Havent got to clear the code yet. Yea it was white/greyish with a little buildup. Im sure as h*ll I hit the rev. limiter I was pretty pissed and just floored it till I realized I was an idiot to late tho. It seems to go to real hell @ 4,000 rpm. Either way the WORK ON MEE therory makes sense as long as you wouldnt think it knocked sumthing loose out or anything like that even tho if that were the cae my plug woulda been smashed