Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Repair Procedures: Inspection
[On-Vehicle Inspection]Β
- Accelerate the Engine to about 3, 000 RPM 3 times or more.
- Remove the Spark Plug.
- Check the Spark Plug visually.
If the electrode is dry, the spark plug is normal.
If the electrode is wet, check for damage and inspect the electrode gap as follows.
[Component Inspection]Β
- Check the Spark Plug for any damage on its thread and insulator.
If there is damage, replace the spark plug.
- Check the electrode. Measure the insulation resistance with an ohmmeter.
If the resistance is less than the specified value, adjust the electrode gap.
Specification:Β 10 MΞ© or more
- Check the Spark Plug electrode gap.
If the gap is greater than the maximum, replace the spark plug.
Specification:Β 1.0 ~ 1.1 mm (0.0394 ~ 0.0433 in.)
NOTE:- When adjusting the gap of a new spark plug, bend only the base of the ground electrode. Do not touch the tip.
Never attempt to adjust the gap on a used plug.
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.