One would think, just baffling it literally happened like flipping a switch, I didn't do anything or make any changes. After it cropped up I took apart the Street Demon, floats settings good, the needle and seats were fine, the seats have screens on the inlet side to help prevent any particles from getting through, no dirt or debris anywhere. Did all the other checks mentioned, and still doing it, and then with the AED. Put on the new regulator, doing iit still, swapped the gauge, and the same. Honestly thinking the mechanical or electrical pump is where the problem lies. I'll know hopefully by Friday morning!