Relevant info:

AP1. ~60k on engine. Vortech SC. AEM EMS.

Recently replaced OEM fuel pump relay. Fuel pump runs on a separate non-OEM relay/circuit.

Basically I'm driving down the road and I hear a relay click under the dash and the engine dies. There is no noticeable effect to any electronics (dash doesn't flicker or indicate a malfunction in any way). The relay clicks off then on pretty quickly so the first couple time the engine died for a split second then came back. I put the clutch in, start Pulling off the road, the relay clicks off and on and the car dies. Dash doesn't even flicker. It's not a fuel issue because it dies way too fast and I can hear my fuel pump running. I'm guessing it's a relay under the dash that's killing the ignition. Any ideas? This is my dd so I want to figure this out ASAP.

Thanks!