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Old 08-11-2005, 05:27 AM   #1 (permalink)
asm
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How to read spark plug?

Guys,

I just pull this out my 97 Camry. Since I am no expert in reading spark plug, any one care to chime in and tell me what can you guesss the condition of the engine by looking at these spark plugs?

Thanks

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Old 08-11-2005, 06:10 AM   #2 (permalink)
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From the tips , you should compare them to new, and see that they are worn out (gap is larger).

From the colour, grey-yellow, heat range correct.

Mixture OK, ignition adjustment (automatic), no misfires
There might be a bit of residue from engine oil. What is on the threads? 2nd from left looks to be wet.
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