hamiltonua7

Hello, I just recently purchased a 2009 audi s5 4.2l and im having some issues with it already. under load the epc light comes on and knocks it into limp mode. this doesn't happen all the time, mainly when I am merging onto the interstate. if I start out at a lower rpm and put my foot into it, as soon as it hits 4,000 rpms all power drops off. if I ease into it or take off at a higher rpm this does not happen. I am getting 2 error codes please see below
P2293 - fuel pressure reg 2
P0087 - fuel rail/system pressure too low

The car has a brand new low pressure fuel pump, both high pressure fuel pumps, and low pressure fuel sensor. Any help would be GREATLY appreciated

Grisho

Great to hear that you got this awesome car, not so about the codes though. Here is what could be helpful to check to narrow down the problem:
18725/P2293/008851 - Ross-Tech Wiki
16471/P0087/000135 - Ross-Tech Wiki

Let me know how you get on or anything else you need help with.