Well a ZO6 and i were involved in a spirited drive on the freeway today and =I topped out fourth gear then had to break, drove normal got off the highway and punched it in second shifted to third started to build boost, then it was stumbling. This is the first time my car has ever done this, it worried me so i obviously shifted lightly got into boost into 4th and nothing, has anyone else had this problem and maybe could tell me what the hell my car is doing, i am afraid to get into full boost now.