2000 Jaguar XJ Vehicle speed control Problems

“The car is:Jaguar year 2000 xjr 4.0l, w/supercharger with. I was driving on the pennsylvania turnpike at the speed limit when suddenly the engine started running at slow idle speed. The engine speed would not respond to the position of the accelerator pedal. I was told later by progressive auto repair in hamilton va that the problem was that the accelerator pedal position sensor had failed and had to be replaced. I was told that this was attached to the throttle body assembly and could not be bought separately from the throttle body assembly. …”

“No events leading up to failure. No warning lights or prior indication of any problem. Car shut down at interstate speed with no warning. Had to get over 2 lanes of traffic and out of harms way and pull off of interstate. Very dangerous time. Replaced body throttle and charged me $1,563.17 + labor. Old part is available. I was very shaken up after this incident and very concerned that you could just be driving down the interstate and with no warning at all your car would just shut down. This is extremely dangerous. …”

“The contact owned a 2000 Jaguar xj8. The contact stated that he frequently experienced unwarranted vehicle acceleration. When the failure occurs, the RPM's increase to 4,000-6,000. The risk of a serious crash was significantly increased. The dealer could not duplicate the failure or produce any error codes to provide a sufficient remedy. He took the vehicle to an independent repair shop and the mechanic located an evaporated system fault error code; however, no repairs were made. The manufacturer would not assist. The failure and current mileages were 92,500. Updated 03/23/09. …”