Trouble getting steady boost pressure

[bleavitt23]

Hey all,
I recently set up electronic boost control on my MS2. I'm using a Pierburg valve. At 15 psi I could get a pretty steady boost pressure, but since I upped it to 18 it pretty wobbly. I turned the closed loop sensitivity all the way down. This has helped, but not fixed the issue. At 15psi I had the sensitivity set to around 260 and it was fine. Am I going to have to go into the advanced mode to get this tuned? Or is there something else I can try first? I want to get this back up to 20psi, which is where I had it with the manual boost controller, but not until I get this boost pressure settled.

Thanks,
B