How do I know if my Subaru spark plugs are bad?

How to Tell If Your Subaru Spark Plugs Are Bad
If you suspect that your Subaru’s spark plugs may be bad, there are several signs to look out for:
1. Difficulty Starting Your Vehicle:
– One of the main signs of bad spark plugs is having trouble starting your vehicle.
2. Engine Performance Changes:
– If your vehicle’s performance has suddenly changed, such as engine sputtering or not running smoothly, it could be a sign of bad spark plugs.
3. Worsening Gas Mileage:
– A bad spark plug may not burn fuel as efficiently, leading to a decrease in gas mileage.
4. Visual Inspection:
– You can visually inspect the spark plugs for worn-down electrodes or residue buildup.
It’s important to note that spark plugs are important maintenance items that should not be overlooked. Regularly servicing and replacing spark plugs according to the manufacturer’s specifications is crucial for maintaining engine performance, fuel mileage, and exhaust emission standards. If you’re unsure about the condition of your Subaru’s spark plugs, it’s recommended to have them inspected by a professional technician at a Subaru service center.

How do I know when my spark plugs need replacing?

5 Signs You Need New Spark Plugs

1. Engine Misfires. A misfiring engine is a big sign that one or more of your spark plugs are not firing properly.
2. Poor Gas Mileage. When spark plugs are working correctly, they burn fuel efficiently in your engine.
3. Trouble Starting.
4. Slow Acceleration.
5. Rough Idling.

How do you check spark plugs on a Subaru?

Checking Your Spark Plugs In 7 Steps

1. Open the hood.
2. Remove the engine cover (if there’s one).
3. Remove the air filter housing.
4. Disconnect the ignition coil from one of the spark plugs.
5. Unscrew the spark plug and then pull it out of the cylinder.
6. Inspect the spark plug.

Can I drive with a bad spark plug?

Ideally, you should replace them immediately. However, you can get by for a short while, as long as they aren’t misfiring. Poor spark keeps fuel from being burned inside the combustion chamber. This reduces power and fuel economy, and it makes it harder for the engine to idle.

Is it hard to change spark plugs on a Subaru?

Replacing spark plugs is something you can do at home within an hour as long as you have the following tools: Appropriately sized spark plug socket. 8-10mm sockets. Ratchet and extensions.

How much does it cost to do spark plugs on a Subaru?

The average cost to have your spark plugs replaced starts at around $100 up to $300+, depending on the type of spark plugs needed.

Will bad spark plugs throw a code?

Often, there’s an odor of unburnt gasoline that will be noticeable whenever a spark plug goes bad. On a new enough vehicle, you’ll likely also see a check engine light. That light will most likely be throwing a code for an engine misfire on one cylinder.

How often should spark plugs be changed in a Subaru?

every 60,000 miles
How Often Should You Have the Spark Plugs in Your Subaru Changed? Modern SUBARU BOXER® engines require improved spark plugs made with material like platinum. This means you’ll only have to worry about changing them every 60,000 miles or so.

What does a bad spark plug sound like?

If your vehicle’s engine is making any unusual sounds or vibrations while idling your vehicle’s spark plugs may not be functioning properly to keep the engine running smooth.

Why are Subaru spark plugs so expensive?

Because of the cost of iridium, the electrode is thinner, but they still deliver better power, better combustion and longer life than other plugs.

What are signs of spark plugs going bad?

What are the signs your Spark Plugs are failing?

• Engine has a rough idle. If your Spark Plugs are failing your engine will sound rough and jittery when running at idle.
• Trouble starting. Car won’t start and you’re late for work… Flat battery?
• Engine misfiring.
• Engine surging.
• High fuel consumption.
• Lack of acceleration.