Hey Amy==It depends on the make, and which engine you have. I would check the bolts on the a/c compressor, and the belt for correct tension and if it is a serpentine belt check it for cracks and brittelness. Goodluck. Joe
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.
most likely the cv joints are finished
Probably a stuck solenoid.
Low pressure in the tires can cause shaking, the alignment can cause shaking also.
Yes, a loose battery cable will prevent the alternator from charging the battery. The drain on the battery is not caused by the engine not running unless an accessory is left on. Most likely, the drain is caused by accessories (radio, lights, etc) while the engine is running due to the battery not receiving its charge from the alternator and then not having enough charge left to start the engine.
This is a general that will cover most vehicles. I have found the major cause of repeat starter motor failiure is caused by the motor being energised when the engine is running. The most common cause of this problem is a faulty ignition switch, this causes current to flow to the starter motor when the engine is running. The way to test this is when the engine is running use a test light connected from the small terminal on the starter soleonoid to earth the test light should not light Good luck
If it's running, then it couldn't be raw gas. You are seeing water dripping from the accumulation of the water vapor. Absolutely normal.
Yes, bad spark pugs or plug wires can cause the engine cylinder to misfire which will cause the engine to vibrate.
missfire. probably it dont fire on all cylinders.
No. It is illegal, will cause a check engine light and running problems.No. It is illegal, will cause a check engine light and running problems.
The upper engine mount is collapsed. On the passenger side by the coolant reservoir look at the mount If you see 1/4 inch or more gap the mount is collapsed and will cause the whole car to vibrate
When vibrations from one object cause another object to vibrate, it is called resonance. Resonance occurs when the natural frequency of the second object matches the frequency of the vibrations of the first object, resulting in increased amplitude and sustained vibrations in the second object.
An engine usually has a higher idle speed when the ac is running. If the high speed idle does not operate then the ac will cause the engine to stall.
Running out of gas my certainly be a cause for the check engine light to come on. It could also be an assortment of other issues.
it cause it to vibrate!
The vibrations are called sympathetic vibrations or sympathetic resonance.
Not having one, will allow particles in and effect your engine and cause damage and cause your engine to stop running. It can also be dangerous and cause an engine fire.
This can happen when the engine isn't running on all cylinders and the torque clutch converter is engaged. Changing the engine's running parameters will cause the torque clutch converter to disengage and the transmission is then fluid-coupled which even out (masks) the engine vibration. Not sure what vehicle you have but bad universal joints in the drive shaft can also cause that.
Crank angle sensor