4 Common Signs Your Spark Plugs Need Replacing

4 Common Signs Your Spark Plugs Need Replacing

25th Jul 2023

Your car is able to run because there are thousands of different components all coming together to operate your engine and move your wheels. It’s a precise process, and when something gets a little old, things can start to malfunction. The spark plugs are just one piece of this puzzle, but knowing when you need to replace them can be tricky. Thankfully, there are a few common signs your need to replace your spark plugs. Look for these signs that will show you it’s time to open up your car and fix things before you end up with a broken car.

Difficulty Starting

One of the clearest signs you need to replace your spark plugs is difficulty starting your vehicle. When you turn the ignition in your vehicle, you’re not simply pressing a button that turns on your engine. Instead, turning the ignition makes the spark plugs emit electricity, igniting the fuel and air mixture in your engine. This process is how your vehicle starts, and if it’s not working as it should, you probably have an issue with your spark plugs. Neglecting this sign will lead to more difficulty starting, as well as additional damage to your ignition and engine if you’re not careful.

Poor Fuel Economy

A decreasing fuel economy is another sign you need to replace your spark plugs. If everything works as it should in your vehicle, your fuel economy should remain fairly consistent. Unfortunately, it’s easy for spark plugs to degrade over time, about every 30,000 miles or so, leading to worsening fuel economy. Older spark plugs lead to inefficient fuel burning, ultimately leading to decreased engine performance and poor gas mileage.

Rough Idling

When you’re stopped and idling, you’re not doing your vehicle any favors. Running your engine like this is already somewhat bad for your vehicle, but it’s necessary when you’re simply waiting at red lights. However, your car should still be smooth and quiet. If you notice vibrations or odd noises as you’re idling, there could be an issue with your spark plugs. Rough idling is a major sign there’s something wrong, and you’re putting your car in a dangerous position the longer you put off fixing it.

Check Engine Light

Your vehicle has some specific warning lights to indicate when there’s something wrong. While there’s no spark plug indicator, you may notice a check engine light. Malfunctioning spark plugs can turn on this indicator, but you won’t know the cause unless you notice other signs or take your car to a mechanic. There, the professionals can better spot if your spark plugs are causing the issue.

If you know how to look for the signs your spark plugs need replacing, you can keep your car in good condition for years to come. However, even when you know which signs to look for, the follow-up is even more important. Noticing these signs and neglecting them will only hurt your vehicle further, so instead of letting that happen, find the parts you need. Here at Yota Shop, we have all the online Toyota parts you need to keep your car running smoothly into the future. Work with us and give your car the care it needs.