So I knew i had a bad wastegate, was spiking to 11lbs. Changed it out but still have this other remaining problem. Starting out in 1st gear if i go WOT no issues, but once im in 2nd or 3rd anytime i try to accelerate about 1/2 to 3/4 boost the car bucks and hesitates until i let off. It is building boost fine but the power just isnt transferring. I AM thinking i may have a vacuum leak, boost gauge only shows 4hg at idle. So either the gauge is not working properly or i have a severe vacuum or boost leak somewhere. I made my own boost leak tester, still cant seem to find it. Also changed out any vacuum lines i was able to get to with new ones. I do have a CEL on, downstream o2 sensor, but i think this is due to the non-fouler trick i have not working properly. Any tips? I dont wanna throw random money i dont have at something if its not the problem. Thanks.