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guys...i want to share with u some info about spark plugs...i've just changed spark plugs on my wira recently...it's a NGK G POWER..it's a platinum plug...when i fire up the engine it was fine..the next day i went on a journey from my hometown to kl...on my way...i found something is not right about my car..it feel sluggish/jerking only i'm overtaking and climbing the mountain...if u have ever driving from kota bharu to kl..u now what i mean..well it feel sluggish..then i found that the...