edelbrock fuel pressure regulator not working

[1972BlueC20]

I just installed my edelbrock fuel pressure regulator and it's not changing the fuel pressure even with the Allen screw turned all the way in. I have the line coming from the pump going to the in on the bottom and I have the line coming from one of the outs going back to the filter then carb. This regulator has 2 outs so I've got one plugged off. I have a gauge after the inline filter just before the line goes into the carb. It's showing no change in pressure even with the screw turned tight all the way inward.

What the heck could be going on? I'm hoping I made a bonehead mistake and have something hooked up wrong because this regulator is about 5 months old and I just took it out of the package recently so I probably can't return it.

Please help.

Here are some pics.

[1972BlueC20]

Pics

[88fordf150]

Screwing it in ( all the way down ) increases the pressure. You might try backing it all the way out. Let the pressure in the line die down and slowly increase to 5 to 5.5 psi.

[1972BlueC20]

Yeah I read that online while I was waiting for a response from the board. I screwed it all the way out til the screw came out completely. Then in screwed it back in just enough to stay threaded.


Still no change in pressure

What gives??

[88fordf150]

One more thing, Edelbrock has two different regulators ( #8190 4.5-9psi & #1789 1-4psi). Looks like you may have the 4.5-9psi.

[88fordf150]

Are you waiting long enough for the pressure to drop? If you have 9psi on the hose, filter & carb it may take awhile. What pressure is your gauge showing? I would take it loose and release the pressure and start over.

[1972BlueC20]

Well I figured it out......I had a suspicion that maybe it was messed up (defective) on the inside, so I took it apart and sure enough it was.

There is 2 springs, a diaphragm, a brass sleeve and a ball bearing....the brass sleeve was turned sideways and the little spring was binded on the lock washer thingy.....anyways I tried to fix it but I messed the little spring up before I could reassemble it correctly....I'm out $70 but oh well.....S&*T happens....going to the parts store now to get another regulator....if they have one that is....


Thanks for your help....I'll report back once I install a new regulator.