What is an Engine Misfire?

July 26, 2022

Hand holding a used spark plug with car engine in the background, and three more spark plugs. | Dave's Automotive LLC

Most drivers and car owners find it frustrating when the engine misfires. It is crucial to understand how an engine can misfire, what causes it, and what to do when it misfires.

What exactly happens when the engine misfires?

To understand what an engine misfire is, you need to understand the simple version of how your engine works. All engines use combustion to generate power. Yes, your engine uses fire (from a spark) generated from fuel and oxygen. When your engine misfires, it can be because oxygen, power, or the spark are not introduced to the engine cylinders in time. The ignition process is delicate and requires all components to be presented at the right time for optimal functioning.

One cylinder can misfire while the rest work perfectly, so your car will continue working, but you will notice a decrease in performance.

How does it feel when the engine misfires?

If your engine misfires, you may hear a pop sound accompanied by the smell of burning fuel or coolant. You may also feel like the engine is stumbling and losing speed or power.

What causes an engine to misfire?

Clogged fuel injectors- If engine cylinders do not get the right amount of fuel, then the spark plug will go on a solo mission with no accelerant (fuel) to get the show going.

Worn-out spark plugs- Spark plugs provide the spark to get the combustion in the engine cylinder going. Without the spark, the cylinder would receive fuel and oxygen, which can not combust without a spark.

Ignition coils and wires- Spark plugs get power from an electric current delivered through ignition coils and wires. Each cylinder has coil packs that provide electricity. Faulty or work-out Ignition coils or wires will not offer electricity causing the engine to misfire.

Can I Drive My Car if the Engine Misfires?

A car with a misfiring engine can still function, so you can take it for a ride, but this is akin to a dime now for a thousand dollars tomorrow.

Does your vehicle need urgent attention because of an engine misfire? We invite you to bring your vehicle into our auto repair shop today for the best repair services on this side of town.

Make An Appointment
You do not have My Garage enabled.
Section under maintenance.
10 Winter Driving Mistakes That Can Turn Your Joyride into a Nightmare | Dave's Automotive
November 28, 2025
Dave's Automotive in Stockertown, PA, highlights ten winter driving mistakes that can quickly turn a fun trip into a stressful experience.
7 Bad Habits Behind the Wheel That Lead to Costly Repairs | Dave's Automotive
November 24, 2025
Dave's Automotive in Stockertown, PA, shares seven everyday driving habits that increase the risk of expensive vehicle repairs.
6 Car Issues That Get Worse When Temperatures Drop  | Dave's Automotive LLC
September 26, 2025
Dave's Automotive in Stockertown, PA, shares six car issues that get worse when temperatures drop.
A car is leaking a dark fluid onto a gray asphalt surface. | Dave's Automotive LLC
August 29, 2025
Dave’s Automotive in Stockertown, PA, covers the five most common types of automotive fluid leaks and how to spot them early.
Four new, metallic spark plugs against a dark blue background. | Dave's Automotive LLC
July 29, 2025
Dave’s Automotive in Stockertown, PA, discusses how worn spark plugs can lead to summer stalling and poor performance.
Family in convertible car, smiling, traveling on sunny day. | Dave's Automotive LLC
June 27, 2025
Dave’s Automotive in Stockertown, PA, offers great ideas to keep kids happy and busy during long road trips with interactive games and tips.
Dirty, rectangular cabin air filter from a car, lying on engine components. | Dave's Automotive LLC
May 30, 2025
Dave’s Automotive in Stockertown, PA, explains how a dirty engine air filter can affect your fuel economy and reduce engine performance.
Close-up of a car engine.  A serpentine belt is visible with a bracket and some wiring. | Dave's Automotive LLC
April 28, 2025
Dave’s Automotive in Stockertown, PA, explains why squeaking belts shouldn’t be ignored and how they relate to engine accessories and safety.
Woman opens the trunk of a white SUV parked next to a yellow field under a blue sky. | Dave's Automotive LLC
March 28, 2025
Dave’s Automotive in Stockertown, PA, explains what to do when your car hood won’t close properly. Learn common causes and how to fix the issue safely.
Illuminated dashboard, displaying
February 28, 2025
Dave’s Automotive in Stockertown, PA, explains whether it’s normal for a car to consume oil over time. Learn what’s acceptable and when to seek professional inspection.
Make An Appointment