FORD LC3Q-9F991-AA Powerstroke Throttle Valve 2020-25 6.7L 12K

( Manufacturer Part Number: LC3Q-9F991-AA ), ( Type: Throttle Body ), ( Oe/oem Part Number: Lc3q-9f991-aa, Lc3q9f991aa, Lc3z9e926a ), ( Manufacturer Warranty: No Warranty ), ( Items Included: Throttle Valve ), ( Country Of Origin: United States ), ( Fuel Type: Diesel )

Review FORD 2020 25 6.7l Powerstroke Throttle Valve 12k Miles fits F-250 F-750

The **Ford LC3Q-9F991-AA Throttle Valve** is a critical component of the **2020 2025 Ford F-250 and F-750 Super Duty trucks** equipped with the **6.7L Power Stroke diesel engine**, ensuring optimal performance, fuel efficiency, and emissions compliance. This high-performance throttle body is engineered to precisely regulate airflow into the engine, maintaining the ideal air-fuel mixture for smooth operation under varying load conditions. Designed with Ford s advanced **EcoBoost and SelectShift technologies**, this throttle valve integrates seamlessly with the **EEC (Electronic Engine Control) system**, allowing for dynamic adjustments to throttle position in real-time to enhance throttle response, reduce turbo lag, and improve overall engine efficiency.

Constructed from durable **high-grade aluminum and reinforced polymer materials**, the LC3Q-9F991-AA is built to withstand the demanding conditions of heavy-duty trucking, including extreme temperatures, high RPMs, and prolonged use under heavy loads. The valve features a **precision-machined actuator mechanism** that ensures smooth and responsive operation, minimizing wear while maximizing durability. Its **OEM-quality seals and gaskets** prevent leaks and maintain a consistent vacuum or pressure seal, which is essential for maintaining proper engine performance and preventing issues like rough idling or hesitation. Additionally, this throttle valve is designed to meet **EPA and CARB emissions standards**, ensuring compliance with the latest environmental regulations while delivering reliable power output.

For technicians and enthusiasts upgrading or replacing a faulty throttle valve, the **LC3Q-9F991-AA** offers a direct OEM replacement that restores factory specifications, eliminating common symptoms such as **stalling, poor acceleration, or check engine lights** triggered by faulty airflow sensors or actuator failures. Its **plug-and-play compatibility** with the **6.7L Power Stroke s electronic throttle control (ETC) system** makes installation straightforward, requiring minimal adjustments to the vehicle s calibration. Whether used in **towing applications, off-road adventures, or daily driving**, this throttle valve ensures that the engine operates at peak efficiency, delivering the robust torque and reliability expected from Ford s legendary diesel platform. With its **long-term durability and precision engineering**, the LC3Q-9F991-AA is an indispensable part of maintaining the performance and longevity of the **F-250 and F-750 Super Duty trucks** in the 2020 2025 model years.

### **Pros and Cons of Buying a 2020-2025 Ford F-250/F-750 6.7L Powerstroke with LC3Q-9F991-AA Throttle Valve**

#### **Pros**

1. **Power and Performance**

The 6.7L Powerstroke is a robust diesel engine known for strong torque (up to 930 lb-ft in later models), making it ideal for heavy towing, hauling, and off-road use. The turbocharged direct-injection system ensures reliable power delivery, even under demanding conditions.

2. **Durability and Reliability**

Ford s 6.7L Powerstroke has a reputation for longevity when properly maintained. The engine block is cast iron, and key components like the turbocharger and fuel system are designed for durability. Many owners report minimal issues if serviced regularly.

3. **Towing and Payload Capacity**

The F-250/F-750 platforms are built for heavy-duty work, with towing ratings exceeding 12,000 lbs (depending on configuration) and payload capacities suitable for commercial or personal use. This makes it a strong choice for truck owners needing serious capability.

4. **Modern Technology and Features**

Later-model F-Series trucks (2020 ) come with advanced driver-assistance systems (like Ford Co-Pilot360), improved infotainment (SYNC 4 with wireless Apple CarPlay/Android Auto), and enhanced safety features. The 12-inch touchscreen and available Pro Trailer Backup Assist are particularly useful for towing.

