Cruise Control problems of the 2006 Ford Taurus - part 2

Recurring - intermittent speed control problem from 2008 to present (3/1/12). Engine unintentionally accelerates when the vehicle is driven over a bump or depression in the road, especially when driven over a railroad track crossing. Once it starts to accelerate out of control, applying the break will only have a slight effect for as long as pressure is put on it, once I remove my foot from the break, the engine will continue to accelerate despite the fact that no pressure is being placed on the gas pedal; however hitting the gas pedal (down to the floor) several times corrects the problem. Engine also unintentionally accelerates when the break is applied abruptly. The only way to control the car once this happens is to apply intense firm pressure on the break and then quickly placing the car into park. The engine will still continue to race in the parked position; however hitting the gas pedal several times seems to correct the problem. I did previously attempt to adjust the cruise control buttons to solve the problem; however that had no effect. Floor mats where no where near either pedal. This problem has occurred more than a dozen times over the past 4 years. I did take it to the mechanic several times when it first happened, however the mechanic could not detect the problem and explained that they could not diagnose the issue unless it happened while they were inspecting it or test driving it.

The throttle has stuck several times. It's most noticeable around 40 mph after taking my foot off of the accelerator and applying the brake. I've had to put it in neutral when this happens, at which point, the rpms race up over 5,000. By revving the engine a couple of times, the rpms would come down to idle. Then I could put it back in drive. This problem occurs every several thousand miles or so, so it's difficult for a mechanic to assess. I've taken it to three different mechanics. I believe all of them lubricated the throttle and/or made minor adjustments. The last time this happened was over 30k miles ago. It's worth noting that my cruise control has also malfunctioned several times since I've owned the car. I bought it when it had 28k on it. I currently has about 90k miles. The most dangerous situation was when I was driving with my family down newfound gap rd. In the great smoky mountain natl park. Coming down the 7% grade, the brake pedal hardened, making it almost impossible to stop. We had to stop frequently, using stream water to cool the rims while coasting down the mountain in neutral. A recall needs to be issued for this car.

My accelerator is 'sticking' this occurred after my cruise control quit @ very low miles. My accelerator will simply act on its own. It occurs either engage in gear or not. It is total unsafe in the snow and ice environment I live. I cannot drive it in cold weather conditions for fear I will wreck or cause an accident! the factory warranty is just off.