i have been having a fuel pressure issue and can not figure out what’s going on. This is on my 383 stroker. I am running an 110gph 8psi mechanical fuel pump going into a Holley 12-880 billet return style regulator. The carb is an AED 750. I have a gauge installed on the regulator and another one at the carb. At the regulator I get good pressure but at the carb I only get 2-3psi. Turning the adjustment screw on the regulator seems to have no effect. Both the regulator and fuel pump are new. I even tried an old mechanical pump I had and still had the same issue. Has anybody ran into this problem? Yes, I know most people don’t run a regulator with a mechanical pump but I needed a way to run my return line back to the tank and the aftermarket pumps don’t have ports for return lines , only the stock style low gph “can” pumps have them. My fuel pump puts out 8psi anyway so I needed to regulate it some. AED wants 6-7psi at the carb.