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Idle Surge ?/Boost Controller

I just recently bought my Galant and its got some bad idle surge wondering if anyone can help me fix it. Its pretty of and on though, sometimes its really bad sometimes it idles fine. When its bad if i put the clutch in it surges so low it shakes the car and then actually shuts of and i have to restart it. Any help would be appreciated thanks.

Now the boost controller, I just bought a turbo xs boost controller and do not really understand how to set it up. In my car there is a T fitting with 3 different vacuum hoses going to it. One from the blow off valve, one from the ECI and one from the wastegate actuator. I know were to hook up the tube from the actuator but i dont what other tube to use again any help thanks.

I am new to the DSM game so thanks for helping me.
 
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