1998 Dodge Avenger Sputtering?

Shakes or Wobbles problem
1998 Dodge Avenger 4 cyl Front Wheel Drive Automatic

Well my car, when idling, jus goes up in RPM's(like Im giving it gas)? And another thing, When I went into reverse the other day it just starting shaking and sputtering? And lastly a line is broken, Im not sure what it is(I think its the airline, for the fuel and air mixture), how do I find out exactly what it is?