How often should F-150 spark plugs be changed?
In most modern Ford F-150s, spark plugs last about 100,000 miles under normal driving conditions.
The exact replacement interval depends on the engine type, spark plug material, and how you drive. Always check your owner's manual or consult a Ford service advisor for your specific model year and engine configuration, since some older or base-model F-150s used copper plugs with shorter intervals.
What affects the replacement interval
Key factors include engine type (EcoBoost versus naturally aspirated V8), spark plug material (iridium/platinum versus copper), and driving habits such as frequent towing, stop-and-go city driving, or dusty or severe conditions. The following guide reflects typical expectations by setup.
- Iridium or platinum plugs in most current F-150 engines (for example 2.7L EcoBoost, 3.5L EcoBoost, and 5.0L V8): commonly rated for up to 100,000 miles under normal conditions.
- Copper plugs found on older or entry-model F-150s: typically require replacement every 30,000–60,000 miles, depending on driving conditions and maintenance history.
- Severe service or heavy towing/duty cycles: plan for shorter intervals; inspection around 60,000 miles or sooner if performance drops.
- Common wear symptoms that indicate replacement may be needed sooner: rough idle, misfires, decreased fuel economy, or hard starting.
In short: for most newer F-150s with long-life plugs, aim for around 100,000 miles under normal use, but verify the exact spec in your manual and adjust for your conditions.
Replacing spark plugs: a typical approach
Following these steps helps ensure a correct, safe replacement. The process is straightforward but requires care to avoid cross-threading and damage to ignition coils.
- Gather the right tools and parts: the correct spark plugs for your engine, a torque wrench, a ratchet and extension, a spark plug boot puller, and dielectric grease if recommended by Ford for your engine.
- Relieve any engine pressure and, if advised, disconnect the negative battery terminal. Locate and remove the ignition coil from each plug well.
- Carefully unplug the coil pack connector, then unscrew and remove the old spark plug. Avoid dropping debris into the cylinder.
- Check the new plugs: ensure the gap is correct if the plugs are not pre-gapped; many modern iridium/platinum plugs come pre-gapped to spec.
- Install the new plugs, finger-tight and then torque to the manufacturer’s specification using a torque wrench. Do not over-tighten to prevent thread damage.
- Reinstall ignition coils, reconnect electrical connectors, and complete any reassembly. Start the engine and verify smooth operation; scan for trouble codes if available.
After the replacement, routine checks and a short test drive help ensure the plugs seat properly and the engine runs cleanly.
Maintenance tips and caveats
- Do not reuse worn coils; if you notice misfires, inspect coil packs at the same time as plugs.
- For many Ford F-150 engines, Ford recommends not using anti-seize on all spark plug threads when installing iridium/platinum plugs to avoid overtightening; always follow the torque spec in the service manual.
Bottom line
Plan around a 100,000-mile interval for most current F-150 engines with long-life plugs, but verify the exact recommendation for your year and engine. If you tow often or operate in harsh conditions, inspect earlier and heed any symptoms of wear.
Summary
Most newer Ford F-150 models are equipped with long-life spark plugs designed to last about 100,000 miles under normal driving. Copper plugs or older engines may require more frequent changes, and severe service can shorten the interval. Always consult your owner's manual for the precise recommendation for your specific vehicle, and replace plugs with the correct torque and care to maintain performance and fuel efficiency.
How long do Ford F-150 spark plugs last?
How long do spark plugs last in a Ford F-150? Spark plugs in your Ford F-150 can last upwards of 60,000 miles but typically should be inspected around the 30,000-mile mark. Although these components can last longer than 60,000 miles, they can cause trouble when they go bad and may interrupt your performance.
How often should I replace spark plugs on my 3.5 EcoBoost?
100,000 miles
Ford officially says you can go 100,000 miles before changing the spark plugs in most EcoBoost engines, including the 3.5L version, but any mechanic or truck owner will tell you that these turbocharged engines work spark plugs much harder than standard ones.
How much does it cost to replace spark plugs in a Ford F-150?
The cost to replace spark plugs on a Ford F-150 typically ranges from $250 to over $500, depending on the truck's age, engine, and whether you do it yourself. A professional service will cost more due to labor, with estimates often landing in the $350-$450 range, while a DIY approach can save you money on labor but requires parts cost plus your time.
Professional service
- Typical range: Expect to pay anywhere from approximately $250 to over $500 for professional replacement.
- Factors influencing cost: The exact price depends on the year and specific engine of your truck. Newer models or engines with more complex designs, like some V6 or V8 engines, can have higher labor costs.
- Why it's more expensive: This includes the cost of parts and a significant amount of labor time, which can be high, especially if certain plugs are difficult to access.
- Example: A 2016 F-150 with a 2.7L Turbo V6 might cost around $335-$470, while an older 5.0L V8 might be closer to $250-$365.
DIY (Do-it-yourself)
- Parts cost: The price for the spark plugs themselves is relatively low, often ranging from around $32 for a set on a four-cylinder engine to about $64 for a V8, though this can vary significantly. You can find many options for as low as $10-$11 per plug.
- Labor savings: The main benefit of a DIY job is avoiding the high labor costs associated with a professional shop.
- Difficulty: Replacing spark plugs can be challenging on an F-150, especially if you have a more complex engine. The rear plugs can be difficult to reach, and if a plug breaks during removal, it can significantly increase the repair cost and complexity.
- Recommendation: If you are comfortable with basic car maintenance, this can be a great way to save money. If you are not experienced, it may be safer to pay a professional.
What year do Ford's have the spark plug problem?
If you are the owner of a Ford truck with a three-valve (3V) modular V-8 or V-10 engine built from 2004 thru 2007, you have either faced the misery of broken spark plugs-or you will.
