I ended up hooking my boost gauge to the chamber A on the charge control valve... I found that my solenoid is not working properly some times... doesn't see vacuum at all... and after 4500 is not opening... sometimes is sending vacuum but can't switch to pressure and remains on vacuum past 4500 rpm... and just have worked 1 time... sending vacuum and pressure after 4.5 rpm....

this thread was very useful specially the part about hooking up the boost gauge...

https://www.rx7club.com/3rd-generation-specific-1993-2002-16/charge-control-valve-diagnosis-891571/

now im looking for a charge control solenoid to replace the faulty one... idk if im gonna be fine with a second hand solenoid or if i should get a new one... idk the price... neither the PN