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What is An Engine Misfire?

Engine misfires can be frustrating, annoying, and inconvenient. A lot of the information surrounding engine misfires can be misleading and sound worse than they actually are. These misfires can be short-term or long-term problems. Use these facts to learn more about engine misfires and when to take your car to a shop.

What Are the Signs of an Engine Misfire?

Common symptoms of an engine misfire include:

  • Rough acceleration
  • Rough idle
  • Vibrations
  • Check engine light
  • Slow acceleration
  • Engine sound change

Common Causes of Engine Misfire?

Bad or Faulty Ignition Coil

Some cars have a separate ignition coil located on each spark plug and other cars only have a single coil accompanied by spark cables that connect to each spark plug. A mechanic needs to unplug each coil to determine if one or more cylinders are not responding.

Bad or Faulty Spark Plug

Engine misfires are often caused by faulty spark plugs. As time progresses, your spark plugs can become worn due to the spark they ignite through the cylinders. If you don't recall having your spark plugs replaced, it's a good idea to have a mechanic replace them immediately.

Gasket Leaks

It is common to find intake leaks around the cylinder heads. If you have an older car, gasket leaks are more common than it is in newer model cars. Newer cars have steel gaskets. Whether you're driving an older or newer model car, have a mechanic check for gasket leaks and similar issues.

Low Fuel Pressure

A common cause of low fuel pressure is a faulty fuel pressure regulator. Other causes of low fuel pressure can include a clogged fuel filter or a defective fuel pump. Having low fuel pressure can result in misfires for each cylinder. If you get your car inspected, a mechanic will likely find various error codes as a result of low fuel pressure.

Injector Problems

Faulty fuel injectors are not as common as they once were, but they too can cause engine misfires. Injector problems can be difficult to detect without testing for this specific problem. Make sure you mention injector issues to your mechanic, so they can address the situation properly.

If your engine is misfiring, there's no need to worry. Bring your vehicle to our repair shop today so we can determine the problem. We look forward to seeing you!

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