MM fps on 400+ not lowering

[Spider-TW]

When I turn the back screw counter clockwise to lower the fps it just "shuts down" it doesn't cock back.

Perhaps the spring pack is in upside down. The classic valve spring packs have a center post that runs into the pocket of the piston. If you put it in upside down, the adjuster nut just cranks on the post, making it on or off "regulation".

[Chencho]

I'll do that when I get back home and see, that may be it. Its something like on/off... Mmm...

[athomas]

What are you guys seeing in "doesn't pressurize"? I don't see how it lacks pressure at 400 fps.

In post number 4 it mentioned "When I try the valve just doesn't pressurize". I assumed that when he tried to fix one problem, he caused another.

[Chencho]

Nah, the powertube leak was the PT o-ring.

Now is that it doesn't regulate under 400fps and it does something like on/off like spyder wrote

[Chencho]

Perhaps the spring pack is in upside down. The classic valve spring packs have a center post that runs into the pocket of the piston. If you put it in upside down, the adjuster nut just cranks on the post, making it on or off "regulation".

Just got home, checked the pack and aparently that was it, trigger is light as it was and shoots quiet. Chrono tomorrow and will update. Just learning with every mistake :-)

[Chencho]

My baby is shooting.like a pro again!!

Thanks to you all, idk what I would've done without AGD addicts :-)

Thank you!!