Quote:
Originally Posted by hun77777
i saw couple members posted up under dyi and others. what i meant by really bad was the prongs were light brownish color not black... you will know.
i didn't think that i had spark plug issues until i changed it. you get less mis-fires and notice bit of gain. according to some members, they actually gain hp after just changing plugs...
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It's okay for prongs to be brown in certain areas:
http://www.dragstuff.com/techarticle...ead-plugs.html
With 13k on my '07 I think I have a ways to go before changing them. No perf mods here... yet.