When i hit the acceleration my cougar seems to pull to tha left...

Here are some common causes and solutions to your problem.

1. wheel alignment. go to your nearest tire service center and have your wheel alignment and wheel camber checked.
2. Tire pressure. perhaps the tire pressure in your left tire is much lower than the pressure on the right tires.
3. if your vehicle is a rear wheel drive vehicle, although very uncommon, the problem can be on the differential. differential is the device that makes the movements on your wheels syncronized even during on turns.