Accelerator Stuck problems of the 2008 Ford F-250

While driving on a local highway at approximately 60mph, the truck instantly "took off", the tachometer went to between 5500 & 6000 rpm, and speed increased tremendously to almost 90mph. I tapped on the accelerator pedal and the brake to try to interrupt what was occurring. I placed the vehicle in neutral, where the rpms dropped to 3000. I turned the truck off in hopes of resetting whatever had just occurred. When I started the truck back up, it immediately began doing what it was doing before. I placed the truck into "drive" and attempted to get out of the roadway. At this time, everything returned to "normal". I took the truck to the local dealership (university Ford, durham nc). They determined within 40 minutes that it was the floor mat. However, I have tried for more than an hour today to recreate a floor mat accelerator sticking without success. I have also been unable to recreate the maximum rpms that I experienced with my foot in a normal driving position. This is the first and only occurrence, but I do not agree that it was a floor mat problem or that my issue was taken seriously. The service rep (kenneth) advised that the truck did not provide any computer codes indicating a problem, so there was definitely nothing wrong with the truck other than the floor mat being out of position.

My 2008 Ford F-250 super duty has a gas pedal that sticks to the floor making you go full throttle. This has happened so often that I am used to throwing the truck into neutral to stop from hitting people and then kicking the gas pedal until it releases. The dealership says they find nothing wrong that they can fix, they think the carpeting is catching the pedal.