Driving today. Been running GMS1 map (19psi) and all stock except for K&N drop in for the past few weeks because I had been planning to go to the dealer and seeing if they would check out the slow oil leak around the fuel pump TSB. Was shifting From 2nd-3rd fast but not WOT and check engine light came on. Car won't boost past 12psi. Was about an hour away from home so I took it easy and kept it out of boost on the highway. Seemed to kind of run like crap but not too bad. When I got closer to home I tried flooring it in 3rd for a moment and still about 12psi max.

Got home, checked the code and it had P2187 twice (using ezflash). Searched here a bit and found tons of different opinions for the cause. This is not the P2178 code. One of the threads I found said to do a boost leak test. So I did it at 25psi (because I also have a Trifecta 23psi tune).

If I put air in the system, it doesn't hold. It leaks out. I can hear it but can't find it. Tried spraying soapy water all over the air piping path. I swear it sounds like it's coming out under the alternator. ???? Just can't see under there without removing a bumper, tire and fender well.

I used the PVC DIY pressure tester where the hotside CP starts at the turbo.

I guess I'll take it to the dealer. Just thought I'd post up and get any of your thoughts.

Thanks.