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The Causes of an Idle Surge Fluctuations in engine idle speed can be annoying and may even cause stalling at idle. Engine stalling can be dangerous, because power assistance is lost to the steering and brakes. Idle speeds below those specified by the manufacturer will affect the performance of the power steering pump, alternator and AC compressor. Emission control devices also require a minimum engine speed for effective operation. Surges that accelerate engine speed could cause unexpected vehicle movement. Air Supply A clogged or obstructed air filter can cause surging at idle, and foreign objects can enter the filter housing at any time. Any debris in the filter or housing might restrict air flow to the engine enough to affect idle speeds. Clean the throttle body or carburetor venturi(s) after replacing a severely dirty air filter. Aerosol products designed for this purpose are available at any auto parts store. Instructions for use are on printed on the can. Fuel Sup...

How to Fix the Accessory Power Outlet in a Car Current technology has transformed a car’s accessory outlet from a mere cigarette lighter to a vital piece of the commuting puzzle. Paper maps have gone the way of cassette players with the advance of global positioning satellite navigation units and mapping applications on cellular phones. These 12-volt sources now power devices that provide navigation, traffic updates, weather conditions and emergency communication capabilities making car travel safer and more comfortable. Determine If the Outlet Is Bad Try a different accessory with the outlet. If the second accessory does power on, the problem is the original accessory and not the outlet. If both accessories fail to turn on in the outlet, the outlet is probably the culprit. If this is the case, proceed with further troubleshooting steps to determine the root cause of the outlet failure. Check the Fuse Accessory power outlets are protected by a fuse in a fuse block. It is ther...