FX Valve operstion

[Keyman62421]

What are the symptoms of a bad valve? How can I test for bad valve?
I have a maverick 25 / 700.

Guns shoots accurately with just a "click" out past 150. then a poof or pop instead of the clean click( not big noises) and accuracy wanes and shot count is affected slightly.

 

[anonymous_.457]

What are the symptoms of a bad valve? How can I test for bad valve?
I have a maverick 25 / 700.

Guns shoots accurately with just a "click" out past 150. then a poof or pop instead of the clean click( not big noises) and accuracy wanes and shot count is affected slightly.

Could be valve stem.

 

[Bobbybeef]

I have had a couple bad valves that just leak dreamline series though.

 

[cosmic]

Remove shroud and place a balloon over the barrel deflated.. The next day check the balloon. If it is inflated you have a valve leak..