Leaps Forward During Idle on 2000 Jeep Grand Cherokee

I have a 2000 Jeep Grand Cherokee. When I come to a complete stop. After about three minutes. The car wants to leap forward while my foot is on the break. This only happens during long idle periods.

Asked by for the 2000 Jeep Grand Cherokee
It sounds like your idle system has a problem. THIS IS SERIOUS< you could run some one over. Take it to a good shop ASAP>
1 more answer
check your tps (throttle position sensor) this also happens to me in my 2000 4.7. does it usually happen after long driving periods? Does your rpm gauge bounce up and down?