Loud air rushing sound

Getting into my jeep and hit my knee on the key, and the jeep cranked over slightly, whatever. Then went to start it and it didn't go but smelt burning oil and saw smoke, so I gave it a minute to sit. I then went to start it and didn't get any smoke but just a loud air rushing noise. So I drove it around and it liked to stick just over 1000 RPMs when shifted into neutral, and when upshifting it liked to hold it's RPMs slightly. However, when I get on the gas the sound goes away. Throttle body issue?? or just a small hole in a vent tube?? Any suggestions or ideas would be greatly appreciated. Thanks

Figured it out, a small line coming off the engine had come out of its boot due to a small slice in the rubber, thanks for the suggestions.