i was surprised when i replace my plugs...
the car ran all these years on a step hotter plug gapped like NA protege
during my 1 year drive
it had like 3-4 bad launch (partly because the O2 sensor were gonna go bad soon i guess) / 3 bad grinding noise during highway drive, not sure whatever its transmission , clutch or engine.
anyway replaced them with ZFR6FGP gapped 0.029+_0.001（G power platinum tip）
the car ran all these years on a step hotter plug gapped like NA protege
during my 1 year drive
it had like 3-4 bad launch (partly because the O2 sensor were gonna go bad soon i guess) / 3 bad grinding noise during highway drive, not sure whatever its transmission , clutch or engine.
anyway replaced them with ZFR6FGP gapped 0.029+_0.001（G power platinum tip）
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