5. **Resale Value**

The 6.7L Powerstroke holds its value better than some competitors, especially in the heavy-duty segment. The F-250/F-750 platforms are also in high demand, which can help with resale if you upgrade later.

6. **Availability of Parts and Support**

As a Ford, this truck benefits from a vast network of dealerships, mechanics, and aftermarket support. The 6.7L engine has been in production long enough that parts are widely available, reducing downtime for repairs.

7. **Throttle Valve (LC3Q-9F991-AA) Replacement**

The throttle valve is a common failure point in older Powerstrokes, but replacing it (as in this case) is a proactive step that can prevent engine damage. A new throttle valve improves fuel efficiency, reduces rough idling, and prevents potential long-term issues like fuel pump failure.

8. **Fuel Efficiency (Compared to Gas Engines)**

While not as efficient as some modern diesel competitors, the 6.7L Powerstroke still offers better MPG than a comparable gas V8, especially in highway driving. This can be cost-effective for long-distance hauling.

9. **Customization Options**

The F-250/F-750 platforms allow for extensive customization, from bed liners and lift kits to performance upgrades. The aftermarket support for diesel trucks is robust, offering everything from exhaust systems to transmission modifications.

10. **Comfort and Refined Ride (Compared to Older Models)**

Later-model F-Series trucks have significantly improved ride quality, noise insulation, and interior comfort. The suspension tuning is better suited for both on-road and light off-road use.

---

#### **Cons**

1. **Higher Upfront Cost**

The 6.7L Powerstroke, especially in a 2020-2025 F-250/F-750, is more expensive than a comparable gas-powered truck. The base price is already high, and adding features like a crew cab, extended bed, or heavy-duty towing package will increase the cost further.

2. **Maintenance and Repair Costs**

While the engine is durable, diesel trucks require more frequent and costly maintenance than gas engines. Items like fuel filters, air filters, turbocharger servicing, and EGR cooler replacements add up. The 6.7L Powerstroke is also more complex than a gas V8, which can increase labor costs for repairs.

3. **Common Issues with the 6.7L Powerstroke**

- **Turbocharger Failures**: The turbo is a known weak point, especially in high-mileage or heavily used trucks. Upgrades like a high-flow turbo or supporting mods (like a larger intercooler) may be needed.

- **EGR System Problems**: The Exhaust Gas Recirculation system can clog, leading to reduced performance and potential engine damage if ignored.

- **Oil Consumption**: Some owners report increased oil burn, which can lead to frequent oil changes and potential engine wear if not addressed.

- **Transmission Issues**: The 10-speed automatic transmission (in later models) has had some reports of rough shifting or premature wear, though Ford has made improvements.

- **Electrical Gremlins**: Like many modern trucks, the F-Series can have electrical issues, particularly with sensors and wiring harnesses.

4. **Fuel Costs**

Diesel fuel is more expensive than gasoline per gallon, and while the 6.7L Powerstroke is efficient, the cost of fuel can add up over time, especially for high-mileage use.

5. **Resale Depreciation**

While the 6.7L Powerstroke holds value better than some diesels, it still depreciates over time. If you plan to upgrade in a few years, the resale value may not fully offset the initial investment.

6. **Weight**

The F-250/F-750 is a heavy truck, even without a heavy load. This can affect fuel efficiency, handling, and maneuverability, especially in urban or tight spaces.

7. **Limited Off-Road Capability (Without Mods)**

While capable of light off-roading, the stock F-250/F-750 is not designed for extreme off-road use. Upgrades like a lift kit, skid plates, and all-terrain tires are often necessary for serious off-roading.

8. **Noise and Vibration**

Diesel engines are inherently louder and more vibration-prone than gas engines. The 6.7L Powerstroke, while quieter than older models, still has a distinct diesel growl and can feel rough at idle if not properly tuned.

