I have a new fuel setup that started off running just fine, that is, it ran in the garage and around the block a few times for a about an hour total running time. Then all of the sudden the fuel pump started shutting off or not producing enough pressure, not sure which. I've pin pointed the issue to the voltage measured at the pump. Here's a quick run down of my setup and the tests i ran.

Setup:
- Aeromotive A1000 pump
- 10 AN feed to filter/pump, 8 AN feed to fuel rail, 6 AN return line
- Fuel: Methanol
- Painless fuel pump relay kit

Tested turning the ignition ON which would relay ~12v to the pump for 2 sec:

1. With everything hooked up and plugged in, turning the ignition ON registered only ~5v at the pump terminals.
2. Removed the relay kit, still only got ~5v. (in both these tests the pump sounds like it tries to turn)
3. Measured the wires both with and without the relay kit installed this time NOT terminated on the pump (so open wire) and got the expected 12v output for 2 sec.
4. Drained the fuel entirely out of the system, terminated the wires back on the pump and got 12v output. (pump turns like normal)

So what's causing the voltage drop? Am I getting pressure bounce? It's driving me crazy because it was running perfectly over a several week span and about an hour + of running time.

I'm using an AEM fuel pressure regulator which I'm not sure is bypass-style. Does anyone know if it is?

I've been able to start the car a few times since this started but it doesn't take more than about 20 sec for the car to stall. And I think it's because of the pressure dropping.