1. Check Engine Light Illuminates
When the dreaded Check Engine Light (CEL) pops up on your dashboard, it could mean many things — and faulty spark plugs are no exception. In some cases, the CEL may start flashing, indicating catastrophic engine misfires could be happening. Whether the CEL is static or blinking, take your vehicle to your nearest automotive professional as soon as possible.
2. Starting Problems
As mentioned earlier, spark plugs are essential to starting your engine. When spark plugs wear out, they may struggle to produce a strong spark to ignite the air/fuel mixture, resulting in extended cranking or multiple attempts to start the engine. Also, pay attention to any unusual hesitations or sputtering while driving. If you encounter any of these symptoms and have a working battery and full gas tank, your spark plugs might be defective.
3. Engine Misfires
An engine misfire can occur when the spark plugs fail to ignite the air/fuel mixture at the right time. So, what happens next? You could notice a lack of power, hesitation, or jerking sensation while driving around town. To avoid further damage to your vehicle, get your spark plugs inspected and replaced if necessary. It's better to be safe than sorry!
4. Poor Fuel Economy
Are you hitting the gas pump more often than usual? Worn or fouled spark plugs can cause the engine to misfire, increasing fuel consumption. So, if you notice a drop in your vehicle’s gas mileage, it’s worth looking at your spark plugs.
5. Acceleration Problems
Faulty spark plugs can cause a delay in power delivery, leading to sluggish acceleration and reduced engine response. If your vehicle's acceleration and overall performance are not up to par, it might be time to replace your spark plugs.
6. Rough Engine Idling
Feeling some shaking or vibrations while your vehicle is sitting idle? You may need to inspect your spark plugs because these little guys can make your engine sound and feel choppy to the point where the whole vehicle might shake. A normal idle should be smooth and quiet, so if you’re experiencing any engine knocking or rattling, your spark plugs may be defective.
