2017 Ford Mustang Convertible Ecoboost Premium
The 2017 Ford Mustang EcoBoost Premium convertible offers a unique blend of turbocharged efficiency, modern interior luxury, and the classic open-air driving experience that defines the American pony car. This comprehensive guide provides owners and DIY mechanics with actionable insights into maintaining the 2.3L engine, caring for the soft top, and selecting the best performance upgrades for the S550 platform.
Owning a 2017 ford mustang convertible ecoboost premium means balancing the needs of a high-tech turbocharged engine with the specific maintenance requirements of a drop-top chassis. Many owners struggle with specific issues like carbon buildup on intake valves or hydraulic leaks in the convertible mechanism.
You want your Mustang to stay reliable while delivering that signature punchy torque whenever you hit the gas. This article will walk you through the essential DIY steps, safety precautions, and expert tips to ensure your car remains a head-turner on the road.
Whether you are performing your first oil change or planning a full suspension overhaul for better cornering, we have you covered. Let’s dive into the technical details and practical solutions that keep this modern classic running at its peak.
Understanding the 2.3L EcoBoost Powertrain
The heart of this Mustang is the 2.3-liter turbocharged four-cylinder engine, which produces a respectable 310 horsepower and 320 lb-ft of torque. It utilizes a twin-scroll turbocharger to minimize lag and provide a broad powerband that feels surprisingly muscular.
Because this is a Gasoline Direct Injection (GDI) engine, fuel is sprayed directly into the combustion chamber rather than over the intake valves. This design improves efficiency but can lead to carbon deposits forming on the back of the valves over time.
To mitigate this, many enthusiasts install an oil catch can. This device intercepts oil vapors from the PCV system before they can reach the intake manifold, keeping your engine breathing clean air and maintaining performance.
The Importance of High-Quality Fuel
While Ford states you can run the EcoBoost on 87-octane fuel, doing so will cause the ECU to pull timing to prevent knock. This results in a noticeable loss of horsepower and torque, especially in hot weather.
For the best experience, always use 91 or 93-octane premium fuel. This allows the turbocharger to reach its full boost potential without the engine computer intervening to protect the internals.
Using top-tier detergent gasoline also helps keep the fuel injectors clean. Since GDI injectors operate under extreme pressure, any clogging can lead to poor atomization and “rough idle” issues.
Maintaining Your 2017 ford mustang convertible ecoboost premium
Regular maintenance is the key to longevity for any turbocharged vehicle. The 2017 ford mustang convertible ecoboost premium requires a more proactive approach than the naturally aspirated V8 models due to the heat generated by the turbo.
Change your oil every 5,000 miles rather than the 10,000-mile interval often suggested by the onboard monitor. Use a high-quality 5W-30 full synthetic oil that meets Ford’s WSS-M2C946-A specification to ensure maximum protection.
Always replace the oil filter with a Motorcraft FL-910S or a high-performance equivalent. A cheap filter can restrict flow, which is dangerous for the turbocharger’s bearings that rely on a steady stream of pressurized oil.
Spark Plug Maintenance and Gapping
Turbocharged engines are hard on spark plugs. The high cylinder pressures can “blow out” the spark if the gap is too wide, leading to misfires under heavy acceleration.
Check your spark plugs every 20,000 miles. For a stock engine, a gap of 0.028 to 0.030 inches is usually ideal. If you have an aftermarket tune, you may need a tighter gap or a colder heat range plug.
When installing new plugs, always use a calibrated torque wrench. Over-tightening can crack the porcelain, while under-tightening can lead to compression leaks or even “spitting” a plug out of the cylinder head.
The Low-Side Fuel Pressure Sensor
A common failure point on the 2017 EcoBoost is the low-side fuel pressure sensor. When this part fails, the car may stumble, lose power, or throw a check engine light (CEL).
Replacing this sensor is a simple DIY task that takes about 15 minutes. It is located on the fuel rail and can be swapped with basic hand tools once the fuel system pressure is relieved.
