Volvo S70 MBC/Wastegate Issue
 

Ok so i bought the cheap ebay MBC(i know wrong move) and attempted to install it today. i hooked to the wastgate and one end to intake/atmosphere. I don't know if my wastgate doesnt work or what, but i can not get the boost to go up or down no matter where i set the mbc at. before the install i get vacuum at idle when i get on it i go up to 7 psi when the trans shifts it hits 10 psi then bleeds back down gradually to 7 again when i let off it goes down to vacuum. Is any of that normal does the wastegate need to be adjusted or does my mbc or any mbc work on my car?