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Car stalls while driving – What Is The Main Reason Behind This Happening?

Car stalls while driving

One scary thing that can happen while you are cruising down the highway is that your car stalls while driving. This can be very dangerous for you, your passengers, and other cars on the road. To prevent the car from stalling while driving, you need to realize the cause of the issue and the symptoms of the car stalling while driving.

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The stalling of your engine is the slowing down or the complete stopping of the process, and the sudden stopping of the engine turning, usually brought about by various reasons. Stalling can also happen when the driver forgets to depress the clutch or change to neutral while coming to a stop. 

Reasons why your car stalls while driving


A car that stalls while you are driving is a dangerous situation no matter where it happens, even if you are in traffic or when you are cruising down the road. If it stalls on the highway, this can cause a very serious accident. There are common reasons as to why your car stalls while driving, and how to diagnose the problem and resolve the issue before it becomes more serious.

Bad battery


A bad battery is one of the most common reasons why your car will stall while driving. The car battery is the rechargeable battery that supplies the necessary electrical current to a motor vehicle, with the main purpose to feed the starter, which in turn powers and starts the engine to run your car. If the battery is dead, your car will not start. Furthermore, you might not even know that when your battery is undergoing damage or going back, it can also cause the car to stall while driving. 


When your battery is not putting forth enough power to your car, the alternator has to work even harder to keep the engine running and power the car to the right performance. When the alternator has to work too hard to turn on the engine, it can overstress the engine in the car and cause it to work harder. The stress on the engine in your car can cause the car to stall while driving. 


In addition, another reason that the bad battery can cause the car stalling while driving is that the terminals are corroded and need to be cleaned, replaced, or fixed over time. Although The battery is what powers the car, the terminals need to be cleaned and in tip-top shape to fix the voltage. The voltage needs to supply the battery, and prevent it from shorting out and causing problems. 


If you want to check the voltage on your battery and check the charge, you can easily do this with your own tool and the digital voltmeter. You can take the first step of doing this by turning off the car engine and shutting off the headlights. After this, pop the hood and connect the voltmeter to the terminals on the battery to determine why your car stalls while driving. 


After this, connect the positive clamp to the voltmeter and the positive terminal, then connecting the negative clamp to the negative terminal. If your voltmeter has a reading that is too low, like below 12.45 volts, then your battery needs to be recharged to see why your car stalls while driving. 

Fuel Pump 


The second cause of why your car stalls while driving is that there is something wrong with your fuel pump. The first time you will notice a problem with a fuel pump is that the car can stall while driving, and can cause you to not be able to restart the car. The fuel pump might show signs of why the car stalls while driving, like a slight buzzing noise while it is running. If you do not hear any noises during the fuel pump being engaged, then this is likely that you have a bad fuel pump. 


There are clear signs that your fuel pump is going bad and can be the reason why your car stalls while driving. One sign that your fuel pump is damaged is that the car will sputter at high speeds, since the engine can struggle while supplying a constant stream of fuel to the engine at the right pressure. In addition, the rising temperature of the fuel pump can cause the heat to rise, the car to stall, and the fuel pump motor to be having problems. 


In addition, the fuel pressure gauge shows how much fuel is getting to the engine, showing how much fuel pressure should be exerted when the pump is operating properly, and anything less than that is a sign that your fuel pump needs immediate attention and can cause your car stalling while driving. 

Gas with Too Much Moisture


When there is too much moisture in the gas in the fuel, it does not burn properly and can disrupt the engine performance causing the car to stall while driving. If your car is running fine until you fill up your gas tank, the problem is usually caused by moisture in the gas, which can be fixed in two ways. The first way is to drain the gas tank, and then fill it up with fresh gas that is clear of debris. The second way is to drive your car until all of the bad gas is used. 

Electrical Wiring 


If you have realized that the reason your car stalls while driving is not caused by any of the above reasons, it could be due to the bad electrical wiring. To find out if the cause is the bad wiring, make sure you check the dial speed control system in the car. Make sure that the wires are connected properly and they are not corroding or having a tough time. 

Fuel Pressure Problems


If your car stalls out while you are trying to accelerate or have high performance, like going up or down hills, low fuel pressure is the main reason why cars stall while driving. Without enough fuel pressure, your car will not be able to run reliably and consistently. Even if you have low fuel pressure in your car, your car can run normally on level ground, but when you try to go uphill or put your car through some more stress, this can cause the car to stall without enough pressure. 

