The first time that I changed my spark plugs they were black and looked like every other normal used spark plug I have seen; however, my car recently started misfiring and generally had no power. So I pulled the plugs and they were orange in color, so I changed them. The car runs fine now, but I am just wondering why they got like that and why so fast(less than a year)
The only thing I can find is on a spark plug chart it says that they can look like that because the engine is running hot...but here are some pictures(not the best)
