general problems of the 2005 Toyota Scion Xb

I was driving my 2005 Scion Xb . As I slowed down to stop my car accelerated right through the stop sign across the highway and into a barbwire fence. . When I applied the brakes the engine accelerated . The vehicle stability control; traction control; check engine all lit up. I got the car started, but it ran hot and started smoking and would not hold speed.

Driving about 4 miles an hour, the accelerator over powered the brake system. Rpm's where maxed even after the initial collision. With foot on the brakes and in park, the vehicle moved forward another 3 -4 feet to hit the same car again. The car will still move with the e-brake operated and full force on the brake pedal.

My Scion Xb is infrequently accelerating and lunging forward for no apparent reason from both a stationery position as well as while moving on the highway.

I was driving my 2005 Scion Xb to my office. As I slowed down and turned into a parking space when I applied the brakes the engine accelerated to 3000 rpms jumped the curb and ran into the back of the building. When I reported these facts to a Toyota dealer they said they have never heard of a car doing that and it must have been a mistake on my part. Since the repair of the car in a period of two years the engine has done this four other times the repair people say they can't fix it unless it happens when they are working on the car. I believe the problem is in the electronic controls for the accelerator. I get no response from Toyota.

On four different occurrences (6/2005 and 8/2005, 6/20,2006 and 6/23, 2006) while driving and approaching a stoplight, the car revved up and lunged forward. Car was brought to the dealership on July 3, 2006 and they could find nothing wrong.