I just got my X 2 months ago. The other night i sorta pushed it a little bit for the first time on the highway(late night, no traffic)...i had it in fourth, speed was about 95mph to 100mph and the rpms just dropped funny and the car felt weird..i switched to fifth and everything was ok...this is my first turbo car, is this the turbo reacting to the high rpm in fourth or something else..

 

I think you should be ok, boost is not going to last all the way to high rpm if you are stock. In another word, 100mph @4th you are probably at almost 7k rpm, and you are losing power.

I think you should get a tune, and you'll feel the difference.

 

yeah a tune should help you with that. do you have any modification on the car?

 

no mods..all stock. thanks for all the help

 

I'd check the infamous fuel pump relay while your at it....