SR throttle unsteady

[BebopSR20]

Okay here's my problem. I have an s13 blacktop with fmic, bov, boost controller, safc I, stock ecu(red top). After about 20 minutes of driving my motor starts stuttering when I press the throttle slowly. In neutral I'll hold the throttle at 2000rpm and it will jump around from 1500 to 3000rpm. If I let off, the idle will jump around and usually stall. When I floor it, the car doesn't stutter at all. The motor doesn't always stutter and sometimes it will go away and drive normally. It seems like it's running rich. I replaced the temp sensor to the ecu and that didn't help. I also tried another MAF but the problem didn't go away either. I was thinking about the TPS but wouldn't the problem be constant if that sensor was bad? Any help would be fantastic. The car is becoming a punk to drive because sometimes I have to keep starting the car at every signal. Thanks!

[[s3]]

Check for codes, then check all your hoses, looks like a vacuum leak.