shaking jerking when pressing on gas
plugs or vacuum. 65;
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.
why is my car jerking
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)
It could be several things. the year make and model would need to be known for further diag. also the type of engine.
A good woman.
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.
some of the classic signs of a tranny going bad is leaking, slipping in and out of gear delayed starts from a stop where the car raises rpms before it takes off and shaking or jerking when its going into gear