How long do Subaru spark plug wires last?
Subaru spark plug wires typically last between 60,000 to 100,000 miles, depending on driving conditions and maintenance. However, it's important to regularly inspect and replace them as needed to ensure optimal engine performance and fuel efficiency.
Understanding Subaru Spark Plug Wires
Spark plug wires, also known as ignition cables, are an essential component of a Subaru's ignition system. They transmit the high-voltage electrical current from the ignition coil to the spark plugs, which then ignite the air-fuel mixture in the engine's cylinders. Over time, these wires can become worn, cracked, or damaged, which can lead to misfiring, reduced power, and decreased fuel economy.
Factors Affecting Spark Plug Wire Lifespan
- Driving Conditions: Vehicles driven in harsh environments, such as extreme temperatures, high humidity, or dusty conditions, may experience faster wear on their spark plug wires.
- Maintenance History: Regular maintenance, including inspections and timely replacements, can help extend the lifespan of Subaru spark plug wires.
- Engine Performance: High-performance engines or those that experience frequent high-RPM operation may put more stress on the spark plug wires, leading to a shorter lifespan.
- Wire Quality: The quality of the spark plug wires used can also impact their longevity. Subaru recommends using genuine OEM or high-quality aftermarket spark plug wires for optimal performance and durability.
It's important to note that while the typical lifespan of Subaru spark plug wires is 60,000 to 100,000 miles, it's always best to follow the manufacturer's recommended replacement intervals and inspect the wires regularly for any signs of wear or damage.
Symptoms of Failing Spark Plug Wires
Some common signs that your Subaru's spark plug wires may need to be replaced include:
- Rough idling or engine misfiring
- Decreased fuel efficiency
- Reduced engine power or acceleration
- Visible cracks, splits, or damage to the wires
- Difficulty starting the engine
If you notice any of these symptoms, it's important to have your Subaru's ignition system inspected and the spark plug wires replaced as needed to maintain optimal engine performance and fuel efficiency.
How often should spark plug wires be replaced?
Spark plug wires should be changed every 30000 to 50000 miles or when your owners manual recommends. A visual inspection should be performed at each oil change. I have seen wires chewed by mice, rats and squirrels, often times it's obvious and o...
How do I know when my spark plug wires need replacing?
With the engine running, move the test light along the length of each spark plug wire. If a spark jumps from a plug wire to the test light at any point, this is an indication that the insulation has broken down, and the spark plug wire should be replaced.
What is the life expectancy of spark plug wires?
There's no set period of time. They work until they don't. And even then, they don't all fail at the same time. I've heard of individual plug wires failing after just a few years, and I've personally seen 50 year old wires that were still on the job and working fine.
How long do Subaru OEM spark plugs last?
Experts generally recommend replacing spark plugs every 30,000 miles for the best results. If one of your Subaru spark plugs gets out of whack, it can cause a reduction in gas mileage and engine problems later on.
How do I know if my Subaru spark plugs are bad?
One of the first signs of spark plug wear is trouble starting your Subaru. If the engine cranks longer than usual before starting or if you experience intermittent starting issues, it's time to inspect your spark plugs.
What are the symptoms of a bad spark plug wire?
The most obvious sign of faulty spark plug wires is your vehicle just feels a little 'off. ' It would probably start slowly with reduced gas mileage but could progress to no acceleration. Faulty spark plug wires or spark plug misfires can also cause problems starting your engine, a rough idle, and loss of power.
How long do OEM spark plug wires last?
Wires made today can go 50 -100K miles without any problem. The first sign that its time is some ignition noise in the radio, or a slightly rough idle in the morning. If I'm replacing plugs, I replace wires.
Should you replace all spark plug wires at once?
You can replace as many as you want at the same time. The reason people say that you should replace one at a time is to make sure you don't run the wrong wire to a spark plug. If you do cross wires, the engine won't run very well.
Do new spark plug wires make a difference?
Benefits of Replacing Spark Plugs & Wires
New spark plugs help to ensure that each cylinder is firing correctly, while new wires help to prevent interference from other electrical components. Fully operational spark plugs will provide a completely operational combustion process.
How often should spark plugs be changed on a Subaru?
Maintenance Tips for Subaru Spark Plugs
This includes following Subaru's recommended service intervals—typically every 60,000 miles for standard replacements. However, this can vary based on your driving habits and the specific Subaru model.
