New Ford Explorer St – Performance Tuning And Maintenance Guide
The new Ford Explorer ST is a high-performance SUV that combines a 400-horsepower twin-turbo V6 with the practical utility of a three-row family hauler. This guide provides a deep dive into maintaining, troubleshooting, and upgrading your ST to ensure it delivers peak performance on the road and the trail.
Owning a performance vehicle means you are likely looking for more than just a way to get from point A to point B. You want a machine that responds to your input, handles corners with precision, and provides a reliable platform for family adventures.
Whether you are a seasoned DIY mechanic or a first-time owner, understanding the nuances of the new ford explorer st is essential for longevity. We will explore the technical specifications, common maintenance tasks, and the best performance modifications available today.
By the end of this guide, you will have a comprehensive roadmap for keeping your SUV in showroom condition while unlocking its hidden potential. Let’s get under the hood and see what makes this modern EcoBoost powerhouse tick.
Mastering the Powertrain of the new ford explorer st
The heart of this vehicle is the 3.0L EcoBoost V6 engine, a twin-turbocharged marvel that produces 400 horsepower and 415 lb-ft of torque. Unlike standard SUVs, this powertrain is tuned for aggressive delivery and sustained high-speed performance.
The engine utilizes a compacted graphite iron (CGI) cylinder block, which is significantly stronger and lighter than traditional grey iron. This allows the engine to handle the high boost pressures generated by the twin turbochargers without sacrificing structural integrity.
Mated to this engine is the 10R80 10-speed automatic transmission, which offers a wide gear ratio spread to keep the engine in its power band. This transmission is designed to learn your driving habits, adjusting shift points based on how aggressively you use the throttle.
The Intelligent 4WD System
The AWD system in this SUV is rear-biased, meaning it sends most of the power to the back wheels under normal driving conditions. This provides a more athletic, sporty feel that enthusiasts appreciate during spirited driving.
When the sensors detect wheel slip, the system can transfer up to 50% of the torque to the front wheels almost instantaneously. This makes it an excellent choice for those who deal with variable weather or light off-road trails.
For the DIYer, it is important to remember that this system relies on a Transfer Case and a Rear Differential. Both require periodic fluid inspections to prevent premature wear, especially if you frequently tow heavy loads.
Essential Maintenance: Keeping the EcoBoost Healthy
Regular maintenance is the baseline for any performance vehicle, and the new ford explorer st is no exception. Because turbochargers generate immense heat, the quality of your engine oil is your first line of defense against engine failure.
We recommend using a high-quality 5W-30 full synthetic oil that meets the Ford WSS-M2C961-A1 specification. Synthetic oil resists thermal breakdown much better than conventional oil, protecting the delicate turbocharger bearings during high-heat cycles.
You should aim for an oil change interval of every 5,000 miles, rather than the 7,500 or 10,000 miles often suggested by the onboard monitor. Frequent changes prevent the buildup of carbon deposits on the intake valves, a common issue in direct-injection engines.
DIY Oil Change Steps
- Remove the plastic under-tray using a 7mm socket and a trim removal tool to access the oil pan.
- Locate the 15mm drain plug and position your catch pan carefully to avoid a mess.
- Replace the oil filter with a Motorcraft FL-2062-ST or a high-performance equivalent.
- Refill with 6.0 quarts of 5W-30 synthetic oil and check the dipstick for accuracy.
Always inspect the drain plug gasket for tears or flattening. Replacing this inexpensive part during every oil change is a simple way to prevent annoying leaks on your driveway.
Air Filter and Intake Care
The 3.0L EcoBoost needs to breathe freely to maintain its 400-hp rating. Check your air filter every 12,000 miles, or more frequently if you live in a dusty environment or enjoy off-road excursions.
A clogged filter forces the turbos to work harder, increasing exhaust gas temperatures (EGTs) and reducing fuel efficiency. Upgrading to a high-flow dry-panel filter can provide a slight increase in throttle response without compromising filtration.
Performance Upgrades for the new ford explorer st
While 400 horsepower is impressive, the new ford explorer st has significant “headroom” for more power. The most common first modification is an aftermarket ECU tune, which can safely add 50 to 100 horsepower.
A tune optimizes the air-fuel ratios, increases boost pressure, and sharpens the transmission’s shift logic. Companies like Steeda and ZFG Racing are well-known in the community for providing reliable, high-output calibrations.
Keep in mind that tuning your vehicle may affect your factory warranty. Always use a reputable tuner and consider a “flash” device that allows you to return the car to the stock settings before dealership visits.
Intercooler Upgrades: Fighting Heat Soak
The stock intercooler on the Explorer ST is known to be undersized for aggressive driving. After just a few hard pulls, the intake air temperatures (IATs) can skyrocket, causing the ECU to pull timing and reduce power.
Installing a larger, front-mounted intercooler (FMIC) is one of the most effective ways to maintain consistent performance. A high-quality intercooler will have a larger core volume and better fin density to dissipate heat more effectively.
This is a moderately difficult DIY project that requires removing the front bumper cover. However, the reward is a vehicle that feels just as fast on the tenth pull as it did on the first one.
Exhaust Systems and Sound
The factory exhaust is relatively quiet, which is great for family trips but underwhelming for enthusiasts. A “cat-back” exhaust system can provide a deeper, more aggressive growl without causing interior drone.
Look for systems that utilize 3-inch stainless steel piping and high-flow mufflers. This not only improves the sound but also reduces backpressure, allowing the turbos to spool up slightly faster.
