Bad o2 or maf sensor
shaking jerking when pressing on gas
plugs or vacuum. 65;
why is my car jerking
When the air conditioner comes on, which includes turning on the defroster at low temeprature ranges, it draws a lot of power from the engine. This can result in a decrease in idle speed and less available power on starting off from a start. This is often felt as a shaking or jerking. It is possible that the idle is low or that there are problems preventing full power.
Idle needs to be re-learned properly
Yes. A disconnected vacuum line will cause the engine not to idle at a constant rpm, therefore causing the car to shake.
Is the car running ok? If yes and its only the vibration that's an issue most likely cause is motor mount(s)
A good woman.
It could be several things. the year make and model would need to be known for further diag. also the type of engine.
this car is known to have an appearance of a rough idle even when everything is fine and a history of short-lived motor mounts
Idle air control actuator is probably bad.
no because your car can die or the transmission might slip. you can have a clogged Fuel Injectors , your fuel filter can be dirty and need to be replaced. In so rare cases if your car is jerking to hard it can resulted in a bad transmission.