Hey guys, so a while back I bought a 18psi stage 1+ tune from Unitronic for my 2003 1.8t passat. I definitely felt the power then but my car felt a little weaker about a month later. It wasn't till I bought a boost guage that I found out I wasn't running 18 but around 15psi. I checked for boost leaks got a upgraded diverder valve, and it didn't really make any difference. I started hitting 18psi again when I reset the ecu by disconnecting the battery but then it went back down. Could it be in limp mode? Any specific sensors I should check? Much appreciated!