so i have the power fc and i have all the support mod for the cars. the probrams that i cant boost more than 18psi . whan ever i hit 18psi i got some kind off fuel cut or boost cut . is a fuel cut or boost cut that u have to set on the power fc ?

 

go to settings--> boost , set all the boost values to 2.00 and the boost cut will be disabled. i presume you have an aftermarket boost controller here.

 

yes i do has a aftermarket boost controller. r u talking about the commander or that fc dataloger

 

You need to read page 28 of the PFC manual, the last 2 paragraphs.
Can be done with either.

Best to not run over 16-17 psi boost on the best street gas. Depends on if you have optimized water and intake cooling and tune.