• Cars & Vehicles
  • Auto Parts and Repairs
  • Car Shaking Problems
  • Toyota Camry

What causes a car to vibrate when idle?

User Avatar

Wiki User

βˆ™ 2014-06-03 22:18:09

Best Answer

If the engine mounts are worn, or the engine is not idling at the proper setting, that can cause vibration at idle speeds.

Also, your shocks/springs could be worn and that could be a contributing factor as well.

The smoothness of idling in a car depends on several aspects: first, it is very important to have the power pulses coming from every cylinder as equal as possible and produced at precise intervals. Therefore, if a given cylinder is firing poorly due to a worn, misadjusted or dirty spark plug, or a defective ignition cable, or even a defective distributor cap and rotor; will result in a shaky engine. The timing was established by the distributor in older cars, therefore a worn distributor shaft bearing can produce vibration at idle. But not only the ignition can produce unevenness, differences in carburation or injection also cause a shaky engine; thus, in a two (or four) barrel carburetor, you have to carefully adjust BOTH sides of the carburetor to avoid a shaking engine. A partially or totally clogged fuel injector also results in a shaking engine.

The valve train can also produce an uneven idle, if for example, a certain cylinder valve is sticking, or the valve lifter is not working properly, unevenness will result.

Lastly, there could be some other rare cases of rotational unbalance, like fitting a wrong type of rotational or torsional Damper. (Ford made their 302 CI engine in TWO different crankshaft configurations, so that there were TWO distinct dampers available, installing the wrong one caused vibrations specially noticeable at idle, same for the flywheels, there were two of them for this engines).

Now, with an 8 cylinder engine, almost perfect cylinder balance can be achieved, less so with 6 and 4 cylinders engines. In recent 6-Cyl engines, the idle quality is established by the proper filtering of the unbalanced pulses by the advanced design of the engine mounts, which are very important in these cases. In four Cylinder engines, some Chrysler engines use a couple of balancing shafts to counteract the unbalanced character of a 4-Cyl engine, achieving a smoother idle. If those shafts, which are driven by a chain are not properly assembled, shake will be produced.

2014-06-03 22:18:09
This answer is:
User Avatar

Your Answer


Related Questions

What causes car to vibrate when ac is running but only when in idle?

Fast idle motor is not working. This is allowing the idle to fall below the threshold of what it should be when the A/C is on.

What is the main cause why the car was vibrating when you put in reverse?

The most probable cause would be the idle control on the engine. When you put a car in gear, there is a "load" put on it (the transmission is using power) and the idle speed normally drops. The idle could be dropping to the point where it becomes unstable and causes the engine to vibrate.

What causes a car to idle good and run rough when you give it gas?

What causes a car to idle good and run rough when you give it gas?

What causes your vehicle to idle high and vibrate in park but when you are driving it is smooth?

I would look for a vacuum leak.

What causes a car to vibrate when at stop light?

loud, and shety muffler

What causes a car motor to vibrate?

could be a broken engine mount.

What causes a car vibrate at light stop?

It is idling. This is hard for an engine to do smoothly.

What causes a car to vibrate when in gear?

most likely the cv joints are finished

What causes a car to vibrate in stop light?

Could be time for a tune up.

What causes a car to idle at 500 rpm?

That is about your average idle RPM. It depends on what car you have and the age of your car. If it bothers you, i'd recommend going to a place that fixes cars.

What causes a car to jump when it is idle?

Timing belt. misfiring engine

Why is your 94 Ford Escort Wagon vibrating while you put it in reverse or drive?

check the idle speed with the car in gear, if it has a tac on the dash it should idle in gear at about 700 rpm if its too low the car will vibrate or stall.

Causes particles to vibrate in place?

the thermal energy is what causes the particles to vibrate.

Why would a cars back end vibrate at idle?

That doesn't make any sense. But if your car vibrates at idle and stand still, then you probably have a fuel delivery or ignition problem that is causing a misfire.

What causes your car to idle but not accelerate?

change your fuel filter, it could be plugged.

On a 2001 Hyundai Sonata what causes the car to idle when in park?

Because the engine is running. Shut it off or give it gas and it will not idle.

What causes cars to vibrate?

Unbalanced tires, warped rotor, bad engine mount, bent drive shaft, bent wheel, bad wheel bearings, bad U-Joint or CV joint, or your car might have a rough idle.

What causes your car to vibrate at 80 km?

The most common cause is tire out of balance or bent wheel.

What causes Altima stalls at idle with the ac running?

When the ac is running the idle should be raised to compensate for the extra load. If the idle isn't rising then the car will cut off.

What would make the check engine light come on and the car vibrate while idle?

Take it to auto zone and hav3 the codes read for free.

Why does your car vibrate and cut off when you idle?

Problem is related to idle solenoid. As you come to a stop the throttle closes. There has to be a bypass to allow air to flow into the engine. This is acheived via an idle solenoid valve located somewhere to the intake manifold and it is controlled by the computer.

What causes your car to stall while turning?

If the car is starving for fuel or air (low power at idle), the car will stall while turning.

What causes a drum to vibrate?

Hitting the drum causes the skin to vibrate and it makes a sound.

What is a sentence using the word vibrate?

Adding heat causes gas molecules to vibrate, increasing the gas volume or pressure. A car with a damaged valve will usually vibrate noisily while operating. Tuning forks are designed to vibrate and thereby create a particular pitch.

Why do your gauges vibrate when you start your car?

Cars vibrate.