WGP STO 3 way leaks out of front until cycling it once

[gogi19]

Hey ya'll

I recently completely rebuilt a 2005 WGP prostock that I picked up off of ebay but am having an issue with the 3 way on air up.

I replaced every single o-ring & seal in the setup (including all the orings in the 3 way), but the stock STO 3 way vents air out of the front on air up until I cycle it once. I was wondering if there's something basic I might be overlooking or maybe this is just normal behavior for these 3 ways?

I've tried adjusting the lpr a bit in both directions with no luck (it does seem to get a little quieter when I turn the lpr pressure up a hair but not to a point that fixes it. I've tried backing the timing in and out 1-2 turns in either direction but that doesn't work either.

Trying to get ideas before I try disassembling and replacing the o-rings on the 3 way again, thanks!

[warbosschoppa]

Lower the LPR until it doesn't cycle, then slowly adjust it until it does, then quarter turn more.

[superman]

Did you replace the ram piston oring?

[gogi19]

The internal one that goes over the pump arm? I actually may have forgotten that one! Let me swap it out and report back!

[superman]

no, the front one which is between the 2 bumpers.

[gogi19]

Ah yea, I definitely changed that one. But i'm going to change both while the ram is apart anyway and try it again

EDIT: Well it seems like that was it, works like a champ now! Thanks again for the advice, is the cause of that specific leak air getting around the ram piston o-ring and out through the front of the 3 way? Why does cycling seem to fix it? Just trying to further my tech knowledge.