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Spark Plugs

What are the Symptoms of a Bad Spark Plug?

Diagnosing a bad spark plug can be difficult, as it usually shares symptoms with many other potential problems, but there are some things you can look for.

- Higher than Normal Fuel Consumption

- Lack of Power When Accelerating

- Engine Idles Roughly or Struggles to Start

- Engine Sputters or Misfires While Accelerating

While a vehicle is running, each spark plug in the engine is firing hundreds to thousands of times per minute. Over time, this wears on the plug, leaving it potentially unable to create a spark. There are a few different types of spark plugs, including copper, platinum, and iridium. The lifespans of each can vary greatly. Generally, standard copper plugs will last around 35,000 km, with platinum plugs lasting around 100,000 km, and iridium plugs lasting up to 150,000 km.

A bad spark plug could mean that the engine has cylinders that are not firing, causing it to sputter and run poorly. This greatly affects the vehicle’s efficiency and performance.

It is generally recommended that you replace spark plugs with those made by the vehicle’s original parts manufacturer. Often times this means AC Delco for GM engines, Autolite for Ford engines, Champion for Chrysler engines, and NGK or Denso for Asian makes. Consult your vehicle’s owner’s manual for recommended spark plug replacement specifications.

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Popular Spark Plugs

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Bosch 6703 product image
$4.77
50+ In Stock
Condition: New
Ships: Monday Mar. 30th
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Bosch ZGR6STE2 product image
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Bosch ZR5TPP33 product image
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50+ In Stock
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Bosch 6747 product image
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NGK 95660 product image
$23.69
50+ In Stock
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NGK 2438 product image
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Bosch 7405 product image
$7.54
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Condition: New
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Denso 4701 product image
$15.06
10+ In Stock
Condition: New
Ships: Monday Mar. 30th
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Made in Japan
Bosch 6724 product image
$4.77
10+ In Stock
Condition: New
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Made in Germany
NGK 6597 product image
$11.89
In Stock
Condition: New
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Made in Japan
NGK 94705 product image
$17.20
10+ In Stock
Condition: New
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Bosch 8160 product image
$10.75
50+ In Stock
Condition: New
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Made in Germany
NGK 6962 product image
$4.10
10+ In Stock
Condition: New
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NGK 92145 product image
$15.83
50+ In Stock
Condition: New
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NGK 7784 product image
$5.63
10+ In Stock
Condition: New
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NGK 7098 product image
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50+ In Stock
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Ships: Monday Mar. 30th
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NGK 94122 product image
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10+ In Stock
Condition: New
Ships: Monday Mar. 30th
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Autolite 308 product image
$3.45
In Stock
Condition: New
Ships: Monday Mar. 30th
Pick-Up: Available Immediately