Malfunction CSS

[Eminent]

Hello group.
When putting the car in neutral the idle rev's goes up regularly.
The problem is the CSS which is stuck in the out position and need a bit more force to go back in.
I would like to hear your thoughts about a solution for this problem.
A new CSS is hard to find, en when found quite expensive.
Is a linear actuator a solution?
Thanks for helping me out.