When your car stalls while driving, there are numerous reasons why this could be happening. And, depending on the reason why it happened, you might be able to fix it easily on your own, or you might need to take it into the shop. In either case, here are some of the most common reasons why your car stalls while driving.
One reason your car could be stalling while driving is due to a vacuum leak. A small leak can cause the engine to run lean, which means there’s not enough fuel being drawn into the cylinders. This can cause the engine to misfire and eventually stall.
Due to the need for a perfect ratio of fuel and air in the combustion process in colder weather, problems of this kind are frequently most obvious when the engine first starts.
To check for a vacuum leak, start by inspecting all of the hoses and gaskets that connect to the intake manifold. If any of them are loose or damaged, they’ll need to be replaced.
Failing fuel pump
One of the reasons your car may stall while driving is due to a failing fuel pump. The fuel pump is responsible for delivering gasoline from the tank to the engine, and if it’s not working properly, the engine can’t run. Similarly, low fuel pressure or leakage of fuel attributed to faulty ful pump also causes the car to stall. Other signs that your fuel pump may be failing include: your car taking longer to start than usual, loss of power while driving, or uneven engine idling.
Faulty ignition coil
One of the most common reasons a car will stall while driving is due to a faulty ignition coil. When this component malfunctions, it prevents the spark plugs from firing correctly, which in turn causes the engine to misfire. As a result, your car will lose power and eventually stall. In some cases, you may be able to restart the engine, but it will likely stall again soon after. If you’re experiencing this problem, it’s best to have your car checked by a mechanic as soon as possible.
Faulty coolant sensor
One of the most common reasons a car will stall while driving is due to a faulty coolant sensor. The coolant sensor is responsible for sending a signal to the engine control module (ECM) that lets it know the engine has reached the correct operating temperature. If the coolant sensor isn’t working properly, the ECM won’t receive this signal and will cause the engine to stall.
Clogged Throttle body
One common reason your car might stall while driving is a clogged throttle body. The throttle body is responsible for regulating the amount of air that enters the engine. If it becomes clogged, it can cause the engine to stall. To clean your throttle body, you’ll need to remove it from the car and clean it with a solvent. You can usually find instructions on how to do this in your car’s owner’s manual.
Failing timing chain or timing belt
One of the reasons your car may stall while driving is due to a failing timing chain or timing belt. If these components fail, it can cause the engine to misfire or lose power, leading to a stall. In some cases, you may be able to hear a rattling noise coming from the engine before it stalls. If your car stalls while driving and you suspect it’s due to a failing timing chain or belt, have it towed to a mechanic for repair.
Low transmission fluid
One reason your car could be stalling while driving is because of low transmission fluid. When your car doesn’t have enough transmission fluid, it can’t properly lubricate the engine, which can cause it to overheat and stall. This is usually caused by a leak in the transmission system, so it’s important to get it checked out by a mechanic as soon as possible.
Water in Gasoline Issue
One potential reason your car could be stalling while driving is water in the gasoline. If there’s water in the gas, it can cause the engine to misfire. The engine misfiring can then lead to the car stalling. Water can get into the gas tank in a number of ways. One way is if the gas cap isn’t tight enough, allowing rainwater to seep in.
One of the most common reasons a car stalls while driving is because of a dead battery. If your battery is old, it may not have enough power to start your car. Another possibility is that your alternator isn’t working properly and isn’t charging the battery. This could be due to a loose connection or a problem with the alternator itself. If your car stalls and you suspect it’s due to a dead battery, you can try jump-starting it.
Choked Air Filter
One possible reason your car is stalling while driving could be a choked air filter. If your air filter is dirty, it can restrict the amount of air flowing into the engine, which can cause the engine to stall. Another possibility is that the fuel injectors are clogged. Over time, deposits can build up in the injectors, restricting fuel flow and causing the engine to stall. If either of these is the case, you’ll need to have your car serviced by a mechanic.
Clutch release problems
One of the reasons your car may stall while driving is due to clutch release problems. When the clutch pedal is depressed, it should release the pressure on the clutch so that it can disengage. If there is a problem with the release, it can cause the car to stall.
Bad distributor cap
One reason your car might stall while driving is a bad distributor cap. The distributor cap is responsible for distributing the electrical current to the spark plugs, so if it’s damaged, the current can’t reach the plugs and your engine will stall. A corroded distributor cap might cause engine misfiring, decrease in power or acceleration and decreased fuel economy.
Faulty Mass Airflow Sensor
One of the most common reasons a car will stall while driving is due to a faulty mass airflow sensor. This sensor measures the amount of air flowing into the engine and tells the computer how much fuel to inject. If it’s not working properly, the engine can get too much or too little fuel, causing it to stall.