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.Know More
Fuel injectors become dirty and stop operating normally over time. Varnish from gasoline closes the orifice in the fuel injector, so fuel is no longer able to pass properly. If fuel filters continue to foul after cleaning, the problem often stems from a fuel tank with accumulated debris from cheap gasoline.
Problems with plugs, plug wires and spark plugs also cause cars to stall. If the plugs are new but the car continues to hesitate, the problem is likely in the plug wires. If replacing both plugs and wires does not cure the situation, it is likely in the ignition system.
Most newer vehicles have onboard diagnostic systems. Under normal circumstances, the hesitation upon acceleration causes the check engine light to illuminate. The diagnostic system stores a code indicating the cause of the stall. Have the problem checked using a scan tool. These systems prevent the unnecessary replacement of parts in order to troubleshoot a problem.Learn more about Car Parts & Maintenance
Dirty fuel injectors or vacuum leaks can cause a car to hesitate when the gas is pressed. It can also be caused by low fuel pressure.Full Answer >
Engine hesitation can be a result of low fuel pressure, vacuum leaks, worn or dirty spark plugs or bad spark plug wires. A weak ignition system can lead to misfiring, which can also cause hesitation.Full Answer >
A loose or slipping engine belt or a misaligned accessory drive pulley could cause a car to squeal upon acceleration. Engine belts and drive pulleys are used to power the water pump, air-conditioning compressor and the alternator of an automobile.Full Answer >
The most common signs that a transmission is slipping include the revolutions-per-minute gauge being above 3,500, the car taking too long to coast or a delay in acceleration. Common causes of a transmission slip range from poor cleanup to defective parts.Full Answer >