I just got done building my engine and fired it up yesterday. It started right up but did not build fuel pressure. It only gets up to 15 psi. Im now using an AEM fpr. It seems as though the regulator does not stop enough fuel to build pressure, no matter how much I turn in the adjustment screw. Also, when I pinch off the return line coming from the regulator, it does build pressure. Im thinking its the regulator, but I was wondering if there is any thing im looking past. Any help is appreciated. Thanks

-Bill