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There are many reasons a car idles fast, but one common reason is a vacuum leak. Older muscle cars have only two or three vacuum hoses, making finding the leak easy. Newer vehicles have complex vacuum systems to reduce emissions, so leaks are more difficult to find. Popular Mechanics suggests sprayi


According to About.com, there are several reasons vehicles idle low. Common reasons include vacuum leaks, carburetor problems, ignition issues, damaged power circuits and dirty fuel injectors. When a vehicle idles low, the vehicle stalls or shakes excessively when the brakes are activated, and this


Many issues prevent a car from idling, but in a vehicle with an onboard computer, the issue is often in the computer. A diagnostic scan tool provides error codes to determine the issue. On vehicles with carburetors, the issue is often with the accelerator pump.


On average, a car uses between 1/5 to 1/7 of a gallon of gas per hour when it is idling. There are different types of engines requiring differing amounts of fuel necessary to power the engine.


Depending on the type of car, idling consumes between 0.08 and 0.13 gallons of fuel every 10 minutes. Turning off a car's engine when parked for more than 10 seconds can improve fuel economy.


A car or car's engine may vibrate while idling for various reasons, including that the motor or transmission mounts have a problem. When a car is stopped at a red light or turned on in park, a noticeable vibration may occur that signals damaged or broken transmission mounts.


If a car shakes when it is idling, the cause is usually something happening with the engine, such as needing new spark plugs. The spark plugs provide an electrical arc that ignites the gasoline vapor in the vehicle to push the piston and provide power to move the car down the road. Even though the v


Possible causes of a car idling high while in park include the car having a bad accelerator, an overheating engine, the fuel pressure regulator operating at low pressure and the alternator acting up. One symptom of the car's idling problem is the driver having to apply brakes intensely when parked.


When idle, a vehicle uses about 1/5 to 7/10 of a gallon of gas per hour, while diesel vehicles use about one gallon per hour. The exact amount depends on the age and condition of the vehicle, with older vehicles in sub-par conditions consuming more fuel. Idling needlessly wastes fuel, increases main


While there are many reasons for a car to idle roughly, one of the most common is a vacuum leak. Even small leaks can cause the rough idle and illuminate the check engine light. Unfortunately the problem is often difficult to find, but once it's located, it's easy to fix. Popular Mechanics recommend