted, replace the spark plug cable.




2. Connect the ohmmeter probes and measure resistance.

RESISTANCE : 5.6kOhms/m ±20%





3. Resistance should not be higher than 10kOhms/m.
If resistance is higher, replace the cable.