My 99 GT with 4.6 is bucking like a bronco. I'm at the track and it was running strong with my new Procharger install. I lost power and determined that one of the o-rings on top of the injector was pushed out from the fuel rail. I installed new o-rings and re-seated the rail. It now is just surging and bucking when I drive it. It feels like it is not getting fuel and then getting fuel. Weird. Everything looks correct. Any suggestions? I bled the fuel rails in-case air was in the lines. I have two days here at VIR and I sure want to run some more!