Vibrating sound when the car is idling - 1999 Chevrolet Cavalier

Tune up for the idling, check for vacuum leaks. Replace the fans first, sounds like are going bad.

Sounds like a bad spark plug, spark plug wire. Probably the spark plug wire. They usually act that way when load is applied. It may misfire under light load and not at idle. Try plugs and wires.

i would recommend getting exhaust hangers checked at exhaust shop,sounds like exhaust is touching when it is in gear

how many miles on it? how long have you had it? it sounds like the ICS sensor . that is idle control actuator it is on the thottle body

Sounds like it is missing badly and would not be so noticeable when running. Have you had it tuned up lately? Could be wires and plugs need replacing. Also if you have a lot of miles on the engine the compression in the cylinders may be low. Two possibilities.

sounds like exhaust system is grouding against the frame

Check to make sure both headlights are tight,,,when it rattles at idle go feel the headlight and hold it and see if the noise and vibration goes away,sometimes the headlight has too much clearance and causes a massive vibration,,if thats not it try...loosening all the motor mounts and rock the car back and forth and them retighten them,it reseetles the mounts and sometimes fixes the issue,,also check the lower engine and trans mounts for wear.

1) It is very possible your engine mounts can be worn, but

2) the vibration you feel may be also due to the idle itself degrading to the point that the car is shaking. Does the engine sound like it is getting ready to die? what is the engine rpm when you feel the vibration? You may just have a dirty throttle body. In this case, clean the throttle body plate and bore and the problem will go away.

3) did the problem seem to come on suddenly or gradually, if gradually, you may just need some plugs and/or wires, and/or cap/ignition rotor, etc. (a tune up)

4) Also, do you only feel the vibration when the AC system is on?

5) there are some other reasons for abnormal engine vibration at idle, but the above are some of the most common, and simpler to repair.

All the best with the repair!

sounds like it has a bad motor mount, once the rubber wears out, it is metal to metal and there is nothing to coushin the vibrations from the engine.

you may have a pulley out of balance. ie harmonic balancer, steering pump, alternator. try increasing idle, set it at 850-900.