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Every spark plug that I replaced at 100k that had not been regapped at around 50k, had a gap burnt out to almost double the specs. That alone is why one will run so much better after the plugs are changed out; the gap is back with in specs.


John ...Mine does not run better... Using the word "better" implies the thing was misbehaving in the first place. With modern computers and coil setups the larger gap is taken into stride by most of these vehicles. A larger gap in an older ride will cause misfiring from lack of a strong enough coil. And yes, if the thing is acting up go hahead and change out the plugs. But if it is doing good leave it alone.
Big Jim <img src="/forums/images/graemlins/pfft.gif" alt="" />

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