You usually hear this noise when accelerating the vehicle. Most people call this a pinging or rattling sound. This noise is caused by an air/fuel mixture in the engine cylinder being ignited prematurely by the heat of compression as the piston is moving up on the compression stroke.
So, why does my car wobble when I accelerate?
The most common cause of vehicle wobbles in this speed range is a bent wheel or mildly out of round tire. The most common cause of vehicle shakes at 50 mph or higher is tire balance. Again, transmission or drive lines can cause this, but the tires should be the first thing to have checked.
What would cause a car to hesitate on acceleration?
If a fuel pump cannot provide the correct pressure, fuel may have difficulty making it to the engine. A vehicle that hesitates while accelerating or while driving up a hill may have a weak fuel pump. Dirty fuel injectors may cause the engine to run lean which will in turn, cause hesitation when accelerating.