9. **Dependence on Dealership for Some Repairs**

Complex issues, such as transmission or engine diagnostics, may require a dealership visit, which can be costly compared to independent mechanics.

10. **Throttle Valve Replacement Limitations**

While replacing the throttle valve is a good fix for immediate issues, it does not address underlying problems like fuel pump failure or turbocharger wear. If the truck has high mileage or a history of neglect, other major components may need attention soon.

---

### **Conclusion**

The **2020-2025 Ford F-250/F-750 with a 6.7L Powerstroke and a new throttle valve (LC3Q-9F991-AA)** is an excellent choice for buyers who prioritize **power, towing capability, durability, and modern features**. The throttle valve replacement is a smart preventive measure that can extend the engine s life and improve performance. However, the truck comes with **higher upfront and maintenance costs**, as well as potential long-term issues like turbocharger wear, EGR problems, and oil consumption.

- **Heavy-duty towing and hauling** (construction, farming, RV use).

- **Owners who can afford and maintain a diesel engine** (regular oil changes, fuel system maintenance, turbo servicing).

- **Those who value reliability and longevity** over fuel efficiency or low operating costs.

- **Buyers who want a truck with modern tech and comfort** (SYNC 4, Pro Trailer Backup Assist, etc.).

- **Budget-conscious buyers** who cannot handle higher maintenance costs.

- **Urban drivers** who prioritize fuel efficiency and low operating costs.

- **Owners who plan to use the truck lightly** (e.g., daily commuting with minimal towing).

- **Those who dislike diesel noise or vibration**.

---

### **Recommendation**

- You need a **heavy-duty truck for towing, hauling, or work-related use**.

- You are prepared for **regular maintenance** (every 5,000-7,500 miles, including fuel and air filter changes, turbo inspections, and EGR cleaning).

- You want a **modern, feature-rich truck** with good resale value.

- You have **budgeted for potential future repairs** (turbo upgrades, transmission servicing, etc.).

- The **throttle valve replacement is part of a broader maintenance plan** (not just a band-aid for a neglected engine).

- You cannot afford the **higher upfront cost** or **ongoing maintenance expenses**.

- You will **not use the truck heavily** (diesel engines are best for high-mileage use).

- You are uncomfortable with **diesel-specific repairs** (turbo, fuel system, EGR).

- The truck has **high mileage (over 100,000 miles) without a full service history**, as hidden issues may arise soon.

This truck is a

Details:

In working order. 2020, 2021, 2022, 2023, 2024, 2025, 2026. 2020 25 FORD F-250 - F-750 6.7L POWERSTROKE THROTTLE VALVE LC3Q-9F991 12k Miles. Fits: Ford F-250 Super Duty.

Ford F-350 Super Duty.

part #: lc3q9f991 prices

• $108.00-$185.00

specifications throobo:

• for models: F-250, F-750
• for makes: Ford
• mpn: Lc3q-9f991-aa
• type: Throttle Body
• oe/oem part number: Lc3q-9f991-aa, Lc3q9f991aa, Lc3z9e926a
• manufacturer warranty: No Warranty
• items included: Throttle Valve
• country of origin: United States
• fuel type: Diesel

returns throobo:

• policy: No Returns

shipping throobo:

• cost: $0.00
• class: Economy
• service: Economy
• type: Fixed
• transit: 4-8 Days

offer throobo:

• options: Ship-to-home
• quantity: 1
• best offers: True
• started: February 22, 2026
• availability: In Stock
• sold: 0

general throobo:

• Car Truck Parts Accessories > Air Fuel Delivery > Throttle Bodies
• condition: Used

seller throobo:

• # reviews: 970
• city: Gaines, Michigan
• rating: 99.7%

payments throobo:

• wallet: Apple-pay
• credit card: Visa
• other

Ford LC3Q-9F991 Is Similar To:

