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Car Stalling While Accelerating

Experiencing a car stalling while accelerating can be frustrating and potentially dangerous. There are several possible causes for this issue, and understanding them can help you identify the problem and find an appropriate solution. In this article, we will explore three common causes of stalling while accelerating and provide remedies for each scenario.

Moisture in Distributor Cap causing Misfiring

If you notice that your car tends to stall on cold, wet mornings when the engine is also cold, the culprit could be moisture inside the distributor cap. During the night, condensation forms on the inside of the distributor cap due to cold and wet weather. This moisture creates electrical arcing inside the cap, resulting in an engine misfire. Acceleration exacerbates this misfiring, leading to severe enough misfires that the engine stalls.


To prevent moisture from forming inside the distributor cap, park your vehicle in a garage when rain or wet weather is expected. Keeping the car sheltered overnight can help mitigate the condensation issue and reduce the likelihood of stalling.

Vacuum Leak

If the stalling problem gradually becomes more frequent over time, there is a possibility of a vacuum leak. Vacuum leaks often start small and worsen over time due to pressure inside the engine. A vacuum leak can disrupt the air/fuel mixture entering the engine's combustion chambers, leading to engine hesitation or stalling.


Take your vehicle to a trusted garage and ask a mechanic to check for a vacuum leak. Specifically, have them inspect the Exhaust Gas Recirculation (EGR) and Positive Crankcase Ventilation (PCV) valves, as these components are common sources of vacuum leaks. Describing the symptoms and information you gathered about the issue will help the mechanic diagnose and address the problem more effectively.

Bad Throttle Position Sensor

If the stalling problem has remained constant and hasn't worsened over time, a faulty throttle position sensor may be the cause. Throttle position sensors measure the extent to which the gas pedal is depressed, providing this data to the engine's computer. The computer uses this information to calculate the appropriate fuel injection amount. A malfunctioning throttle position sensor can disrupt the fuel injection process, leading to stalling during acceleration.

Throttle Position Sensor


Visit a reputable garage and have a mechanic examine the throttle position sensor. Explain to the mechanic the symptoms and details of the issue, including the possibility of a faulty throttle position sensor. Providing this information will help the mechanic understand the nature of the problem and facilitate an accurate diagnosis.


Experiencing a car stalling while accelerating can be a frustrating and potentially dangerous situation. However, understanding the potential causes and remedies for this issue can help you address it effectively. Whether it's moisture in the distributor cap, a vacuum leak, or a faulty throttle position sensor, consulting a qualified mechanic is crucial to diagnose and fix the problem. By communicating the symptoms and information you have gathered, you can assist the mechanic in resolving the stalling issue and getting your car back on the road smoothly.

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