Key Takeaways
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The 2011+ 6.7L Powerstroke is highly capable but suffers from specific issues like throttle lag and restrictive emissions programming.
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Preventative mods, such as a CP4 disaster prevention kit and an aluminum cold side charge pipe, are essential to avoid catastrophic engine failure.
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Upgrading early models (2011-2014) with a 2015+ OEM turbocharger retrofit vastly improves spool times, durability, and towing performance.
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The Pedal Commander® Throttle Response Controller is a warranty-safe, plug-and-play solution that entirely eliminates drive-by-wire throttle lag.
The 6.7-liter Powerstroke turbodiesel V8 has been the range-topping powertrain for Ford’s Super Duty trucks since 2011. It powers the F250, F350, and the F450, delivering big torque for heavy-duty work, and enough power to tackle every on- or off-road driving.
Previous iterations of the Powerstroke were developed by International Truck and Engine Corporation. The 6.7-liter turbodiesel V8 is the first Powerstroke engine that’s engineered and built in-house by Ford. While the new powerplant is robust, reliable, and strong, it may have a few issues here and there down the road.
The fuel pump, for example, may go bad causing catastrophic repair bills. Earlier Powerstrokes (2011-2014) have a weak turbocharger that cause issues under stress. Other than these, since being a turbocharged engine, squeezing big power out of the Powerstroke is quite easy with ECU tuning.
Photo by Richard Gonzales on Unsplash
We have compiled the best mods for the 6.7L Powerstroke V8 turbodiesel that address these reliability issues and increase power, improve fuel efficiency, and boost the throttle response for better driving.
Ford 6.7L Powerstroke V8 Performance Upgrades
Cold Air Intake Kits
A cold air intake kit replaces the restrictive factory air box and paper air filter. These kits improve the air flow and allow the engine to draw colder air.
Colder and less restricted air improves combustion, resulting in power gains (albeit minimal). Cold air intake kits increase the airflow to the turbocharger, lower the intake air temperature, and can even improve fuel economy under certain driving conditions.
A cold air intake also makes the turbo noises more audible — a cool bonus if you enjoy the whistling sound a turbocharger makes while spooling.
Performance Exhaust Systems
The factory exhaust system on the Powerstroke Super Duty trucks creates a considerable amount of back pressure. This causes the Powerstroke engine to work harder.
A less-restrictive downpipe and a freer-flowing exhaust piping/silencers reduce back pressure and Exhaust Gas Temperature (EGT). With reduced back pressure, you get less turbo lag, more power, and better acceleration. Lower EGT means your engine will handle less thermal stress, improving its longevity.
Performance systems also enhance the exhaust note. Another bonus for those who love a good sounding truck.
ECU Tuning
Tuning the ECU is one of the most effective upgrades for big power gains on a turbocharged powertrain, and Ford’s Powerstroke is no different. A good-quality tune can unlock over 100 horsepower and over 200 lb-ft of torque.
The factory software on the ECU is programmed to be conservative to meet emissions targets and make the engine reliable across a wide range of conditions. However, this programming hides a considerable amount of power.
Quality tunes are engineered with extensive testing and with dyno work. These modify turbo boost, fuel delivery, and ignition timing to increase power while maintaining the safety and reliability of the engine.
However, ECU tuning is difficult to reverse. This is a permanent upgrade unless the stock software is flashed back on, so if your truck is still under warranty and if the dealership can trace a powertrain issue back to the tune, your warranty can be partially voided.
OEM Turbocharger Retrofit (for 2011-2014 Models Only)
Ford upgraded Powerstroke’s turbocharger in 2015. The new unit comes with improved sealing, more efficient turbine wheels and compressor, and better materials. The new turbocharger is more durable and capable.
The updated turbocharger can be retrofitted to the older 2011-2014 Powerstroke engines with additional supporting parts. The retrofit improves overall performance of the engine. The updated turbocharger spools faster and can handle more boost, making power delivery smoother. The truck becomes more responsive and performs better both on daily driving and heavy duty work such as towing and hauling.
