He hasn't done the alignment properly, or the steering wheel wasn't held straight ahead when he did it.
If you let it go, does the steering wheel move, or the car change direction, when you accelerate / decelerate? If so it sounds like the rear wheel alignment is out.
Take it back and ask them to do it again.
Did he check the back wheels too? It's important on a RWD car to do a full 4 wheel alignment starting with the rear wheels.
Last edited by doughboy; 03-09-2011 at 12:47 PM.