I just purchased a 2006 Subaru Impreza OBS, 5spd manual. I'm having major lack of power issues on hills. When I test drove it, it did fine and was fine the first couple of days, which were at sea level. Then I drove it home to 8000 feet.
At about 5000 feet I started to notice the lack of power. Today, I drove home from work, up the grade, in 3rd gear and barely made it to 60.
Is this just an under powered engine or is there something wrong? Any suggestions?