i recently installed a MAP o2 eliminator downpipe, greddy catback, walbro fuel pump (255), 1 step colder spark plugs, an aem truboost, aem uego af/r, and oil pressure gauge. i am also tuning back and forth with mellon racing, so i have flashed my ecu.

when tuning the boost, i was able to hit my goal of 25 psi after trial and error with the duty cycles, however the wastegate keeps opening and closing at high boost (it'll build, the wastegate opens, closes, turbo rebuilds, repeat). i know to tune it to ~3-5psi below your desired boost, but even having done that i'm still running into troubles. i was wondering if anyone else has worked with this type of problem before and can offer insight?