Spark Plug Usage

Ensure that the correct spark plug is installed. An incorrect spark plug causes poor driveability conditions. Refer to Ignition System Specifications for the correct spark plug.
Ensure that the spark plug has the correct heat range. An incorrect heat range causes the following conditions:
- Spark plug fouling due to a colder plug
- A pre-ignition condition, causing spark plug and/or engine damage due to a hotter plug