• 022-00-016b Boomba Racing Throttle Body Spacer Black For Ford 753760203616 (28.7% similar) This spacer adds volume to your intake plenum. The spacer also includes a 1/8 not port that can be used for variety of purposes. Bombay racing throttle body spacer black for ford focus st made from premium billet aluminum, is excited to announce our spacers. This has been shown to aide in cylinder ...(August 4th, 2018)
• 022-00-016blue Boomba Racing Throttle Body Spacer Blue For Ford 753760203623 (29.6% similar) In the picture shown above, you can see Dino charts of this spacer paired with our intake manifold and gains are tremendous. Bombay racing throttle body spacer blue for ford focus st made from premium billet aluminum, is excited to announce our spacers. Over 30 ft lbs of torque in using both spacers...(April 8th, 2018)
• 022-00-016n Boomba Racing Throttle Body Spacer Silver For Ford 753760203630 (31% similar) Please see the for information regarding shipping costs and available methods. This has been shown to aide in cylinder filling at lower rpm, smooth out throttle response, build boost sooner, and length en the effective wave pulse of intake charge. In the picture shown above, you can see Dino charts...(August 4th, 2018)
• 025-00-009b Boomba Racing Throttle Body Spacer Black For Ford 753760204217 (28.7% similar) Please see the for information regarding shipping costs and available methods. Purchase from map to receive aggressive pricing and retain your manufacturers warranty. This spacer adds volume to your intake plenum. In the picture shown above, you can see Dino charts of this spacer paired with our ...(December 6th, 2018)
• 025-00-009blue Boomba Racing Throttle Body Spacer Blue For Ford 753760204224 (29.6% similar) Exclusively for this has been shown to aide in cylinder filling at lower rpm, smooth out throttle response, build boost sooner, and length en the effective wave pulse of intake charge. The spacer also includes a 1/8 not port that can be used for variety of purposes. Purchase from map to receive ...(November 26th, 2018)
• 025-00-009r Boomba Racing Throttle Body Spacer Red For Ford 753760204248 (25.5% similar) This spacer adds volume to your intake plenum. Please see the for information regarding shipping costs and available methods. Purchase from map to receive aggressive pricing and retain your manufacturers warranty. In the picture shown above, you can see Dino charts of this spacer paired with our ...(November 26th, 2018)
• 025-00-011b Boomba Racing Throttle Body Spacer Black For Ford 753760204293 (27.5% similar) In the picture shown above, you can see Dino charts of this spacer paired with our intake manifold and gains are tremendous. Please see the for information regarding shipping costs and available methods. Over 17 ft lbs of torque on our fiesta st in using both spacers and a significant change the ...(November 26th, 2018)
• 025-00-011blue Boomba Racing Throttle Body Spacer Blue For Ford 753760204309 (28.4% similar) The spacer also includes a 1/8 not port that can be used for variety of purposes. This spacer adds volume to your intake plenum. It ships with a plug in the port for those not wanting to use. Over 17 ft lbs of torque on our fiesta st in using both spacers and a significant change the horsepower ...(November 26th, 2018)
• 025-00-011n Boomba Racing Throttle Body Spacer Silver For Ford 753760204316 (29.8% similar) Over 17 ft lbs of torque on our fiesta st in using both spacers and a significant change the horsepower curve. This spacer adds volume to your intake plenum. In the picture shown above, you can see Dino charts of this spacer paired with our intake manifold and gains are tremendous. It ships with a ...(November 26th, 2018)
• 025-00-011r Boomba Racing Throttle Body Spacer Red For Ford 753760204323 (24.2% similar) Over 17 ft lbs of torque on our fiesta st in using both spacers and a significant change the horsepower curve. In the picture shown above, you can see Dino charts of this spacer paired with our intake manifold and gains are tremendous. This has been shown to aide in cylinder filling at lower rpm, ...(November 16th, 2018)
• 025-00-025b Boomba Racing Throttle Body Spacer Black For Ford 753760204415 (28.7% similar) It ships with a plug in the port for those not wanting to use. This spacer adds volume to your intake plenum. This has been shown to aide in cylinder filling at lower rpm, smooth out throttle response, build boost sooner, and length en the effective wave pulse of intake charge. Purchase from map to...(May 6th, 2018)