One problem related to car will not accelerate has been reported for the 2009 Ford F-150. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2009 Ford F-150 based on all problems reported for the 2009 F-150.
Approaching an yellow light at approximately 35 mph I hit the gas pedal hard for passing gear. The accelerator stuck, the engine roaring, I had to step as hard as possible to stop the truck so I would not hit the vehicle in front of me. Engine would not stop accelerating forcing me to turn off the truck. Shocked, I sat in traffic for a moment before I restarted the engine, but it immediately went to full speed again, forcing me to again turn off the engine. My friend climbed out and pushed me out of traffic. After sitting in a parking lot for about 5 minutes I again started the engine and it started normally.