Hey everyone, I just purchased a 2005 elise. Car is supercharged and has a brand new motor in it. I test drove the car a few weeks ago and it was running good just a little rich. The owner I purchased the car from told me that he had already paid to get a high performance radiator installed and for the car to properly be tuned since the supercharger and motor were just added. Car has been in the shop this past week being tuned and having the radiator installed. Got the car today (finally) and was cruising around truly enjoying her, under 4k rpms not getting on her at all. I took her home, gave the car its first wash and wax and drove to work. My client wanted a ride so I wanted to get on the car a little, everytime I got on the gas (over 50% throttle) and started hitting higher rpms the entire car started bucking / hesitating / and running awful until i backed off on the gas. Car seems to run and idle perfectly when just cruising and not trying to get anywhere fast. Was curious if i could have wet something washing it? Has this happened to any of you? Could possibly be a bad tune, or who knows. The shop is 2 hours from my house so I would like to figure it out myself. Love the car, Its an absolute blast to drive I just want it running perfectly now! Any help / input would GREATLY be appreciated. Also any recommendations for service / mechanics on long island would be great also. Thank you!