It cut off on me a few days ago so we replaced the fuel pump. Today, it spitted and sputtered at me and gave me a p0452 code. I replaced the fuel pressure tank sensor and now it won't start at all. I've checked the relays and fuses under the hood and all is good. Also, now, I don't hear the fuel pump cutting on and I have a full tank but the gauge is reading empty and there's no fuel in the lines. Any help would be great.