Hi. I have a problem when I accelerate. The car is vibrating like crazy so I figure I need a wheel alignment. My problem is when I pushon the gas pedal to accelerate the car makes a rattling noise and I have white smoke coming from my exhaust pipe. The car only makes the noise when I press on the gas pedal to accelerate. I know I may need a new exhaust since I am getting the white smoke from the muffler but unsure of the rattling noise.