If a car shakes when it is idling, the cause is usually something happening with the engine, such as needing new spark plugs. The spark plugs provide an electrical arc that ignites the gasoline vapor in the vehicle to push the piston and provide power to move the car down the road. Even though the vehicle is just idling, it takes power to keep the engine running smoothly.Continue Reading
A wire gauge allows checking the spark gap, when installing new spark plugs. Improperly gapped plugs are sometimes the reason behind the rough running vehicle. The operator's manual for the vehicle provides information on the gap to use.
Prestolite Wire recommends visually checking plug wires while the engine is running to look for any arcing. With the engine off, it is possible to check the condition of insulation, boots and to look for burn marks. All of these are potential causes of the rough idle.
A dirty air filter starves the engine of air. Filters are generally inexpensive and easily changed. Auto manufacturers include recommendations for the interval to change filters. However, operating the vehicle in dusty conditions reduces the time between changes.
With a dirty fuel filter, the vehicle does not receive enough fuel to operate smoothly. Other potential causes of fuel problems include a defective fuel pressure switch or a defective fuel pump.Learn more about Car Parts & Maintenance
A car igniter is a component in the car's engine that is responsible for sending a signal from within the distributor to the ignition coil, making the spark plugs fire. It is also known as the ignition control module.Full Answer >
When a vehicle stalls in any gear, it's generally a problem with the amount of fuel, amount of air or electric spark getting to various parts of the vehicle's engine. An occasional stall while in reverse doesn't necessarily mean there is a problem with the vehicle, though repeated and frequent occurrences may warrant investigation by a mechanic.Full Answer >
If an engine stalls upon acceleration, one likely cause is a dirty fuel filter. Not replacing the filter according to the manufacturer's recommendation allows debris from fuel to build up and plug it. This causes the car to operate on a lean fuel supply and render it unable to meet the demand of pressing the accelerator pedal, according to Carsut.Full Answer >
CarsDirect.com explains that when a vehicle shakes as it slows down and the brakes are applied, worn brake rotors or unevenly worn pads are likely culprits. According to the source, excessive wear on the rotors and the amounts of heat generated during braking alter the shape of the rotor turning a normally flat surface into one with smalls peaks and valleys.Full Answer >