6 Symptoms of an Engine Misfire (& 7 Common Causes)

The engine of your car is one of the most important parts of your vehicle. It’s responsible for powering you and your passengers around, providing you with a means of transportation, and protecting you from danger. But, if your engine misfires, it could cause serious damage to your vehicle. In this post, we’ll show you what to look for if you notice any of these symptoms of engine misfire, and we’ll also show you how to diagnose and repair an engine misfire.

When a vehicle’s engine misfires, it can cause a variety of problems ranging from a loud, grinding noise to an inability to start the engine at all. In this article we explain the six most common symptoms of an engine misfire and the seven most common causes of an engine misfire.

Engine Misfire
Engine Misfire

Car Engine Misfires Symptoms

The symptoms of engine misfires are rough acceleration or rough idle. Another sign that you have a bad radiator core is a check engine light. You may also notice that the check engine light is flashing during the misfires.

Some of these are the most common signs, but not all of them. Here’s a detailed list of the most common symptoms of engine misfires.

Engine is the most important part of the car and its performance depends upon its efficiency. Engine is responsible for providing you the power that is required to run your car. So, if the engine is not working properly you can’t expect any power.

If you are a car owner then you know that if your car has a misfire problem then it will not give you the right kind of performance. That’s why before buying a car you need to check the engine of the vehicle.

Now, if you have bought a new vehicle and you found a problem in the engine then you need to check all the six parts of the engine and find the problem.

But if you are thinking that this is an unnecessary thing then you are wrong. If you are not aware of the engine then you will never know how it works. You can easily solve this problem with the help of an expert mechanic.

You can easily solve this problem by yourself. In fact, you can fix your own engine by knowing the problems and their solutions. Here are the top 6 symptoms of an engine misfire and their solutions:

No power

If you are facing no power issue in your car then it means that your engine is misfiring. You can fix it by knowing the causes and the solutions.

First of all, you need to know that the ignition coil is responsible for starting your engine. If the coil is not working then it is difficult to start your car.

Solution: You can replace the coil if it is in bad condition.

Car starts with a bang

If your car starts with a bang when you start it then it is a sign of an engine misfire.

The reason behind it is the spark plug is damaged and this is the root cause of the problem. If you find the spark plug damaged then it is better to replace it.

Solution: Check your spark plugs and change the old ones.

Car runs slow

If your car runs slowly and it’s not responding properly to your command, then it is a sign of an engine misfire.

You should check the spark plug as it is the most common problem that will occur in the engine.

Solution: You can change the spark plug if it is in bad condition.

Exhaust fumes

If you find exhaust fumes in your car while driving, then it is a sign of an engine misfire.

This is the common problem that you will face while driving.

Solution: You can clean your exhaust system as it is the root cause of the problem.

Car stops suddenly

If your car stops suddenly and you can’t start it again, then it is a sign of an engine misfire.

Solution: You can check the battery and then you can replace it if it is in a bad condition.

Rough Idle

Sometimes the engine will misfire on idle. The sensors that read air-fuel mixture will malfunction, and the fuel mixture will get messed up. A leaky head gasket is the most common source of the idling problem, and it will cause an uneven idle and can even shut the engine off on idle.

A small amount of excess fuel in the cylinder is most likely to cause misfires at idle because the cylinder is most sensitive to small air-fuel ratio problems at idle.


A car is very balanced when manufactured and often has balance axles and different tricks to get as few vibrations from it as possible. The cylinders are important to the balance of your engine, so if one of them isn’t firing, it can create an imbalance, and this can cause heavy vibrations inside your cabin when accelerating or when idling.

7 Common Causes of an Engine Misfire

Misfiring is the most common issue that every car owner faces. They are very common and it happens due to the reasons that we have already mentioned in this article.

Most of the time the engine misfires while starting, but if you observe it properly, you can find the main reason why it happens.

Here are the most common causes of an engine misfire.

Over heating

If you see a small flame coming out of the engine, it means that there is something wrong with the fuel or air flow. If you see this flame then stop your car immediately and check if the battery is dead or the alternator is damaged.

Air pressure is low

If you see a spark while starting, it means that there is something wrong with the air flow. Check the gas tank, check the gas cap, and the air filter.

Gas is leaking

It is very common that the gas leaks when it is cold, especially in winter. If you observe any leakage, then you need to replace the gas canister and the gas lines.

Spark plugs are worn out

Check the spark plugs and clean them properly.

Valve cover is stuck

If you see the valve cover is closed then it means that there is something wrong with the camshaft.

Timing belt is broken

It is very common that the timing belt is damaged. It is also the most expensive part of the engine and it needs to be replaced in order to avoid the damage.

Plug is overheated

If you see the plug is overheated, then it is necessary to drain the water from the engine.

What is an Engine Misfire?

An engine misfire is an instance when one cylinder doesn’t fire properly because of a mechanical fault in the cylinder or a faulty part.

An engine misfire is a problem that occurs in a car engine when one or more of the cylinders does not fire. This can cause an engine to stop working or start losing power.

In some cases, the driver will hear a clanking noise coming from the engine. An engine misfire can lead to a number of problems in your car, such as:

  • The car won’t start
  • You may smell smoke from the exhaust pipe
  • Your engine may lose power

    The causes of engine misfires are varied and can be related to things like:
  • Mechanical issues
  • Fuel problems
  • Electrical problems


Is engine misfire serious?

Your engine misfired because it needed to be fixed. It’s not that serious but if it keeps happening, you need to have it checked out. A locked up wheel can also cause the same situation where the car becomes difficult to steer due to the loss of power steering.

What does an engine misfire feel like?

If your engine is misfiring it may sound like it’s shaking or making a knocking sound.
There are a few things that can cause you to be aware that something may not be right in your car. If you think your engine is having problems, the best thing to do is take it to an automotive mechanic to have it looked at.

How much does it cost to fix engine misfires?

It’s pretty easy to fix most engine misfires, but it depends on how serious the fault is and what specific repairs are needed.
Engine misfires caused by bad ignition coils can be repaired cheaply, but bad spark plugs are more expensive to fix. You are unlucky, because it can be caused by a bad compressor and it’s often very expensive to fix.

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