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what are signs of bad spark plugs

Signs of Bad Spark Plugs

The engine of your car is a complex system. There are many moving parts that rely on one another to function properly for the whole machine to work. A malfunctioning spark plug could cause a lot of damage and lead to costly repairs. If they’re not working properly, your car won’t start or run as well. If you are experiencing any problems with starting or running, it is possible that one of these parts needs replacing.

It’s always best to change them when they start showing signs of wear and tear to make sure that it doesn’t affect your vehicle’s performance. In this blog post, we will explore 6 signs that indicate you need new spark plugs. 

Bad Spark Plugs

How To Identify A Bad Spark Plug?

Here are some signs that might indicate a bad spark plug:

  • A misfiring engine
  • Difficulty in starting up the vehicle 
  • Excessive exhaust smoke or blue/white smoke from the tailpipe 
  • Lack of power when accelerating quickly (especially at low RPM). 
  • Decrease in gas mileage
  • Rough Idle

These symptoms may mean that there is an issue with one of your spark plugs, which should be inspected immediately by a mechanic. Let’s study them in detail.

A Misfiring Engine

A bad spark plug can cause a misfire, which will affect how well your engine runs and could lead to other problems down the road. If you notice that your car has been running poorly or hesitating when accelerating, it might be time for a new spark plug.

signs of bad spark plugs and wires

Difficulty In Starting Up The Vehicle

If you have a hard time starting your car, it could be due to the spark plugs. Spark plugs are responsible for providing the necessary voltage and current needed to start up an engine.

They work by igniting fuel in the combustion chamber of a vehicle’s engine. When they wear out or break, they can cause difficulty in starting up a vehicle.

Lack Of Power When Accelerating Quickly

Do you have a car that doesn’t accelerate as quickly as it used to? If so, a bad spark plug is often the cause of this issue.

Spark plugs ignite the fuel in the engine, and if they are not working properly, it will be difficult for your car to accelerate. If this happens, you should have them replaced as soon as possible.

Excessive Exhaust Smoke or Blue/White Smoke From The Tailpipe

Do you know how excessive exhaust smoke from the tailpipe is a sign of a bad spark plug? A car’s engine needs the right amount of air and fuel in order to run. If there isn’t enough air, or if there is too much fuel, then the engine will not work correctly.

This causes it to make an excessive amount of exhaust smoke from its tailpipe. The most common cause for this problem is that the spark plugs are worn out and need replacing.

what are signs of bad spark plugs

Decrease In Gas Mileage

Have you been noticing a decrease in your gas mileage? If so, it could be due to a bad spark plug. The spark plugs are responsible for igniting the fuel and air mixture inside the engine cylinder.

When they’re not working properly, this can lead to decreased gas mileage and increased emissions. A car with poor performance or low gas mileage may have a bad spark plug that needs replacing.

Rough Idle

A bad spark plug can cause rough idle. When the engine is running, it will shake and vibrate more than usual. This could be caused by a faulty ignition coil or wiring problem, but if your car has been idling roughly for some time, this may be the culprit.

If your vehicle is shaking when you’re driving at low speeds, this could also be an indication of a bad spark plug.

Bottom Line

Spark plugs are a crucial component of the engine. They provide the spark that ignites the fuel in the cylinder and creates power. If they’re not working properly, it can cause a variety of problems with your car.

You don’t want to be stuck on the side of the road or stranded at home because you didn’t know about this vital part of your vehicle! Be proactive and check out these six signs that might indicate you need new spark plugs.