stop lights

ive recently noticed that my 93 wagon is alil "jumpy" at stop lights.

o come to a stop i feel the car set back. then after about 10 seconds, it almpost seems like the car trys to jump forward, but i didnt let off the brake at all, this can happen 2 to 3 times at a light. about 10 secs apart i would say. id like to say that she has a mind her own and is anxious to GO but ..no, shes not makin any abnormal noises but shes does tend to shake/vibrate alot at sustained stops.

Try checking your ISC (idle speed control}It's located on the intake opposite of the TPS(throttle poisition sensor}