Oasis LS L4-2253cc 2.3L SOHC VTEC MFI (1999)
Spark Plug: Testing and Inspection
Spark Plug Inspection
1. Inspect the electrodes and ceramic insulator for:
Burned or worn electrodes may be caused by:
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Advanced ignition timing
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Loose spark plug
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Plug heat range too low
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Insufficient cooling
Fouled plug may be caused by:
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Retarded ignition timing
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Oil in combustion chamber
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Incorrect spark plug gap
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Plug heat range too high
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Excessive idling/low speed running
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Clogged air cleaner element
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Deteriorated ignition coil or ignition wires
2. Check the electrode gap.
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Adjust the gap with a suitable gapping tool.
Example Of Worn Plug
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Replace the plug if the center electrode is rounded as shown
3. Apply a small quantity of anti-seize compound to the plug threads, and screw the plugs into the cylinder head finger-tight. Then torque them to 18
N-m (1.8 Kgf.m, 13 lb.ft).