My dyno shop got back to me said it's an Injector problem I bought the fuel injector clinic 1000s since iam only putting 676 whp. Said was a bit tricky since car is not using full potential of Injector. And when cool will be a rough a bit till warmed up. If that's the case iam gonna have to live with it and really cant say its any fun to drive this car when its 50 or below feels like iam on ice it wont hook even if put the throttle down half way. What do you guys think dyno shop right or keep digging?