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Your ACV is consists of 3 valve functions; 1, relief 2, switching3, anti after burn. When you mention about ACV to air pump hose, if you are having to "angle the hose" you may be manupulating to open relief valve.
Relief valve is actuated by relief solenoid valve (ck valve) you might want to inspect the valve is functioning so that relief valve will open & close.
We all read your post and quite frankly didn't get where you were going with it until your second post.
I hope this will help you out in the cause of your issue.
Let us know how that goes.
FYI, solenoid valve is a check valve which direct air one direction and if its not working ACV will not function. Now, if your solenoid works your troubleshooting should go to ACV.
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