mystery stalling...need help

[eastcoastS14]

So Ive been gone for a while but back because my car has started giving me problems. The deal is that out of nowhere my car has started stalling, engine is a stock KA and lately when I first get turn it on the car idles at about 1k...if i step on the gas the rpms go up normally but when i let off the revs drop immediately, almost all the way off and it almost stalls before bouncing back up. Also when I drive I can feel the acceleration bogging, like its being flicked on and off, the car feels choked up, if that makes sense, but only for a split second before going back to normal. Lately Ive been driving and at times ill be in 3rd gear and approaching a light, step on the clutch and it will just stall out but start right back up while its rolling. Tonight it did it as I was pulling into a parking lot...I had to restart it just to pull all the way in and then it stalled another 2 or 3 times as I was pulling into the space...I went and ate and came back out and it started up fine.

I was thinking possibly a vacuum leak? but tonight when I pulled into my driveway i could smell gas a little...seemed like it could have been coming through my heating vents but i could be imagining that ....any clues would help a lot