Last night something freaky happened. I was next to another supra and he wanted to go. I floored the car and it went to 4K and all i heard was a loud POP! and the car just shut off! My friends behind me said they saw a HUGE amount of black smoke! We first thought it was the plugs and went ahead to change it! Car still wouldn't start, after awhile the car started up but idle was really rough, any ideas of what could have happened?