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How to Adjust a Car Idle As cars get older and accrue more mileage, the idle speed of an automobile may be higher or lower than it needs to be, either wasting precious fuel or causing the car to stall out. Adjusting your idle is relatively easy, with the same basic procedure for any car. However, be sure to check the specifications for your car before doing any of your own maintenance. Things You'll Need Screwdriver Instructions Start your car and allow it to cycle through at least one period of going through a higher RPM rate. This will ensure that the engine is completely warmed up and you will be able to adjust the idle properly. It is important to allow the engine to warm up because you will be driving your car mostly at that condition. While the engine is warming, you can pop the hood of your car and prop it open. Locate the throttle body. You can recognize it by tracing your air intake hose as it exits the air filter. The next part that the air hose...

High Idle Causes A high idle in your car can cause you to worry. When the engine seems to rev up on its own while you are at a standstill, you may wonder if it's a sign of trouble that needs the attention of a mechanic. The answer to that question depends on the cause of the high idle. Some causes are harmless, while others can indicate the need for a repair. Faulty Fuses Most modern car engines control the engine idle speed through a motor called an IAC (idle air control) motor. One of the leading causes of IAC motor malfunction is a blown or faulty fuse. A malfunctioning fuse in any of the electronically controlled components including the air bag system can disrupt the function of the IAC motor and lead to a higher idle speed than usual. Computer Malfunctions Computers control a modern car's engine and transmission, its brake system and its airbag system. If the fuses are fine, the computer system itself in one of these components might be malfunctioning....

How to Rewire a Car Lighter Adapter Plug Portable electronic appliances typically come with 12-volt adapters and patch cords that enable such appliances to be used inside vehicles. In the United States, production of 12-volt automobile plugs is standardized under "UL standard 2089," which covers plugs and patch cords that insert into cigarette lighter receptacles. A 12-volt car lighter adapter plug is easy and convenient to use, but can sometimes become defective due to abuse or misuse. If you know how to rewire a defective car lighter adapter plug you can save yourself some cash. Things You'll Need Diagonal pliers Wire stripper Soldering gun Solder wire Instructions Cut the cord attached to the lighter plug about 2 inches below the plug, using diagonal pliers. Remove about 2 inches of outer covering from the tip of the patch cord, using diagonal pliers. Strip off 1/2 inch of insulation from the tip of the two inner wires (positive and negative), using a ...