How do you check a Subaru ignition coil?

Checking a Subaru Ignition Coil
To check a Subaru ignition coil, you can perform the following tests based on the information from the search results:
1. Primary and Secondary Resistance Test:
– On MY2000+ Subaru models, there’s no way to check the primary of the ignition coils in the coil pack. However, the high voltage secondaries can be checked between the towers for cylinders 1 and 2, and the towers for cylinders 3 and 4. The resistance should be in the 12 k Ohm range.
– To check the ignition coil’s secondary resistance, connect an ohmmeter between the companion cylinder coil towers. First test cylinder numbers 1 and 2, then cylinders 3 and 4. The resistance should be between 10.4 and 15.6 k-ohms.
– Another method involves using a digital multimeter to measure resistance at the terminal pins of the coil packs. The resistance between PIN A and PIN B, as well as between PIN C and PIN D, should be 0.73 ± 10% for a Forester ignition coil.
2. Coil Pack Testing:
– It’s mentioned that it’s pretty rare to see coil failures with Subarus, and one of the fastest, easiest, and most accurate ways to test a coil pack is to swap coils.
3. Additional Considerations:
– If you suspect spark issues or misfires, it’s recommended to also check the crank and cam angle sensors before testing the ignition coil.
– If you’re experiencing misfires, it’s important to ensure that the spark plugs, plug wires, and connections are also checked.
Remember, if you’re unsure about the condition of your Subaru’s ignition coil, it’s always best to consult a professional mechanic for a thorough diagnosis and appropriate repairs.
I hope this information helps you effectively check your Subaru’s ignition coil! If you have any more questions or need further assistance, feel free to ask.

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.

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.

Can you check an ignition coil with multimeter?

And the other end to either the spark plug spring or clip. And if you have been able to remove the HT. Lead then you can touch it onto the Barb of the ignition coil.

How much does it cost to replace a Subaru ignition coil?

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

Will a bad ignition coil 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.

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 many ohms should a ignition coil read?

The ohmic resistance of the coil is around 0.2–3.0 Ω on the primary side and around 5–20 kΩ on the secondary side. The winding ratio of primary to secondary winding is 1:100.

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.

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.

How do I check if my ignition coil is bad?

Signs of a Bad Ignition Coil

1. Illuminated Check Engine Light. With most modern vehicles, a faulty ignition coil is enough to turn on the Check Engine Light.
2. Misfiring Engine. If an ignition coil is not working properly, your engine will likely misfire.
3. Hard Starts.
4. Worsening Gas Mileage.
5. Diminished Power.
6. Sudden Backfires.