If you start to notice that your Ford doesn't perform as well as it should, it's time to do some troubleshooting to figure out what might be wrong. A car that starts to accelerate poorly may have a problem in its mechanical system that is impacting its overall performance. In addition to poor acceleration, you may also find that the car handles roughly and even has trouble starting. While it's a good idea to have a mechanic check out your vehicle for problems, any one of these four common culprits may be responsible for acceleration and performance issues.