Hello evom

Reccently i purchased a milspec 65mm tb off a member a few months back. Ever since the install im having some idle issues. When i first intalled the tb i had a high rev on start up and some serious throttle hang issues. I adjusted the tps sensor and ran into a weird issue. When adjusted to factory calibration the car would idle low around 600rpm. Only when turned down to .375v would it idle around 1k. Today i found a huge vacuum leak (dont know how long its been there) at a vacuum cap where i deleted my egr system at the time i switched tb's. Here recently the caar has been buccking and hunting for idle speed but still idled around 1k. Once fixed the car still will not idle past 750. The only thing i havent cchecked is the biss screw. Tps is good. Could the vacuuum leak have been going on long enough to mess with my fuel trims and cause a low idle, or should i check my iacv and biss screw? Really would like to get idle right to begin tuning again. I also installed a map rev3 intake at the same time as the tb install, but the issue didnt occur until after the tb install. I installed the manifold and test drove before installing the tb, to make sure nothing was going on.