[sam.335is]

hey guys, i’ve got 2 issues i need some assistance in figuring out. i’ve got a 2012 335is and am a highschool student so i really can’t afford to throw the parts store at it to fix something. 2 days ago my rpm was rising to 800 after getting warm. when the rpm raises to 800 at idle, the fuel rail pressure goes to 2000-2300 psi and drops down to 700 after a couple seconds, it also makes the injectors sound crazy. notes about the car new coils, new plugs, new idler pulleys, rb pcv valve, no mods, 85k miles, and index 12s. i’m thinking it’s possibly fuel pressure regulator but i’m not sure.

2nd issue, the car kind of jolts forward when letting off the throttle abruptly at low speed low rpm, motor mounts, dct/ clutch issue?
hopefully you guys can help me considering the fact that i’ve seen no forums posts talking about this issue. thanks in advance!