I started to notice that when i accelerate anywhere from medium to full throttle i have a vibration feeling in the car and steering wheel. I also have started to get this code (p0087) Rail pressure low. often when i do excel rather spiritedly. It turns off after a day or so. Or i can reset it and it stays off, well until i repeat the prior. Also i noticed that after 5k RPM the boost drops to 5psi and then back up to 10-12 and back again while accelerating. Also when in D the car at stop has a Vibration but not when in P or N. NOTE. I have changed my hpfp about 20k ago due to the follower failing. Now i replace the follower every 25k with only the black center being shinny. Fuel filter about 40k ago. Really no problem when normal driving.
Maybe the LPFP?