I race at East Bay,..Check out members rides for my post it has tons of pics and videos,...Ok I will Do the TPS test!...Thanks alot for that Link,...I haven't ran a Crank pulley for about 4 years now ever since I have started because the stock one broke off and so I just grinded it smooth ans left the little numb on there haven't had a problem yet and I had it on my Z6 with no problems,...lol....What are the copper NGK's?..I put in some iridiums from my B16 put didn't notice a difference from the bocsh,....