Found this on www.nhtsa.gov

Component: VEHICLE SPEED CONTROL Summary:
I WAS MAKING A 800 MILE TRIP IN MY 2005 CHRYSLER PACIFICA AND NOTICED THAT THE THROTTLE WAS STARTING TO STICK WHEN MY CRUISE CONTROL WAS DISENGAGED. THE ONLY WAY TO FIX IT WAS TO STOMP ON THE GAS PEDAL. I PULLED OVER TO SEE IF THERE WAS SOMETHING STUCK AROUND THE PEDAL OR EVEN THE THROTTLE CABLE BUT COULDN'T FIND ANYTHING. THE THROTTLE ONLY STUCK WHEN THE TAC WAS AT AROUND 2700 TO 3000 RPMS. WHEN I MADE IT TO MY DESTINATION I GOT ON THE INTERNET TO SEE IF THERE WAS ANYTHING POSTED ABOUT THIS PROBLEM. TO MY SURPRISE THERE WERE QUITE A FEW AND SOME OF THEM WITHIN THE SAME MILEAGE AND OR CONDITIONS. MOST OF THEM TOOK THERE CAR TO THE DEALER WHO EITHER CHARGED THEM FOR A NEW THROTTLE BODY OR PEDAL ASSEMBLY OR EVEN THE THROTTLE CABLE. I JUST WENT OUT AND LOOKED AT MINE AND DISCOVERED THAT A HOSE THAT CAME FROM THE CARS AIR INTAKE WAS RUBBING AGAINST THE THROTTLE SPRING AND CABLES. I LOOSELY ZIP TIED THE HOSE TO THE ALTERNATORS MOUNTING BRACKET AND HAVEN'T HAD ANOTHER PROBLEM. BUT THE HOSE WAS BEING CUT BY THE CABLE. I CAUGHT MINE BEFORE IT WAS TO BAD. *TR