Eratic idle and slight stutter through powerband

[GSTDoIt]

Attatched are two vids of my problem. First off is the idel. Recently the idle has been quite eratic. When your first start the car, the idle is perfect. It doesn't seem to be untill you turn off the car and restart it that the idle gets the way it does in the vid

The second problem is that the car stutters slightly under load. You can sorta see, but mostly hear how it kinda stutters in the vid. You can hear it sort of "pop". Mods are in my profile. The car was street tuned about 2 weeks ago, though it was doing this before the tune. If you have any further questions, please let me know what other info you need to help me diagnose the problem. Thanks.

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[missouri_dsm]

do a tune up on your car and check for boost/vacuum leaks.

 

[GSTDoIt]

Well about 7 months ago, the spark plug wires and plugs were replaced with the specified NGK stuff. I'll check again for boost leaks/vacuum leaks, but I just did that about 2 weeks ago, though I realize things move/get loose, so I'll check that first.