boost set to10 psi or 20 psi no in between

[mitsubishimanic]

So I had my MBC disconnected and was running waste gate pressure because i was having issues with the cars. Well got everything fixed and went to hook up my MBC again and couldnt get it to boost over wastegate pressure. So i contined to turn the nob up still no change. Untill one more quarter turn and all the sudden its boosting to 20 psi.I about crapped my self. I let off immedetly. Stopped and turned it down a querter turn and its back to 10 psi . I turned it a an 1/8 of a turn and back to 20 psi. I dont get it, is my MBC bad? Its the one that dejon tool makes. Never had a problem with it had it set to 14 psi before. Any one have any idea whats going on. Can a boost controller just go bad?

 

[dsmgst1996]

spring is broken so now your just blocking the port with the ball instead of regulating pressure.
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[mitsubishimanic]

ok well i am going to take it apart and see if the spring is sticking or whats up. i just dont get how it worked fine i took it off put it in my center consuel and now it dosnt work?