Firebird V8-5.7L VIN G (2001)
Spark Plug: Service and Repair
Spark Plug Inspection
SPARK PLUG USAGE
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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.
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Ensure that the spark plug has the correct heat range. An incorrect heat range causes the following conditions:
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Spark plug fouling due to a colder plug
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A pre-ignition condition, causing spark plug and/or engine damage due to a hotter plug
SPARK PLUG INSPECTION
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Inspect the terminal post (1) for damage.
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Inspect for a bent or broken terminal post (1).
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Test for a loose terminal post (1) by twisting and pulling the post. The terminal post (1) should NOT move.
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Inspect the insulator (2) for flashover or for carbon tracking soot. This condition is caused by the electrical charge traveling across the insulator (2)
between the terminal post (1) and ground.