Why Is My Car Sputtering After Getting Gas? Ultimate Explain

Your car acts up after getting gas? Poor fuel system often has a high capacity to make your car weaker and more sluggish.

A broken fuel pump, fuel filter, or fuel injector is usually the main culprit behind this scenario.

In addition, a damaged spark plug or a malfunction in the ignition system coil can cause the problem of car sputtering after getting gas.

Our writing will discuss some reasons why cars choke when trying to start after refueling at a gas station. If you want to learn more, scroll down to continue reading.

Car Sputtering After Getting Gas? Causes And Solutions

Car Sputtering After Getting Gas?

The most popular cause of car engine noises is fuel system problems.

A faulty fuel pump, fuel fuel injector, or fuel injector can cause this. In addition, a defective ignition coil or spark plug can contribute to the problem.

Although these are not all potential causes, it is one you should start looking into for the problem. Below is a list of the reasons why your car sputters after getting gas in more detail.

Fuel System Issue

Fuel System Issue

The smooth flow of fuel from the gas tank through the fuel injectors and finally to the engine is facilitated by coordinating all three key components.

The correct fuel-air mixture is created in this process, powering your car.

Since the fuel pump, filter, and injectors are all connected into one integrated system, failure of one part causes the other to fail.

This may make the motor slow down or may be damaged, leading to car sputters after filling up with gas.

Installing a temporary manual fuel pressure gauge on the fuel pressure rail and checking the fuel pressure when idling or accelerating are the simplest ways to detect the root cause.

There is a problem with the fuel filter or gas pump if your fuel pressure is too low.

In general, automotive experts recommend cleaning the fuel system, especially changing your bad fuel pump, once a year to avoid car sputters when starting after getting gas.

That said, you’d better consult your owner’s manual to determine if an annual cleaning is sufficient or if your vehicle needs more frequent servicing.

Incorrect Air-Fuel Ratio

An optimal air-fuel ratio is necessary for a gasoline engine to operate efficiently.

The worst mistakes occur when this mixture is too thin or too rich in gasoline. When this happens, the system can crash.

If the mixture is too rich, it will cool too much to ignite, and if it is too thin, there won’t be enough fuel to ignite.

It takes about 1/20th of a revolution for the charge to ignite at 3,000 RPM, 50 revs per second, or 1/1000 of 1 second.

Although gasoline is very flammable, only certain things can take place in 1/1000th of a second. Without the ignition, there wouldn’t be any energy to support the revolutions.

When you press the gas pedal, the gasoline engine gets more air while releasing the right amount of fuel.

Most modern automobiles have a throttle valve and a computer that directly regulates fuel injection.

A computerized direct-injection system gives more control over the fuel mixture, and now it’s not common for engines to have “false ignition,” which leads to an injection reaction.

A diagnostic scanner is required to diagnose the oxygen sensors.

Defective Catalytic Converter

Defective Catalytic Converter

Your car’s catalytic converter works wonders for reducing the pollution it produces.

This element transforms harmful chemicals like hydrocarbons, nitrous oxide, and carbon monoxide into less harmful ones like water and carbon dioxide.

Therefore, it is an important part of the vehicle’s exhaust system.

Suppose the catalytic converter is responsible for the sputtering engine; seek the advice of a professional mechanic to fix or replace the converter if necessary.

To sidestep expensive and long-term hazards on your car, you need to address the engine sputtering issue as soon as possible. Most of these problems will lead to an entire engine failure.

You can try to clean the catalytic converter with a catalytic converter cleaner.

Spark Plugs Issue

The need for a new spark plug, part a parcel of an engine, can also be indicated by a bang.

Spark plugs “ignite” the mixture of air and fuel in your car’s engine and transmit power throughout the vehicle. Therefore, if the pin has a problem, you may not be able to start the car.

Your spark plugs should be removed and physically inspected. If they are worn and dirty, it may be time to replace them.

Ignition coils should also be checked as they can be the source of similar problems.

Faulty MAF (Mass Airflow Sensor)

Dirty MAFs can also trigger a sputtering engine. The sensor monitors the temperature and amount of air entering the engine as part of the fuel injection process.

A blocked sensor can lead to several problems, such as poor performance and reduced fuel efficiency.

Damaged Purge Valve

The valve or solenoid opens to allow steam to enter the engine, but only under specific circumstances. If the valve is always open, frequent engine operation can be followed by many problems.

A faulty purge valve will usually cause codes and locations in the car’s PCM and set the MIL.

Before refilling, clamp the supply line to the engine to check the purge valve. Then, observe any changes in performance.

You can also remove the purge valve and try blowing through it to ensure it’s sealed and fixed in the default closed position.

Loose Fuel Cap

After refueling, a loose gas cap is another common problem, but it usually only leads to the MIL light or intermittent flashing Check Engine light and is not a real performance issue.

The problem can be solved by simply twisting the cap until it clicks. The MIL will turn off immediately when it is determined that the cap is no longer loose.

Defective EVAP

Since fuel vapors are contained inside your fuel tank and are injected into the intake/fuel in a controlled manner, the EVAP (Volatilization) system was created to protect the environment.

Raw gas inside the EVAP system may have caused the gas to splutter. Instead of crude gasoline, this system only transports fuel vapors. Overfilling the fuel tank is the recipe for this issue.

Airbags are necessary for your fuel tank to function properly. When the tank is full of fuel, excess fuel leaks from the pipes, flooding the tank and entering the engine.

Don’t try to bypass EVAP, once you’ve traveled several miles and the fuel level drops, the problem is automatically fixed. But next time, try not to overfill the gas tank.

Final Thoughts

Hopefully the article has helped you understand the cause of the 

car sputtering after getting gas and the best solution for your case.

It could signify a more serious problem, like the malfunction in the fuel system or exhaust, especially with parts that get dirty or broken easily.

Regardless of the sputtering source, you must address it as soon as possible to prevent costly and irreparable damage to your car.

Also, if the above reasons are not completely true to your situation when your car acts funny after getting gas, leave a comment below so that our team can help.

Thanks for reading!

Leave a Comment