ST205 Boost Problem, Only hitting 3/4 boost on the stock guage Options

[cax_11]

I got my car about 2 weeks ago, and it does't hit full boost on the stock guage like those I see on youtube, There is no check engine light, I already reset the ecu, one day the boost went right up out of the blues and it pulled like crazy, but next day it stopped, any ideas anyone?? Any input is appreciated, I don't think its a boost leak because it doesn't fall back, it just stops around 3/4 up the boost guage and sometimes crawl up the rest of the way(sometimes).

[salv]

Best way to find out is to get an aftermarket boost gauge.

Also, The ECU actually affects the amount of boost your turbo is going to give out depending on the conditions it detects (8-10psi in 1st and 2nd gear and anywhere from 10-14 psi on all other gears)