boost too low

just installed an evo 3 16g turbo on 91 tsi also has new aftermarket fuel pump 550 injectors cuts out when hits 7-9 psi im thinking waste gate is not adjusted properly do i need to remove rod to adjust and do i lengthen the rod to tighten the spring

Do you have anything to control those 550s? Maybe a SAFC or somthing. If your flowing all of that fuel and still using it on the stock settings that could be the reason.

I am thinking the same thing. Do you have any type of fuel controller?