He gets Props for actually finishing it, in all the years I've been in the Supra Community I've lost count of how many failed builds/projects there have been :nono:
A couple of minutes of searching would have given you the correct answer then you could have posted that, it's not like this issue hasn't been covered before.
I'd go back to basics, plug the WG into the boost source using only the side port and see how it behaves on just the spring, then I'd verify the ports on the boost control solenoid and replumb.
I'd then make 100% sure of the dipswitch settings on the unit as mentioned in the other thread...
That's why you put boost pressure into the back of the diaphragm to keep it closed.
5psi spring + 25psi boost = 30psi gate opening.
It's NOT a flapper style gate like stock.
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