I had this same problem.
I am guessing what you mean is that the car is shaking.
If you look at your RPM's on your car you will see that it is a low lower than it normally is.
For my car it idled at around 400 RPM's ( which is very low)
Depending on your car it can idle at a variety of different RPM's
This problem started happening to me when I changed my 02 Sensor.
Solution:
Go to an auto shop and have them scan your car with one of their sensors that gives you an error code on what's wrong.
Google that code or see if they can look it up while they are there.
If it is the 02 sensor then you need to replace it.
Mine cost me about 60 bucks.
After I replaced my 02 sensor it fixed my cars idling problem.
The first time I replaced my 02 sensor is what gave my car the problem.
After I replaced for the second time it went away.
u have bad roters in front
Check the idle, crankshaft and camshaft sensors.
Your ABS (Antilock Brake System) is kicking in. It's working.
The idle is probably too low and or you need a general tune-up consisting of spark plugs, distributor cap, ignition rotor, spark plug wires, air and fuel filter. Or one of your emmission sensors are bad.
miss alignment of tires
what does idle funny mean? Does the whole car shake? (upper engine mount collapsed) Or does the engine shake/misfire? (Intake manifold gasket)
I have 98 4 cyliner automatic Toyota Camry. When I'm coming to a red light, and when I'm braking, the car begins to shake, and the shake doesn't stop even when the car is stopped. Howeverif i switch the transmission from drive to neutral, the car stops shaking. If I switch back to Drive or reverse, it car starts to shake again. What could be wrong?
If a car jerks forward while in the break position it is not the Automatic Break System but rather the transmission.
have you tried to get your wheel realigned
Can be many things. If the car is over 10 years old suspect a vacuum leak.
No, warped rotors will cause vibration when braking.
Yes they can. It can also be a vacuum leak, or defective idle control valve.