Spark Plug: Testing and Inspection

On-vehicle Inspection

Spark test

1. Disconnect the LH/RH ignition coil connectors (A).








2. Remove the LH/RH ignition coils (A).








3. Using a spark plug socket, remove the spark plug.
4. Install the spark plug to the ignition coil.
5. Ground the spark plug to the engine.





NOTE:
Crank the engine for no more than 5 - 10 seconds.
To prevent fuel being injected from injectors while the engine is being cranked, disconnect the injector connector.

6. Inspect all the spark plugs.
7. Using a spark plug socket, install the spark plug.

Tightening torque :
14.7 - 24.5N.m (1.5 - 2.5kgf.m, 10.8 - 18.1lb-ft)

8. Install the ignition coil.

Tightening torque :
9.8 - 11.8N.m (1.0 - 1.2kgf.m, 7.2 - 8.7lb-ft)

9. Reconnect the ignition coil connector.





Inspect Spark Plug

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

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

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




Inspection Of Electrodes





3. Check the electrode gap (A).

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