Me and adam hopkins go to tune my car yesterday with the boost controller and some 880cc injectors.
the boost controller seemed to work well but in 2nd gear the wastegate opened at 15-16psi then in fourth the WG did not open, and boost slowly creeped down as i stayed in it.
i have it connected in between the wg and the intake manifold, NOT the compressor housing on the turbo.

any suggestions on what might be wrong?

 

i also remember before i hooked the bc up my boost gauge read -20vac at idle. after i hooked up the bc it was -10vac....

 

Do you have pics of how you have it installed? Sounds like its not a strong enough vac source or the mbc is not set right.