While this is not an easy bolt-on performance upgrade, it can be a good investment if your older truck’s turbocharger is wearing out, or if you’re planning other performance upgrades.
Emissions Systems Modifications (“Deleting the Truck”)
You can unlock more power and improve your truck’s reliability by deleting the emissions-related systems. These modifications are widely known as “diesel deletion” or “deleting the truck/engine”.
Diesel deletion means removing emissions control systems such as the Diesel Particulate Filter (DPF), Exhaust Gas Recirculation (EGR), and Diesel Exhaust Fluid (DEF) system. Deleting these monitoring/filtration systems improve performance and reliability because it allows the engine to breathe more freely, resulting in improved HP/TQ, stronger acceleration, and fewer emissions-related problems like clogging and regeneration cycles.
However, before deleting a diesel truck, you have to consider the legal and environmental consequences, and what you use your truck for. Removing emissions systems also increases harmful exhaust emissions, so deleting emissions equipment on vehicles driven on public roads is illegal and can lead to fines or failed emissions inspections.
You should carefully weigh the performance benefits against the legal risks and environmental impact before making a decision.
Ford 6.7L Powerstroke V8 Reliability Upgrades
CP4 Disaster Prevention
The 2011+ Powerstroke engine’s weakest link is the CP4 fuel pump. The pump is known to fail, and when it does it sends metal shavings to the entire fuel system.
This failure causes a lot of expensive components (such as the injectors or fueling lines) to be destroyed. The repair bills can easily go beyond $10,000. CP4 failure-prevention kits include a catch can that collects metal shavings if the pump fails. They also come with a bypass system designed to protect fuel system components.
A CP4 prevention upgrade does not increase the performance of your Powerstroke, but it is one of the most important modifications for engine longevity and reliability.
Cold Side Charge Pipe
The Powerstroke’s cold-side charge pipe carries pressurized cold air from the intercooler’s cold side to the intake manifold. However, it is made of plastic and can fail under high turbo boost.
When this pipe fails, the truck loses power immediately. Upgraded charge pipes are made of aluminum, and can handle significantly higher pressure without failing.
Photo by John Steinbeck on Unsplash
An upgraded cold-side charge pipe is an inexpensive preventative upgrade that will increase the Powerstroke’s reliability considerably.
Upgrading Ford 6.7L Powerstroke Throttle Response
The Powerstroke turbodiesel V8 is a powerful and torquey engine that makes the Super Duty trucks very capable in every condition. However, modern Super Duties run a drive-by-wire gas pedal. It means there is no physical connection between the gas pedal and the throttle body.
Drive-by-wire replaces the mechanical link with sensors and actuators. When you press the gas pedal, the pedal position sensor (APPS) registers a signal, sends it to the ECU, and the ECU commands an actuator to open the throttle valve at a preset rate.
What is Throttle Lag?
The speed of the throttle valve is set to a fixed rate that helps the truck meet strict emissions regulations, hit fuel efficiency targets, and be compatible for a wide range of drivers. On top of that, the ECU factors in speed, gear, RPM, and emissions before opening the throttle valve.
All this digital communication between the pedal input and the engine’s reaction creates a sluggish feel and hesitation, called throttle lag.
In a big truck that’s built to handle heavy-duty work, throttle lag becomes a drivability and safety issue, especially when you’re towing, doing farm work on a challenging surface, or merging into ongoing traffic hauling a significant load in the truck bed.
How to Fix Ford Powerstroke Throttle Lag
Some of the upgrades mentioned here help with improving throttle response.
A cold air intake kit can improve response, because the air that goes into the engine is less restricted. Less back pressure with an upgraded exhaust system also improves throttle response. A tuner can improve throttle response with modifying the ECU software, too.
However none of these upgrades can completely eliminate the restrictive factory programming of the pedal position sensor, and an ECU tune gives you a one fixed throttle response that you cannot change later on.
