Do I Need New Spark Plugs?

Spark Plugs | Hi-Tech Automotive Winnipeg


A spark plug is a small but vital component in your vehicle’s engine. It generates an electrical spark that ignites the air-fuel mixture within the engine's cylinders, initiating combustion and powering the vehicle. A spark plug consists of a central electrode, a ground electrode, an insulator, and a metal shell. These are all items that will normally wear out with time and usage. At Hi-Tech Automotive, our qualified technicians can perform regular inspection and replacement of spark plugs as required. Proper spark plugs are essential for maintaining engine performance and fuel efficiency. Spark plugs have come a long way in terms of the materials used lasting longer than the old days. Typical lifespan of spark plugs can be anywhere between 80,000 to 120,000km!

There are several signs that can indicate that your car may need new spark plugs:

Poor Fuel Economy: If you notice a decrease in fuel efficiency or if you find yourself refueling more often than usual, it could be a sign that your spark plugs are worn out and not igniting the fuel completely and efficiently.

Difficulty Starting the Engine: If your vehicle is having trouble starting, especially in cold weather or after sitting for a while, it could indicate worn spark plugs. Faulty spark plugs may struggle to ignite the air-fuel mixture, leading to difficulty starting the engine.

Rough Idling: A rough or shaky idle, where the engine vibrates excessively while running at idle, can be a symptom of worn spark plugs. Misfiring caused by faulty spark plugs can result in an uneven engine idle.

Poor Acceleration: If you notice a lack of power or sluggish acceleration, it could be due to worn spark plugs not providing sufficient spark to ignite the fuel-air mixture efficiently. This can lead to reduced engine performance and slower acceleration.

Engine Misfires: Engine misfires, where the engine stumbles or hesitates during acceleration or while driving, are a common sign of worn spark plugs. Misfires occur when the spark plugs fail to ignite the air/fuel mixture properly in one or more cylinders and can cause the engine light to illuminate on the dash.

If you experience any unusual behavior from your engine, such as rough performance, hesitation, or a noticeable decrease in power, it's a good idea to have your spark plugs inspected by a qualified technician to determine if they need replacement.