Alright I just got out of work for my lunch break. So Im driving about to turn and all I hear is grinding I was like why. I know you guys are thinking clutch. But its inside my engine bay. The night before I had had valve tapping. And backing firing from im guessing sparking plugs cause I could definetly hear it coming out of the exhaust. Like the put put put type of sound. I went to toyota the other day to buy the idrium spark plugs. I think the moron at the desk gave me the GT spark plugs thats what im suspecting cause I installed them a day before. Before the truck came I thought hm like me take a look at these spark plugs. Sure enough thery were black as night. They looked bad . But when I crank the car over w/o giving it gas the thing will not kick over. But when I do give it gas the damn thing starts grinding I guess thats the best description I can say. I might have a bent valve. I dont know can anyone help me out here. Also since I didnt do any modifications the the egine bay Toyota has to honor their 100,000 power train warranty. Because when I bought it 3 months ago it was a Used Certified 2000 Toyota Celica. And it came with the remainder of a 40,000 mile power train warranty. ie... Engine,Transmission, and Drivetrain.