car will bounce alot if the shock absorbers are dameged or blown.
Probably bad shocks.
You could have worn out shocks or stuts
Generally, they don't make a sound. When you go over a bump, and your car keeps going "bounce, bounce, bounce" several times before it settles down, your shocks are shot. The shock absorber's job is to damp the car's springs - the springs are the real "shock absorbers". The actual shock absorber is supposed to stop the spring after the first "bounce".
Use a hand or foot to bounce the bumper on each corner of the car. Does it stop after 1 bounce (good) or does it keep bouncing 2 or 3 times (bad).
No, the suspension needs springs, the shocks are there to damp the springs so the car does not bounce up and down after it hits a bump.
An easy way to tell when your shocks are worn out is to push down on the car to make it bounce. It should stop and come to rest after about two motions. If it continues much past that, you likely need new shocks.
Bad shocks. Your springs buffer car movement, but your shocks dampen spring action. If not for shocks, the springs would allow the tires to bounce and leave the ground (or dribble).
Jump up and down on the back bumper. The car should not continue to bounce when you stop. You can also check the shocks from under the car, just above the read axle by the tires. Often when shocks go bad, you will see oil residue on the body of the shock.
Struts and/or shocks are shot.
a 2007 altima does not have rear struts. it has shocks and coil springs. if the rear shocks are bad and the car is bouncing up and down several times when you hit dips in the road or after you come to a stop your shocks could be bad and then yes it could cause you to wreck in certain situations. to test your shocks bounce the rear by pushing up and down several times real hard on each corner. after releasing the car it should only bounce 1 1/2 to 2 times before stopping. any more than this and the shocks may be bad.
The corner of the car where the shock (damper) is worn will oscillate more vigourously. Will bounce more easily (about twice up & down) when pressed down on.
Stand on the front and rear bumbers, and bounce the truck up and down then jump off. the truck should bounce once are twice. If it bounces more then that, replace shocks.