Upgrading to the latest revised part number from Ford (often ending in “BU”) can prevent future stalling issues. This is a cheap insurance policy for your engine’s fuel delivery system.
Convertible Top Care and Troubleshooting
The convertible top is what makes the 2017 ford mustang convertible ecoboost premium so special, but it requires specific attention. The fabric and the mechanical linkages are exposed to the elements and mechanical stress.
Wash the top with a dedicated convertible cleaner rather than harsh dish soaps or wax-heavy car washes. Use a soft horsehair brush to gently lift dirt from the fabric weave without fraying the material.
After cleaning, apply a fabric protectant like 303 High Tech Fabric Guard. This creates a hydrophobic barrier that makes water bead off and protects the black dye from fading under intense UV rays.
Clearing the Drain Holes
One of the most critical maintenance tasks for a convertible is clearing the body drains. These are located near the rear quarter panels and under the storage area for the top.
If these drains clog with leaves or debris, water will back up into the cabin or the trunk. This can damage the Smart Junction Box (SJB) or other sensitive electronics located in the footwells.
Use a piece of flexible weed-whacker line to gently poke through the drains and ensure water flows freely. Never use high-pressure air, as this can disconnect the internal drain tubes from their fittings.
Lubricating the Hinges and Seals
The mechanical arms of the top contain several pivot points that can become squeaky or stiff. Apply a small amount of lithium grease or a dry PTFE lubricant to these joints once a year.
Inspect the rubber weatherstripping around the windows and the windshield header. If the rubber looks dry or cracked, apply a silicone-based dressing to keep it supple.
This prevents “wind noise” at highway speeds and ensures a watertight seal during heavy rain. If you notice a leak, check the alignment of the windows before assuming the top is at fault.
Addressing Common “EcoBoom” Concerns and Safety
You may have heard the term “EcoBoom” in enthusiast forums. This refers to catastrophic engine failure, usually caused by Low-Speed Pre-Ignition (LSPI) or extreme heat soak.
LSPI occurs when you apply heavy throttle at low RPM in a high gear, such as “flooring it” in 6th gear at 60 mph. This creates massive cylinder pressure that can snap a connecting rod.
To stay safe, always downshift before accelerating hard. Keeping the engine above 3,000 RPM when requesting boost significantly reduces the stress on the internal components.
The Cooling System Weak Point
The stock intercooler on the 2017 Mustang EcoBoost is quite small. During spirited driving or on hot days, the “Charge Air Temperature” (CAT) can skyrocket, causing the car to feel sluggish.
Monitor your coolant levels regularly. The degas bottle (coolant reservoir) on S550 Mustangs is known to develop hairline cracks over time, leading to slow leaks and potential overheating.
If you see white crusty residue around the tank, replace it immediately. An aluminum aftermarket tank is a popular upgrade that eliminates this plastic failure point forever.
Braking and Suspension Safety
The Premium trim often comes with larger brakes, but they still require regular inspection. Check the inner brake pads, as they often wear faster than the outer pads due to the sliding caliper design.
When jacking up your 2017 ford mustang convertible ecoboost premium, always use the designated pinch weld points. Use a jack pad adapter to prevent bending the metal tabs.
Never work under the car supported only by a hydraulic jack. Always use heavy-duty jack stands placed on a level, concrete surface to ensure your safety while performing DIY repairs.
Performance Modifications for the S550 Platform
If you want to unlock the true potential of your Mustang, a few targeted modifications can make a massive difference. The EcoBoost engine responds very well to “bolt-on” parts.
The first upgrade should always be a larger front-mount intercooler (FMIC). This reduces intake temperatures and allows the engine to maintain consistent power even after multiple pulls.
A high-flow drop-in air filter or a dedicated cold air intake can improve throttle response and add a bit of “turbo spool” sound to the driving experience.
