altitude power loss
Recently i took my 06 wrx with very basic mods (intake, access port, bov) up from sea level to around 6-7k feet up. when i was up at altitude i lost a significant amount of power. My access port had told me at sea level the max boost would be 13.3psi, but once at altitude the highest it would get was around high 8s to around 9.1psi and the car just felt a lot more sluggish. Ive been running the stage 1 tune with my car. This made me think that maybe a hose was loose but on inspection i couldn't find anything out of the ordinary. When i was driving down from the high elevation i watched as, slowly, the boost began to work its way back higher and higher, and now back at sea level boosts to the normal 13.3psi. Im not sure if that was just the altitude or something weird going on but I would like to know. It has happened a few times when i have gotten higher than a couple thousand feet. Not sure what to do!