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
One major cause of antifreeze leaking in a car is a damaged or worn radiator. In time, radiators can become corroded and prone to holes or cracks.Full Answer >
The most common cause of vehicle whine is a loose or worn fan belt. This could be the result of a loose tension wheel or simply the belt itself being old and losing its elasticity.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 >
Flooded cars can be partially repaired, depending on the extent of damage and amount car owners or car dealers want to spend. Cars exposed to flooding and water damage suffer considerable damage to vital mechanical and electrical components, as well as their interiors. Fixing water-damaged cars involves extensive repairs, such as re-upholstery, replacing lights and reviving the engine and electrical systems.Full Answer >