Installed the S280 a few weeks ago and we're not able to push it past 15-16 PSI (Tune+). Got ~18 in second once. Solenoid is routed correctly and everything seems tightened down. Just checked the preload on the wastegate. Any other thoughts on what it may be? Diverter valve (using GFB DV+), loose hose I missed.. I also broke the solenoid on install and ordered a new one - hoping there's not something wrong with that.