[blackrosenova400]

If its going around the diaphragm, then the regulator is junk. My cavaliers regulator was bad, didn't know it. it was leaking fuel into the vacuum line and was flooding my motor. So badly the it clogged my catalytic converter and my engine wouldn't run, lol. figured it out by pulling the o2 sensor on the exhaust manifold to let it breathe.

Pretty sure the stock fpr return orifice is too small and will not flow enough to control a large amount of flow. And maybe if the regulator is old enough, it bursts the diaphragm or causes a leak. Either way there should never ever be fuel in the vacuum line.

I ran a 255 with the stock regulator the very first time I installed it to test it. Fuel pressure I think was 5-7 psi higher than it should have been. never saw fuel in the vacuum hose.