There's a few threads on this issue. Here's the most recent: 2018 PF SV-Tech abrupt loss of power under hard...My 2014 Pathfinder falters when accelerating but only when the gas tank is less than 1/2 full. Probelm worsens as fuel level goes down. Fuel Mileage is down also. Thoughts? I'll be researching how to test the fuel pump but in the meantime thought i'd reach out.