WTF is going on??

[puppet]

Did you test the line from the pump before the rail first? If not, you should because otherwise you're still guessing.
If you did and it checked OK I'd take the rail itself out of the loop. Can you do that ... or no more plain hose connection possible from the pumps hard line?

If you can, pull the fpr from the rail and connect the bottom barb to the pump supply line. Clamp it tight. Hose from the return nipple to bucket and test.
No air ... and you tested the main run to the fpr ... your rail is the problem.
If you get air and you've tested the main run to the rail the you'll know it's the fpr.

[GLHNSLHT2]

Quote:

Originally Posted by puppet Did you test the line from the pump before the rail first? If not, you should because otherwise you're still guessing. If you did and it checked OK I'd take the rail itself out of the loop. Can you do that ... or no more plain hose connection possible from the pumps hard line?

I disconnected the hose just before it goes into the rail and was able to hook a clear line up there and pump into a bucket. No air. 100_1362 is where I disconnected it at.

Of course this was after I pulled the pump assembly, F'd around with it for an hour or so, got gas all over me etc. Should of done this step 1st

Quote:

If you can, pull the fpr from the rail and connect the bottom barb to the pump supply line. Clamp it tight. Hose from the return nipple to bucket and test. No air ... and you tested the main run to the fpr ... your rail is the problem. If you get air and you've tested the main run to the rail the you'll know it's the fpr.

Hmmm ok, I was gonna get a 1/4" NPT to hose barb adapter at the hose store tomorrow and put it where my shrader valve is to by pass the pressure reg that way. I'll try it both ways and see what happens.

If it's NOT the FPR how can air be getting in without fuel spraying out?

[puppet]

That's a good question brother. Only other way I can imagine is through an injector itself.

You'd think there is enough pressure to hold back any air entry. This is one for the books for sure.

[puppet]

FWIW ... I have a modified rail ... center tube removed and no dampener. No issues here with that.

[jim34]

The only place air could get in without leaking gas would be inside the tank.
Only other idea i can come up with is a restricted or blocked return line.

What are you doing for a vent line ?

[GLHNSLHT2]

You guys aren't going to believe this.

Today I ran to the hose store and got a 1/4" to hose barb adater so I could bypass the regulator and test the rail. Came home and picked up my FPR's that came in the mail and got to work. No air through the rail. So I hooked up the FPR like Puppet suggested and turned on the pump. Got some air so I checked all the FPR's I had. The 2 new one's didn't pump any air although one spewed fuel out the vac line so I used the good one. Put it on the rail and ran a clear line from it to the hard line. No air! GREAT! So hooked the braided line up. Turn on the pump and ARGH! Air! or gurgling that sounds a lot like air. So this is the point I'm at right now. 09-20-08_1546 Sorry for the crappy quality the only camera I had access to was my cameraphone. I have the braided line hooked to the FPR. Then the clear line hooked to that and then to the hardline (the clear line loops out of the picture). Running the pump like this I have NO air! As soon as I hook up the braided line back to the factory hardline the system gurgles again like there's air in the system.

I didn't try hooking everything up and starting the car yet. Not sure if it would of done any good.

[crazymadbastard]

I would just kill myself if I were you.

[puppet]

So the braided line is sucking air? ... like the "french/italian effect guy" theory?

LOL ... run the clear and slam the hood.

... but wait a second, you have the braided line in that clear line loop. <--- no air? Got to be that comp fitting on the return line to the tank then.

[GLHNSLHT2]

Quote:

Originally Posted by crazymadbastard I would just kill myself if I were you.

Tempting.

[GLHNSLHT2]

Quote:

Originally Posted by puppet So the braided line is sucking air? ... like the "french/italian effect guy" theory?

huh?

Quote:

LOL ... run the clear and slam the hood.

I might if i could put a clamp on it

Quote:

... but wait a second, you have the braided line in that clear line loop. <--- no air? Got to be that comp fitting on the return line to the tank then.

yes i have the braided line in the loop and no air.

The return line doesn't have a compression fitting. It's a tube nut and sleeve. If you're not familiar with that what you do is slide the nut then the sleeve over the tubing, Then you flare the end of the tubing to a 37 degree and slide the sleeve up to the back of it, the nut then pushes the sleeve against the flare you put on the tube and your AN fitting and the tube nut screw together.

There is hardly any pressure in the return system as you can see the clear tubing is just pushed over the -6 end on the return line. I had to clamp it to the other end cause it's -4 right there.

Maybe I should try some blue loctite???? or see if i can put more of a flare on the tubuing? Although it seems to be making plenty of contact with the AN -4 to -6 adapter I have there.

[puppet]

OK ... is the sleeve like a bushing in this case? OD of the return line under spec for the fitting? Otherwise why the sleeve?

Anyway the nose of the sleeve has a 37* angle then too right?

Redo the flare and try again. I know that flares have to be pretty smooth ... (tip: drop of oil on the cone) and take that ridge out after using your mini (tubing cutter) in there.

Oh, and don't use any dope in that connection. Wouldn't want any surprises later.

[puppet]

Wait a second ... #2 ... duh!

That hard line sleeve fitting is in the clear hose loop too (right?). The only one that isn't is the AN to AN (blue coupler to blue flare) connection Jay

That's AN factory right?

[puppet]

... crap ... bet he's outside cutting pipe.

[GLHNSLHT2]

to take the clear hose out of the loop i pull it off what you see connected to the factory hardline. Then on the other end you see the clear tube is hose clamped to a -4 to -6 adapter and screwed into the female -6 hose end. I just unscrew the hose end from the adapter leaving the clear line hose clamped to the adapter and screw the female hose end onto the -4 to -6 adapter thats connected to the factory hardline's -4 tube nut and sleeve.

so everything I run is in the loop + a clear tube and the adapter. That's wy maybe I'm thinking it's the flare on the hardline not sealing as a possibility but the hose is just pushed over the flare and the tube sleeve and the nut is loose on the backside.

[GLHNSLHT2]

haha I gave up playing with it at 2pm PST. Needed your guys feedback and I'll give it a try tomorrow