i changed the 15 psi spring out for the 17 psi spring and it worked great, then i went back and put the 15 psi spring back in and the regulator which is on pump snd there is no pressure but the pump does run when bumped. is there something under the ring that the spring sits on that i could have misaligned?

This is the assembly of the AirDog 150 fuel pressure regulator...Might mis-seated the ball in the regulator. I've seen where the ball get pinned against the wall and never seals the hole so the pressure is really low. I've found that using a pencil to hold the ball in place of the seat while screwing the fitting back in help keep it from screwing up.

i am taking pump out in the morning to make sure the ball position when the sleeve and spring go in. i will try to take detailed pictures just incase i cant figure it out.

Which are we talking about an AirDog pump or Raptor pump?

Raptor... The best I could do is the Airdog...

i removed the dual spring regulator assembly and there is no ball in there.... i took pics but i want to find that ball first before i post them..... u guys think i should take the output fitting off and check ?

Well your this far document it...

Well your this far document it...

i have have taken pics at every stage. you guys always help me out i figure its a chance to help a raptor owner in the future.

--- Update to the previous post...

i have have taken pics at every stage. you guys always help me out i figure its a chance to help a raptor owner in the future.

if i take off the backing plate to pump, should anything pop out?

Not that I know of...

man...i have no idea.....i will carefully poke around in the ports and see if the ball somehow got jammed in there.... but other than that.... i have no idea... i think i will check my filter canister after that....haha

--- Update to the previous post...

i couldn't find that ball anywhere. not sure if this is right..i reinstalled the same assembly and viewed the output line port, i pressed the plunger which is at the bottom of the reg assembly and it is pretty firm. if there is a ball there it is going to be rock solid. i would think that if there was a ball meant to seat there wouldnt there be a radius of some sort and not just a 90 degree edge. im sure a ball will seal on a sharp edge but the way the plunger perfectly sits on that edge is kinda funny...it seems like it should regulate as is, the pressure should be much less if a ball was meant to be there but it should put out at least 5 psi, right?

Throw some pictures up so we all can take a peek a second maybe give you an idea...

1-Outlet Port--------- 2- Regulator assy.---3- Regulator assyCavity---4-Bottom seat-----5- Bottom seat # 2Here are a couple pics. The exterior rim of the Bottom seat presses flat against the machined 90 degree flat. It looks like a ball seats in the bottom seat but let me know what you think.

Is there a possibility there is no check ball in the regulator assembly. It looks like the end of the regulator assembly fits the seat. I could not find an exploded veiw of it at the Pureflow site.

that was my other thought as well...it does fit nicely. i can compress the bottom end in smoothly yet seems firm enough for proper pressure regulation from outlet port.

Thats a sleeve style regulator...What you have to be sure of that its not binding up.

i installed springs and verified that it compresses smoothly in sleeve using outlet port bore.thanks so much.

so i spoke to pureflo tech just now and before i finished my sentance he asked for my shipping address and said they would ship a viton check ball to replace the current seal which is the "bottom end" in my pics. anyone having trouble with pureflo regulators that have a sleeve style regulator, just call them and get a free viton check ball for better sealing/priming.