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).

[Driveby]

Check the coolant level in your charge cooler.

[cax_11]

Check the coolant level in your charge cooler.

yep, has no codes store, lights flashes continuously.

my stock gauge doesn't go above 3/4 while the aftermarket one shows 12psi at full boost.

Can you feel a lack of boost or are you relying on your gauge to tell you?

The stock guage went all the way for a few hours one time, and I felt a huge difference. I am in the process of getting an
aftermarket boost guage to see exactly what it does. Cause I've heard that the stock guage isn't very accurate.

its not that the stock gauge isn't accurate...it is just far too slow to get up to the boost level that the turbo is producing. The needle should rise at least as fast as your rpms...my aftermarket gauge is already showing my max boost before the stock gauge barely makes it past zero.

Ok then, guess I'll wait until my guage arrives to do more tests. My flex pipe in the exhaust is leaking, but am sure that would have nothing to do with it