Boost problems

[kernel]

When i want to raise the boost to 12 psi...it dosent hold it.

I have the following setting:

SET: 40%
GAIN: 22%
SET START: 10.0 psi
Warning: 14.0 psi and set to 0%

I have changed my stock bov to a HKS SSQV 2007, I have unplug the stock boost solenoid.

My engine is a complet stock S13 Blacktop with a blitz LM FMIC and blitz nur spec cat-back.

Is my actuator too soft to hold that kind of pressure ? My friend had a t25 on his redtop and he was boostin over stock boost no problem..

I have tried a brand new solenoid from another Greddy profec-b spec 2 boost controller and it do the same thing..

I also tried alot of setting and nothing work fine, it always spike to 12 psi then fall down back to 7 psi..then raise again to 10-12 psi. Its a big spike moving.

I had no problem boosting with this boost controller on my other red top.

what should I check next?

Thanks.