Pedal Commander® Throttle Response Controller: Ultimate Throttle Lag Fix
To completely eliminate the throttle lag in your Powerstroke-powered Super Duty, you have to modify the pedal position sensor signal. The Pedal Commander® throttle response controller does exactly this. It connects between the gas pedal sensor plug and the vehicle’s wiring harness, and modifies the pedal position sensor signal.
Pedal Commander® uses vehicle-specific software to recalibrate the factory signal. The modified signal overrides the factory restrictions, and the ECU can open the throttle blade at a much faster rate, and opens it at the instant you touch the gas pedal.
36 Throttle Response Settings
Unlike an ECU tune, the Pedal Commander® throttle controller gives you the ability to customize the throttle response. You get four preset modes (Eco, City, Sport, and Sport+) and nine levels for each mode. You can dial down the response in Eco for better traction on slippery surfaces or off-road conditions. You can bump up the response for daily driving in City, or increase it even more for more confident towing in Sport or Sport+.
You can dial up or down each mode with nine levels for each. That means you get 36 different throttle curves from smooth to instant.
Wireless Control and Add-On Vehicle Security
Pedal Commander® is Bluetooth-enabled, so you can stash the compact controller away and change settings wirelessly via the free mobile app.
The mobile app also allows you to use the built-in Anti-Theft feature. Once you subscribe ($0.99 a month or $9.99 a year after a 14-day free trial) and calibrate your unit for Anti-Theft, you can disable the gas pedal to turn Pedal Commander® into a seamless kill switch for the gas pedal.
Plug-and-Play, Warranty-Safe, and 50-State-Legal
Pedal Commander® throttle response controller is designed to be completely plug-and-play. Installation requires no extra tools, and only takes 15 minutes. You simply power off the truck, disconnect the gas pedal position sensor plug, and connect the Pedal Commander® harness in line.
The unit does not occupy the OBD II port unlike some of the other throttle controllers, so it does not interfere with the ECU and leaves no trace behind. If your truck has warranty, it stays intact.
On top of that, the Pedal Commander® throttle response controller is CARB-compliant, making it legal to use across all 50 states.
Compatible with Other Mods on This List
Whether you drive a completely stock Super Duty or an upgraded (or planning to upgrade) truck, the Pedal Commander® throttle response controller is compatible with all 2011+ Ford Super Duty trucks.
The unit works alongside other bolt-ons and it is actually a great add-on for any Powerstroke performance build. You get the added horsepower and torque with ECU tuning, a cold air intake, or a turbocharger retrofit; and get customizable throttle response on top of all that with Pedal Commander®.
Bring your truck’s throttle response back to life with Pedal Commander®. Order yours below!
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Frequently Asked Questions (FAQ)
What is the biggest reliability issue on the 2011+ 6.7L Powerstroke?
The CP4 fuel pump is the engine's weakest link. If it fails, it sends metal shavings through the entire fuel system, resulting in repair bills that can easily exceed $10,000. Installing a CP4 disaster prevention kit is highly recommended to catch these shavings and protect your injectors.
Why does my 6.7L Powerstroke have a delayed throttle response?
Modern Super Duty trucks use a drive-by-wire gas pedal. The engine's computer intentionally delays the throttle valve from opening instantly to meet strict emissions regulations and fuel efficiency targets, creating a sluggish feeling known as throttle lag.
How can I completely fix the throttle lag on my Super Duty?
While cold air intakes and tuning help slightly, the only way to completely eliminate throttle lag without permanent ECU modifications is by installing a throttle response controller like Pedal Commander®. It overrides the factory pedal restrictions for instant response.
Will deleting my 6.7L Powerstroke void the warranty or cause legal issues?
While "deleting" emissions systems (DPF, EGR, DEF) allows the engine to breathe freely and boosts reliability, it increases harmful exhaust emissions. Doing so on public roads is illegal, can lead to heavy fines, will cause you to fail emissions inspections, and will likely void your powertrain warranty.
