Car runs fine for most situations, including going up hills, getting on the highway etc. The turbo boosts fine and when its suppose to for most normal driving. If I punch the accelerator going between 40-60 MPH making the car downshift the turbo will cut out. Most times it doesn't cut out right away but within 5-15 seconds just enough for me to think I can get out in the left lane to pass only to have the turbo cut out. I can make it cut out anytime by doing that. I have tried other situations like accelerating hard from a stop or accelerating hard but not hard enough to make the car downshift and none of those situations causes the turbo to cut out. It kicks in fine and the boost goes to about 2:00-3:00. No smoke or hissing noises that I can hear.