Ignition Coil Guide for 2011-2016 Ford F-350 6.2L V8
Everything you need to know before replacing the ignition coils on your gas-powered Super Duty.
- Applies only to the 6.2L V8 gas engine; diesels do not have ignition coils.
- Internal corrosion is a common failure mode; inspect new coils and use dielectric grease.
- It is highly recommended to replace all 8 coils, 16 spark plugs, and the plug wires at the same time for best results.
- Be aware that a faulty PCM can mimic the symptoms of a bad coil; codes P0351-P0358 are a key indicator of this.
Is Your F-350's Ignition Coil Failing?
A bad ignition coil on your 6.2L V8 will usually make itself known through poor engine performance. Because each cylinder has its own coil, the failure of one means that cylinder isn't firing correctly, a condition known as a misfire. You'll likely notice the engine running rough, shaking, or sputtering, especially when idling at a stoplight. Other common signs include a noticeable loss of power, worse fuel economy, and difficulty starting the engine. In some cases, you might even experience the engine stalling unexpectedly or backfiring with a loud bang from the exhaust. The most direct sign is a Check Engine Light on your dashboard.
A Note on Powertrain Control Module (PCM) Issues
For 2011-2016 Super Duty trucks with the 6.2L engine, it's important to know that the Powertrain Control Module (PCM) can sometimes be the root cause of ignition coil problems. The PCM contains driver circuits that control the coils, and these circuits can fail. If you replace a coil and the misfire code for that same cylinder returns, or if you swap a suspected bad coil with a good one and the misfire doesn't move to the new cylinder, the PCM may be at fault. This often results in codes like P0351 through P0358, which point to a problem in the coil's electrical circuit.
🎬 Watch this guide on diagnosing and repairing PCM-related misfire symptoms.Choosing the Right Aftermarket Ignition Coil
When shopping for new ignition coils, you have a choice between OEM (Original Equipment Manufacturer) and aftermarket brands. For the 6.2L V8, the original coils are made by Denso for Ford's Motorcraft brand. While OEM is always a safe bet, quality aftermarket brands can offer reliable performance, often at a better price.
Based on owner feedback and mechanic recommendations, aftermarket brands can be grouped into tiers:
- Top-Tier Aftermarket (OEM Quality): Brands like Hitachi and NGK are well-regarded and often considered equivalent to OEM quality. Denso, the original supplier, is also available on the aftermarket. These brands use high-quality materials, such as copper windings, which helps them last longer.
- Reputable Mid-Tier: Brands like Standard Ignition (SMP) and Delphi have a generally good reputation among mechanics. They provide a balance of quality and value.
- Entry-Level/Budget: Brands like Spectra and Walker Products fall into this category. While they can be a budget-friendly option, long-term durability can be a concern compared to higher-tier brands. Some owners have used them without immediate issues, but the general advice is to opt for OEM or top-tier aftermarket for critical components like ignition coils to avoid doing the job twice. 🎬 See a review of the best ignition coil brands available today.
Pro Tip: Replace in Sets
If one ignition coil has failed due to age and heat, the others are likely not far behind. Mechanics often recommend replacing all eight coils at the same time. This ensures even performance across all cylinders and can save you from repeated repairs down the road. While you're replacing the coils, it's the perfect time to also replace all 16 spark plugs and the spark plug wires.
Known Issues and Technical Service Bulletins (TSBs)
A common problem on the 6.2L V8 is internal corrosion inside the ignition coil. Moisture can get past the boot and cause the small resistor and spring inside the coil to corrode. This leads to a poor connection, causing misfires, stalling, and setting trouble codes. In many cases, the corrosion is so bad that the coil cannot be salvaged and must be replaced entirely. 🎬 Learn how internal corrosion causes flashing engine lights and misfires. When replacing your coils, it's wise to apply a small amount of dielectric grease to the inside of the new coil boot to help seal out moisture.
- TSB 10-25-7: For some 2011 F-350 models built between January and September 2010, Ford issued a bulletin for a ticking noise accompanied by misfire codes (P0300-P0308). The bulletin advises inspecting the coil-on-plugs and ignition wires first before checking for more serious internal engine issues.
- TSB 18-2188: While this applies to slightly newer 2017-2018 models, it notes that cold weather starts can cause spark plug fouling and misfire codes. This highlights the sensitivity of the ignition system.
No specific recalls for ignition coils were found for the 2011-2016 Ford F-350.
| Part Type | Estimated Cost (Single Coil) | Estimated Cost (Set of 8) |
|---|---|---|
| New OEM (Motorcraft/Denso) | $80 - $150+ | $640 - $1200+ |
| New Aftermarket | $67 - $112 | $530 - $900 |
| Shop Labor (Set of 8) | $200 - $400 | |
Frequently Asked Questions (FAQ)
Is it hard to replace the ignition coils on a 6.2L F-350?
No, it is a relatively easy job for a DIYer with basic tools. The coils are located on top of the engine and held in by a single 8mm bolt. You'll need to disconnect the electrical connector, unbolt the coil, and pull it straight up. Accessing the coils on the passenger side is straightforward, while the driver's side may require moving some hoses or wires out of the way. The entire job for all eight coils can typically be done in under 2 hours.
Do I need to replace the spark plugs at the same time?
It is highly recommended. The ignition coils must be removed to access the upper set of spark plugs anyway. Worn spark plugs put extra stress on the coils, which can cause them to fail prematurely. Since the 6.2L engine has 16 spark plugs and the labor is already being done, it's cost-effective to replace them all at once.
What is the difference between driver and passenger side coils?
On the 6.2L V8, the ignition coils for the driver's side and passenger's side are different parts. The mounting hole for the hold-down bolt is in a different position. Be sure to order four of each specific side or a complete kit that includes both. Aftermarket brands often mark them with a 'D' for driver and 'P' for passenger.
What tools do I need to replace my ignition coils?
You will need a ratchet with an 8mm socket (or a 7mm socket on some model years) to remove the coil bolt, a pocket screwdriver to help release the electrical connector's locking tab, and dielectric grease for the new coil boots. If you are also changing the spark plugs, you will need a spark plug socket (5/8"), extensions, and a torque wrench.
Helpful Videos
Technical Specifications
OEM Part Numbers: AL3Z-12029-A (Passenger Side) AL3Z-12029-B (Driver Side)
This engine uses a coil-on-plug system with 8 distinct coils. The coils for the driver's side (UF639 equivalent) and passenger's side (UF631 equivalent) are not interchangeable due to different mounting points.
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The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
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