Tuning the ECU
A handheld tuner, such as the Cobb Accessport, is the most effective way to gain horsepower. A simple Stage 1 tune can add 30-50 lb-ft of torque without any other modifications.
For those worried about their warranty, the Ford Performance Calibration is a great middle ground. It provides a significant boost in low-end torque and is backed by a limited powertrain warranty when installed by a dealer.
Keep in mind that tuning increases the load on your spark plugs and cooling system. Always ensure your maintenance is up to date before flashing a new map to your car’s computer.
Handling Upgrades
Convertibles have slightly more chassis flex than coupes. Installing a strut tower brace and “K-brace” can help stiffen the front end and improve steering precision.
Upgrading to a set of lowering springs not only improves the stance but also lowers the center of gravity. This reduces body roll during aggressive cornering on backroads.
If you want a more comfortable ride, look into “Vertical Links” for the rear suspension. These replace the stock rubber bushings with spherical bearings, reducing “wheel hop” during hard launches.
The Premium Interior and Electronics Maintenance
The “Premium” part of the 2017 ford mustang convertible ecoboost premium name refers to the leather-trimmed seats, SYNC 3 infotainment system, and selectable drive modes.
Keep the leather seats conditioned to prevent cracking, especially since they are often exposed to direct sunlight with the top down. Use a product with UV blockers to maintain the leather’s softness.
The SYNC 3 system is generally reliable, but it may occasionally lag. You can perform a “Master Reset” in the settings menu or update the software via a USB drive from Ford’s owner website.
Testing the Battery and Alternator
Modern Mustangs are very sensitive to voltage drops. If your battery is more than three years old, it may cause strange electrical gremlins, like flickering screens or “Service AdvanceTrac” warnings.
Clean the battery terminals with a wire brush and apply a thin layer of terminal protector. Ensure the Battery Management System (BMS) sensor on the negative cable is securely connected.
If you replace the battery, the car needs to “re-learn” the new battery’s state of charge. You can do this by letting the car sit undisturbed for 8 hours or using a diagnostic tool to reset the BMS.
Frequently Asked Questions About the 2017 Ford Mustang Convertible EcoBoost Premium
Is the 2017 EcoBoost Mustang reliable for a daily driver?
Yes, the 2017 model is generally very reliable if you follow a strict maintenance schedule. Most major issues stem from poor fuel quality or “lugging” the engine in high gears. With regular oil changes and spark plug swaps, these engines can easily pass 100,000 miles.
Can I put a car seat in the back of the convertible?
While the Mustang has LATCH points in the rear seats, the space is very tight. Front-facing seats fit better than rear-facing ones. The convertible actually makes it easier to load a child into the seat when the top is down, but front-passenger legroom will be compromised.
How do I fix a vibrating steering wheel at highway speeds?
This is often caused by unbalanced tires or “flat-spotting” if the car has been sitting. Have a shop perform a road-force balance on your wheels. If the vibration persists, inspect the inner and outer tie rods for any play or wear.
Does the EcoBoost Premium have a limited-slip differential?
Most EcoBoost Premium models come with a 3.31 or 3.55 ratio limited-slip rear axle. This helps distribute power to both rear wheels, improving traction during acceleration. You can check the “Axle Code” on the door jamb sticker to verify your specific gear ratio.
Final Thoughts on Owning a 2017 Mustang Convertible
The 2017 ford mustang convertible ecoboost premium is a fantastic machine for those who want style and technology without the high fuel costs of a V8. By staying on top of small tasks like drain cleaning and sensor replacement, you prevent the large headaches that catch other owners off guard.
Remember that a turbocharged car is only as good as the care it receives. Use the right oil, feed it premium fuel, and listen to what the chassis is telling you. Whether you’re cruising the coast or carving through a mountain pass, your Mustang is ready to perform.
Take pride in your DIY maintenance and don’t be afraid to reach for the wrenches. Stay safe, keep the rubber side down, and enjoy every mile of open-air freedom!
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