Distributor Cap Problems 


The distributor cap plays a huge role in the health of your engine and the performance qualities of your car. A cap is used in order to cover the car’s distributor and the internal rotor of the car. The car’s distributor is the enclosed rotating shaft that is used in the spark ignition internal combustion engine that features mechanically-timed ignition. The main function is to create secondary currents from the ignition coil to the spark plugs in order to find the correct firing order and the cause of why the car stalls while driving. 


The distributor cap is in charge of delivering the voltage to the spark plugs. If the wiring is bad then it can throw the timing off of the spark plugs and be one of the main reasons why the car stalls while driving. The misfires of the engine are key reasons as to why the car will stall, and a corroded distributor cap can be a clear culprit.

What happens when a car stalls while driving?


Although maybe a car that has stalled doesn’t seem like the most serious problem in the world, it can actually be a very dangerous issue, especially if you are driving around other cars, like on a highway, a congested city street, or any other street with plenty of cars. But really, what happens when your car stalls while driving?  


If the car engine stalls while driving, this means that your power steering will be the first thing you notice is that it will not be working anymore. Power steering system helps the drivers steer the vehicle by changing the steering effort that is needed to turn the steering wheel, making it easier for the vehicle to turn or maneuver in specific conditions. 


When the power steering dies in your car, the wheels can still move, but it will be much harder to od. This will be followed by the power brakes and the pedal no longer being responsive and slowing down your car, making it hard to control the car and potentially causing the car to stall while driving. If the power brakes and the power steering fails as a result of the stalled engine, you can still apply the handbrake – do this and safely slide off to the side of the road. 


Depending on when your car stalls while driving, this can affect what precautions you should take. If the car stalls while driving when you are at a red light, put on your hazard lights and slowly maneuver your car to the side of the road. If you can’t move your car, then you will need to dial for help and have someone help push your car to the side of the road. 


While you are safely on the side of the road, disengage the parking brake and leave your car in neutral if your car stalls while driving. 

Car Stall Replacement Cost


If your car stalls while driving, this can mean that your engine is limited to the type of concern to the fuel, the electrical system, or the ignition. This could be that your fuel pump has too much resistance and is shutting down, which usually requires the engine to restart after cooling down. If the ignition coil is losing an electrical signal and doesn’t know when to figure the spark plugs,this can cause the engine to stall. Lastly, a faulty mass air flow sensor might detect not enough hair entering the engine, shutting off the engine and causing the car to stall while driving. 


If your car is stalling while driving, it could cost between $200 to $2500 to fix. There is no way to know how much you have to pay for the car stalling while driving until they check out your specific make, model, and year. The cost can range, depending on the cause of the engine stalling. It can be up to $500 to replace or repair the alternator, $200 to replace and install a battery, or can cost as little as $30 depending on the cause of the engine stalling. 

Stalling in Manual vs Automatic Transmission vehicles



There are different ways that your car can stall while driving if you are driving in automatic vs manual transmission vehicles. Automatic vehicles use a torque converter to manage transmission fluid and keep your engine running while you are at a stop. If the torque converter fails, the engine can stall out, since the torque converter can fail for many reasons, like dirty fluid, overheating, and problems with the stall speed. 


In order to check the torque converter as to why your car stalls while driving in automatic transmission cars, find out what your car’s RPM should be in the car’s manual, and locate your tachometer. Then, place the immobilizers behind the wheels to prevent your car from moving by turning on the parking brake. After this, press the foot brake all the way to the floor and start your engine. 


Then, change gears from park to drive, and do not take your foot off of the brake. Keep pressing the brake pedal, and then use your other foot to engage the accelerator for a few seconds, seeing if the tachometer reads lower than it should be. After this, determine if the car needs a new torque converter and the real reason why your car stalls while driving.


After you have checked your car in an automatic transmission, you need to determine why the car stalls while driving in manual transmission. 



If you have a manual transmission car, your car is more likely to stall while driving since it is with a stick shift. If you forget to engage the clutch or you switch into neutral gear without meaning to, this can cause the engine to stall while driving. The first thing that can happen when your car stalls while driving is that your car will first lose power steering and then the power brakes. Your first course of action is to apply the foot brake and steer gradually to the side of the road. 


If your engine stalls while your car is at an idle speed, then you might not be able to steer the car to the side of the road. 

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