Looking for advice on a weird sound my fuel regulator makes. This video does not do it justice, but have a listen. I put the phone besides the fuel regulator (when video is dark) and you can hear a fast paced pulse/knock. It’s coming directly from a robbmc fuel regulator. You can feel it strongly when you put your hand on it. I have a 1/2 line going in and 5/16 return line. Any ideas on why?
Also when motor shuts off, you can hear some shreaking coming from the regulator for a couple seconds.
https://youtube.com/shorts/R2_jxBZA9...XxUvUp09yxl0Sx