ES 350 V6-3.5L (2GR-FE) (2007)
Spark Plug: Testing and Inspection
ON-VEHICLE INSPECTION
NOTE: In this section, the terms "cold" and "hot" refer to the temperature of the coils. "Cold" means approximately - 10°C (14°F) to 50°C (122°F).
"Hot" means approximately 50°C (122°F) to 100°C (212°F).
INSPECT SPARK PLUG
NOTE:
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Never use a wire brush for cleaning.
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Never attempt to adjust the electrode gap on a used spark plug.
a. Check the electrode.
1. Using a megohmmeter, measure the insulation resistance.
Standard insulation resistance: 10 M Ohms or higher
HINT:
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If the result is 10 M Ohms or less, clean the plug and measure the resistance again.
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If a megohmmeter is not available, perform the following simple inspection instead.
b. Alternative inspection method:
1. Quickly accelerate the engine to 4,000 rpm 5 times.
2. Remove the spark plugs
3. Visually check the spark plug.
If the electrode is dry, the spark plug is functioning properly.
If the electrode is damp, proceed to the next step.
c. Check the spark plug for any damage to its threads and insulator.
If there is damage, replace the spark plug.
NOTE: Use only the listed spark plug or equivalent to ensure engine performance and smooth driveability.