When a car sputters as it idles, this means the car is either not getting enough power or fuel. To test the problem, the driver presses down on the gas peddle. If doing so makes the car stop sputtering, there is a problem with fuel delivery. If this does not help, there is a problem with the power supply.Know More
There are many reasons why a car is not getting adequate fuel delivery. The first thing to check is the fuel pump. When a fuel pump is malfunctioning, this causes a car to sputter while idling. It is also possible that there is a blockage in the fuel lines. Although it is a less common cause, bad or malfunctioning spark plugs also cause cars to sputter frequently while idling.
The most likely causes of a power deficiency are a clogged fuel filter or a bad catalytic converter. Fuel filter cleaner and premium gas help to see if the fuel filter is clogged. To test the catalytic converter, drivers should drill a hole in the center. If air flows through the hole, this part is functioning correctly. If there is no air flow, the catalytic converter needs to be replaced.
Other less common causes of a car idling roughly include a malfunctioning distributor cap, frayed ignition wires or the ignition timing needing to be adjusted.Learn more about Car Parts & Maintenance
When a car sputters, there is usually a problem with the exhaust system. When an engine sputters, there are a number of possible causes. If a loud bang accompanies the sputtering, especially when the car accelerates, this indicates a problem with the exhaust system. One needs to inspect the exhaust and muffler for holes or blockages to determine which part needs to be repaired.Full Answer >
When a car is in drive and stalls out, it usually means there is an absence of fuel or spark, a faulty fuel pump or alternator, or some other mechanical failure within the engine itself. There are a number of methods available for testing the problem behind the stalling.Full Answer >
The effects of eco mode vary depending on the manufacturer, but in general, it makes some power from the car temporarily unavailable to enhance the gas mileage. Most manufacturers state the eco mode increases fuel economy 5 to 10 percent. These gains could also be realized by practicing more conservative driving in a car without an eco mode.Full Answer >
A flashing check engine indicator light typically means that an engine misfire is happening. This may be a minor misfire, simply affecting performance and emissions, or it could indicate a major misfire. Continuing to drive with a flashing check engine light can do severe damage to a car's catalytic converter.Full Answer >