Spark Plug Inspection
Spark plug condition is indicative of engine operation. Check the spark plug firing end condition after the engine has been warmed up and the vehicle has been driven at higher speeds. Immediately check the spark plugs for correct color.
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Rotate the spark plug cap 1/4 turn and pull it off the spark plug.
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Rotate the spark plug counter-clockwise to remove it.
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Reverse the procedure for spark plug installation. Torque to specification.