problem with low pressure kit

[Sked Finger]

i got a low pressure kit with a pure energy regulator. it will shoot once but the bolt wont blow back. ive adjusted the reg, but it still wont blow back. what is wrong or what should i do?

[PD98]

1) make sure the stock velocity adjuster is screwed out flush with the power tube, look down inside the gun with the barrel off, bolt cocked and no air on the gun.

2) start with the regulator at its maximum setting and decrease the pressure a little bit at a time. Shoot the gun several times at each setting to allow the reg to adjust.

[Ziggy13]

Is it oiled up good?

[Ramrodzergy]

i had the same problem if you hit the rear bolt with a rubber mallet it will have enough force to pop back. only thing is that wont help in the field. the other way i got it to pop back was to screw in the velocity adjuster to give it more back pressure.
the other thing is you might have the reg to high or low. i noticed on mine it didn't work at the 2 ends of the reg's range. but even with using those 2 options i have been unable to get my gun to fire over 100 fps. i tried Putin a spacer in to tighten up the spring but that attempt failed because it would bounce the pin in that the hammer hit causing it to continually leak. so my next attempt will be using a smaller spacer. i am still searching for way of how to get the low pressure kit to work.

[Coenen]

Where'd you get this LPK? It did come with the proper springs and hammer and all of that correct?

What are you running it on HPA or CO2? How old is the reg; to your knowledge has it been properly taken care of?

A great many questions to be asked in order to diagnose the problem.

Sounds to me like the gun just isn't getting enough input pressure to the valve. This coule be b/c of a slow leak in one of the fittings, or perhaps an air flow restriction somewhere inside. I seem to remember that the t-fitting for the volumizer and the air passage into the valve sometimes get screwed up in manufacturing and that can cause an air blockage.

Try it with a different tank, a different reg if possible, HPA if you are currently using CO2(but not vice versa), try YOUR tank on a different gun, check your fittings to make sure everything is properly sealed. One of thsoe things should successfully localize the problem.

[Ramrodzergy]

im currently running hpa.. were about to test it on a normal gun to make sure that the tank i bought is good.

i got the kit off eBay supposedly only use a few times. the springs and every thing look stock also i don't believe the spring could be changed cuz i cant figure out how to get the rear cocking pin off of the hammer. air flows freely from the volumiser portion into the main valve i believe there's no issue there. the reg seems that it could cause a air restriction it is considerably harder to blow thru then the rest of the system(normal mouth air pressure) the reg im using is from air america and seems to function fine.

this weekend ill gather some pictures and post them on my server so if any one wanting to look at the internals it may help identify any problems .

[Ramrodzergy]

oh i also tried it directly with no reg. it still didn't get above 150 if i remember right. ill have to check that again. as for the pb stores crono wasn't working quite right later.

[Coenen]

What kind of tank and what output pressure is it?

Is the hammer you got with the LPK stuff lighter than stock? It should be, I believe that the drive spring might be too, but don't quote me on that part.

Air America regs are usually good quality, are you sure you were turning the adjustment screw in the right direction and all of that? Is the reg put together and lubed correctly?

You're definitely getting closer to the problem, right now my money is on the tank or the reg, with an outside shot that you got jobbed on e-bay(although I doubt it).

[Ramrodzergy]

tank is a pmi 72 cu steal 3k psi tank.. i think ive seen in in there before.. it may be suspect hopefully we can verify that it works ok soon. its supposed to have an 800 psi output
yes the hammer is lighter and the spring is defiantly weaker then the normal stock spring(for reg high pressure)