Issues with my cougar
 

I have a 1999 cougar with 2.5l v6 when its first started it runs fine and the duratech coms in about 4000 rpms but after it warms up it has no power in top end the duratech doesn't come in at all. Other than that the car runs great. The only mods it has are the exuast and an intake in the future. I need help any ideas anybody and also any ideas on where to get forced induction for that motor and other after market parts thanks