What are the symptoms of a bad ignition coil on a Subaru?

Symptoms of a Bad Ignition Coil on a Subaru
When an ignition coil in a Subaru is malfunctioning, there are several symptoms to watch out for. These include:
1. Engine Hesitation When Accelerating or Loss of Power: A common sign of bad ignition coils in Subaru vehicles is engine hesitation when accelerating or a loss of power.
2. Rough Idle: Another symptom of a faulty ignition coil is a rough idle, which can indicate issues with the ignition system.
3. Misfires: Bad ignition coils can lead to engine misfires, causing the vehicle to run unevenly or with a noticeable lack of power.
4. Excessive Fuel Consumption: A malfunctioning ignition coil can result in excessive fuel consumption, impacting the vehicle’s overall fuel efficiency.
5. Check Engine Light Illuminates: When the ignition coil is failing, the check engine light may illuminate on the dashboard, indicating a problem with the vehicle’s engine or emissions system.
6. Hard Starting: In some cases, a bad ignition coil can make it difficult for the engine to start, leading to prolonged cranking or starting issues.
7. Unusual Smells: An unexpected smell of gasoline from the exhaust can be caused by an ignition coil unable to supply sufficient power to the spark plugs, leading to inefficient fuel burning and the release of a potent gas aroma.
It’s important to note that the ignition coil test for Subarus is a simple and straightforward process, and if the coil pack is found to be off during testing, it may need to be replaced. Additionally, driving a Subaru with bad ignition coils can potentially damage the engine or catalytic converter, so it’s crucial to address these issues promptly to avoid more expensive repairs.
If you suspect that your Subaru’s ignition coil may be faulty, it’s advisable to have it inspected and, if necessary, replaced by a qualified technician to ensure the proper functioning of your vehicle.

How do I know if my ignition coil is going bad?

If an ignition coil is not working properly, your engine will likely misfire. A misfiring engine results in a jerking or sputtering feel when you are moving at normal speeds. When you stop, a misfire from a bad ignition coil may cause your vehicle to run roughly, vibrate or shake.

How do I know if my Subaru coil pack is bad?

Find the spark plug wire terminals and then plug your multimeter in two of them. Make sure that both terminals are pointing directly opposite of each other. The reading should be about 12,800 ohms, plus or minus 15%. If the reading is off, then the coil pack is bad and it needs to be replaced.

Why do Subarus sound like they are misfiring?

The 2.5-liter Subaru engine makes use of something called unequal length headers, which are exactly what they sound like. The header piping from cylinders one and three are of a different length than those from two and four.

Will bad coil packs throw a code?

Yes, a bad coil will definitely cause a check engine light. Typically, if it is just one going bad, the DTC (Diagnostic Trouble Code – the code that causes the light to come on – which can be read usually for free at most auto parts stores) will correspond to the cylinder that has the bad coil.

How long do Subaru ignition coils last?

60,000 to 100,000 miles
As a rule of thumb, you should replace your ignition coils anywhere from 60,000 to 100,000 miles after installation.

What is the easiest way to check an ignition coil pack?

You can perform a visual inspection to look for cracks, burn marks, or carbon tracking. You can also swap the ignition coil to another cylinder to confirm whether it’s faulty.

How do I know if my Subaru has a misfire?

You can identify a misfire by looking at the engine temperature gauge and listening for an irregular idle or engine noise. A faulty spark plug or ignition coil could be the cause of this and should be checked for damage before removing them from the car engine.

What is the easiest way to check an ignition coil?

If you suspect the coil is dead, you can also remove the coil, plug it back in, and use an ignition spark tester like OEM 25069 to determine if the coil is firing. You can also use a multimeter to test resistance.

How much does it cost to replace ignition coils on a Subaru?

It can cost anywhere between $80 and $300 to replace an ignition coil. The exact cost depends on several factors, including: Your Subaru model.

What is the code P0300 on a Subaru?

What Does P0300 Mean? Code P0300 stands for “Random or Multiple Cylinder Misfire Detected.” This diagnostic trouble code (DTC) indicates that your car’s computer has detected an engine misfire that’s random and/or appearing on multiple cylinders.