So a code came up today for fuel pressure regulator or something. But I replaced my fuel pressure sensor less than a year ago I replaced it right before winter. But it looks like this issue only happens when it's hot outside like 75°F+ I plugged in my code reader bc my car is loss power or stall and it happened right when I looked at my reader and it said my fuel pressure dropped to like 10psi then after it stopped it jumped right back to 43-50psi kinda seems like it does it a little randomly some times when I gas it but some times when Im just taking a normal turn or driving normally. And help on this would be much appreciated like I said I have replaced the fuel pressure sensor so what could be causing this and why will it only happen when it's hot outside it never happened during winter when when I'm beating the absolute **** out of it

 

Fuel gets thin when hot - your fuel pump may not be delivering the correct pressure. Have you put an actual gauge on it to measure? (and verify your fuel pressure sensor is reporting the correct pressure?)

 

I have not bc I don't have anything to do it. But I was looking at purge valve or something bci just got gas and when I took off my gas cap to put fuel in it it had a big suction noise like there was alot of vacuum in the tank. But I'll look up what I need to see about the fuel pump and try to check that out

 

There is a schrader valve on the fuel rail with a green or gray cap on it. This is where you would manually check pressure with a gauge that you can usually get at an auto parts store for fairly cheap(<$20). I would check that before buying any parts. The fuel doesn't return to the tank on these cars, so a little vacuum is normal.