Handling and Braking: Managing the Weight
The new ford explorer st weighs nearly 4,700 pounds, which is a lot of mass to move and stop. If you have the “Street Pack” or “High Performance Pack,” your vehicle came with larger Brembo-derived brakes.
Even with these upgrades, the stock brake pads can fade during heavy use. For those who enjoy mountain road driving or occasional track days, upgrading to a ceramic-metallic pad can provide better bite and higher heat resistance.
When replacing brake fluid, use a high-boiling-point DOT 4 fluid. This prevents the “spongy” pedal feel that occurs when the brake fluid gets too hot and begins to boil under pressure.
Suspension and Body Roll
Despite being a performance SUV, the ST still has a fair amount of body roll due to its high center of gravity. Installing a set of lowering springs can drop the ride height by about 1 to 1.5 inches.
This lower stance improves the look of the vehicle and significantly reduces body roll during cornering. Pair these springs with upgraded sway bars to further flatten the chassis during aggressive maneuvers.
Remember that changing your suspension geometry requires a professional wheel alignment. Failure to align the vehicle will lead to rapid tire wear and unpredictable handling characteristics at high speeds.
Off-Roading and Towing with the ST
While the new ford explorer st is primarily a street-focused machine, it is surprisingly capable when the pavement ends. The Intelligent 4WD system includes a “Deep Snow/Sand” mode that adjusts traction control for loose surfaces.
If you plan on taking your ST off-road, consider swapping the low-profile street tires for a set of high-performance All-Terrain tires. This provides much better sidewall protection and grip in the dirt.
Be cautious of the front air dam, which sits low and can be easily damaged by rocks or steep inclines. Always scout your path and avoid deep mud that could clog the radiator or intercooler fins.
Towing Capabilities
The Explorer ST is rated to tow up to 5,600 pounds when equipped with the Class IV Trailer Tow Package. This makes it an ideal vehicle for towing boats, jet skis, or small campers.
When towing, always use the “Tow/Haul” mode on the drive dial. This mode changes the transmission shift points to prevent gear hunting and uses engine braking to help slow the vehicle on downhill grades.
Check your trailer hitch bolts annually for tightness. The vibrations from towing can occasionally loosen the mounting hardware, which poses a significant safety risk on the highway.
Common Troubleshooting and Known Issues
No vehicle is perfect, and the new ford explorer st has a few known quirks that owners should watch for. One common complaint is a “harsh shift” from the 10-speed transmission, particularly between 3rd and 4th gear.
In many cases, a dealership can resolve this with a PCM/TCM software update. This recalibrates the adaptive learning process and usually smooths out the shifting performance significantly.
Another issue some owners face is a rattling sound from the exhaust heat shields. These can often be fixed by tightening the mounting clips or adding a small amount of high-temp RTV silicone to dampen the vibration.
Infotainment and Electronics
The vertical 10.1-inch touchscreen is a standout feature, but it can occasionally freeze or lag. If this happens, you can perform a “soft reset” by holding the Volume Down and Seek Right buttons on the steering wheel.
Ensure your vehicle is connected to Wi-Fi periodically to download Over-The-Air (OTA) updates. Ford frequently releases patches that improve system stability and add new features to the Sync 4 interface.
If you experience persistent electrical issues, check the battery terminals for corrosion. Modern SUVs are very sensitive to voltage drops, and a loose or dirty connection can trigger a cascade of “ghost” warning lights.
Frequently Asked Questions About new ford explorer st
Does the new ford explorer st require premium fuel?
To achieve the advertised 400 horsepower and 415 lb-ft of torque, Ford recommends using 91 octane or higher. While the vehicle can run on 87 octane, the ECU will retard timing to prevent knock, resulting in reduced power and efficiency.
How can I improve the fuel economy of my ST?
While it is a performance SUV, you can maximize MPG by using Eco Mode and maintaining proper tire pressure. Ensure your air filter is clean and avoid carrying unnecessary weight in the cargo area to reduce the load on the engine.
Is the Explorer ST good for winter driving?
Yes, the Intelligent AWD system and dedicated “Slippery” mode make it very capable in the snow. However, for the best performance, we recommend switching to a dedicated winter tire, as the stock summer tires lose grip significantly below 45 degrees Fahrenheit.
What is the “Street Pack” on the Explorer ST?
The Street Pack includes 21-inch aluminum wheels, performance brakes with red calipers, and specialized brake pads. It is designed for owners who want the best possible stopping power and a more aggressive aesthetic.
Can I install a lift kit on my Explorer ST?
Yes, several companies offer 1-2 inch lift kits for the current Explorer platform. This can provide better ground clearance for off-roading, though it may slightly increase body roll during high-speed cornering on the street.
Final Thoughts on the ST Experience
The new ford explorer st is a rare breed of vehicle that manages to be many things to many people. It is a comfortable commuter, a capable tow rig, and a genuine performance machine that can embarrass many sports cars at a stoplight.
By following a strict maintenance schedule and choosing your upgrades wisely, you can enjoy this SUV for many years. Remember to always prioritize safety when performing your own repairs and don’t hesitate to consult a professional for complex tasks like timing adjustments.
Whether you are carving through canyon roads or heading out on a cross-country family road trip, your ST is built to handle the challenge. Stay proactive with your maintenance, keep an eye on your tire pressures, and most importantly, enjoy the drive!
Stay safe, keep the shiny side up, and enjoy the incredible power of your EcoBoost SUV!
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