Im having driveability issues with a TT cobra I bought. Here are some of the issues. The cars idle is up and down constantly. The vacuum reads 22-23. Another this is that in 5th and 6th gear the blow off valves constantly keep going off not letting me reach over 8lbs of boost or going over 90 mph. I dont understand why the car is running like shit. Runs fine in 1 2 3 gear. Also I believe the stock clutch is slipping while in gear hitting the boost. Im getting to the point already where I just dont want to deal with it and sell the car. I have only had it for two weeks.