There must be an improper vacuum line hook-up happening.

Here is a shot of a Talon engine bay, the BOV is tilted just behind the factory air can. You can see the BOV main vent hose aimed directly to the long skinny hose that is routed into the intake snorkel as it goes into the turbo - aluminum side of the turbo.



I will see if there are any good shots of how mine is setup.

Here is mine, the BOV is tucked onto the pipe going right up into the TB elbow. The vacuum line is going to



When no manual boost controller is installed, this is how your vacuum lines should be hooked up. Follow the lines to exactly the correct locations. Any difference in their locations can be VERY problematic.



IF for some reason you do not have the little nipple on the intercooler hard line, here is another diagram of how alternatively you can have the vacuum lines hooked up for the wastegate and BOV.



Words of advice from a rather capable user over at galantvr4.org (these are the cars that originally had the Cyclone intake manifolds in the first place).
Essentially a port off the intake manifold, behind where the injectors are located, is likely best and is the factory location for this.

I'm wondering if some of the rest of your vacuum hoses have any issues. BUT, let's see how you have your BOV installed and where the vacuum line was routed to.

When looking at that TB pic,on the left side there is a green cover with 2 screws.Under that cover is the cold idle valve.There is a plastic ring that the copper bullet sets against that backs out over time causing a hi idle all the time. Just take the cover off and screw the plastic ring back in. Then put a drop of paint on the threads to stop it from backing out again. If you screw it in too much it won't idle high when cold.