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 is an indication of a serious engine problem. Diagnosing low idle issues requires checking the carburetor, fuel pressure regulator and fuel injectors.Know More
Underhood Service states that low idle issues are only a symptom of a more serious problem. A diagnosis of a low idle issue is achieved by checking various parts of the engine. A common issue associated with the carburetor is air problems. This issue occurs when the carburetor does not open properly to allow air to enter. Underhood Service explains that another issue that causes low idle is vacuum leaks. This type of leak occurs when the vacuum line is not securely attached or there are bends in the line.
Additionally, dirty fuel injectors can cause vehicles to idle low. The fuel injectors are normally set to equal specifications; however, there are factors that directly affect the injectors. About.com notes that, when the fuel injectors test at different levels, they are malfunctioning and require cleaning or replacing. The site recommends repairing low idle symptoms immediately before the issues cause irreparable damage.Learn more about Car Parts & Maintenance
Ignition Interlock devices are devices that measure the alcohol content in breath and allows the driver to start the vehicle only if the alcohol content is less than the set value. The drivers can face ignition interlock problems mainly because of not complying with the timely servicing of the device.Full Answer >
The main causes of wobbly steering when driving at low speeds are problems with suspension systems, unbalanced wheels, damaged wheels or damaged tires. Some of the problems indicate a serious issue that should be addressed immediately.Full Answer >
Idle speeds vary from car to car, but for a passenger car, typical idle speeds are between 500 and 900 rpm. This idle speed also depends on the accessories that are currently running as a car's idle control system will automatically raise the idle in order to provide power for auxiliaries such as air conditioning and power steering.Full Answer >
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.Full Answer >