I am in the process of installing my autometer cobalt series fuel pressure gauge, and the stem on the fuel rail valve is stuck. We have removed it many times with no problems, and have reinstalled it many times with no problems. However now it is stuck and we can't get it out. Luckily I am not leaking fuel, and my car is running fine. However, we need to remove it in order to finish the install on the gauge. The schrader removal tool is NOT working suddenly. What do I do?

If I have a shop somehow forcefully remove it then I better hope to hell that this gauge works lol.
What do you recommend guys?
Thanks.

EDIT: What is the easiest way to remove the stem in the fuel rail valve, if the schrader removal tool won't work