I also ran power straight off the battery... only 20 psi
bunk pump
bunk pump
bunk pumpEp381 pump, 3/8 feed and return 600hp kit. Afrs stay pretty close to 13.5. Feels like it runs ok.Remind me what you're running for fuel delivery and FiTech model? Have you been monitoring AFR's?
What feed and return line. What filter(s)?
Your gonna pull the tank. If it's not a bad pump, the pickup tube may be jackedPre and post filter 20psi.
K&N fuel filter?

Woop woop party timeAs bent mentioned. I wouldn't be surprised if a line came lose in the tank or something is up with your sock filter. Either way you're dropping your tank.

Not sure where I'd stick a second oneRun em both