check the recalls for the 99 Mercury Cougar!! it includes a recall on the throttle cable...
Yes, either can cause a shake while driving.
Perhaps your timing.
shake
Another word for vibrate or shake is tremble or quiver.
shake
Low pressure in the tires can cause shaking, the alignment can cause shaking also.
shake
One reason that your truck might start to shake when the gas pedal is pressed is because the tires could need to be balanced. The problem could also be your shock absorbers, or struts. * It has less to do with the gas pedal as it has to do with parts affected by acceleration.
Can be a bent wheel, tire out of balance, or worn suspension parts.
Look for a broken blade on the radiator cooling fan(s), if one is cracked, it will throw the whole fan off balance.
Fear can cause your poodle to shake intermittently. Even something as every day as taking a bath can cause a dog to shake if they are afraid of the water. Being happy could also cause a dog to shake, as could being sick or feeling pain.
to quiver or shake a lot and to vibrate