2005 titan v8 nissan

[vvrepair]

I got a 2005 nissan titan v8 with 205727mi.I don't have any codes. Cust complained that there is no power at wot. I hooked up fuel preasure gage. At idle i have 53 psi . Then i took it for a drive and in about 500 ft if i floor it my fuel psi goes to 15 psi and it does not run very good at all. At that point i can put it in neut. an it does not recover at all. My next step was the fuel pump. any ideas?? John

[Tue Ta]

any mil code set?

did you happen to check for mil codes?

[Tue Ta]

sorry did not read your post completely

the fuel filter inside the tank might be plugged (seen it a few times), have seen fuel sending unit fail on those but not the fuel pump yet

[reagd]

I got a 2005 nissan titan v8 with 205727mi.I don't have any codes. Cust complained that there is no power at wot. I hooked up fuel preasure gage. At idle i have 53 psi . Then i took it for a drive and in nissan parts about 500 ft if i floor it my fuel psi goes to 15 psi and it does not run very good at all. At that point i can put it in neut. an it does not recover at all. My next step was the fuel pump. any ideas?? John

Any other alternative solution for this? My cousin just got no power on his wot too. We are now trying to contact his dealer.