I have a strange issue…my car would previously boost to 1.1bar but is now stopping at 0.5bar. The car drives perfect, no check engine lights, no codes from the scanner. It pulls just as hard to 0.5bar but won’t boost past there (although the car will still continue to accel).
I did a search and know of the hoses…I have silicon ones and nothing seems loose from the main 2 up top, nor the ones under the car to the turbos.
Can someone else tell me a detailed description (pics would help!) of where else I should look or play with? How do I tell if my wastegates are stuck…or if it’s something with my DVs?
Luckily it’s a small issue, but hoping you all can direct me how to fix!

 

Yes, it's a GT650 upgrade. The rod you speak of, I assume is that long thin rod that goes from the wastegate and will go toward the rear of the car? If so, they are intact.

Are there any hoses that I could be missing other than the obvious ones I can see? Other than that, I assume maybe it's something with my wastegates or maybe my DVs...not sure if it's normal, but I do recall be able to hear the DVs "blow-off" when I'm on the car half throttle and let go. I know BOVs will do this, not sure if DVs should...it's very slight noise.

 

usually WG, DV, or loose hoses...sounds like bad DV's to me

 

do a pressure test....