Ford 2.7 EcoBoost Engine Problems: The 3 Most Common Issues

Ford 2.7 EcoBoost Engine Problems

Ford introduced the 2.7 twin turbo EcoBoost engine in 2015, following the success of the 3.5 EcoBoost. The 2.7-liter engine produces a respectable 315-335 horsepower and 350-400 pound-feet of torque. The 2.7 EcoBoost engines lack the power of the larger 3.5 liter engines. However, it provides more than enough power for the majority of users and comes at a lower price.

While Ford’s 2.7 EcoBoost engines are excellent, no engine is without flaws. We’ll discuss some of the most common issues with the Ford 2.7 EcoBoost engine in this post, as well as its overall reliability.

2.7L EcoBoost Specs & Info

Before we get into the specifics of the Ford 2.7 engine’s problems, let’s quickly review some background information and specifications. The Ford 2.7 EcoBoost is a gasoline engine with twin turbochargers and direct injection.

Additionally, it is referred to as the 2.7L Nano engine. Consider the following 2.7 EcoBoost specifications in comparison to the 3.5 EcoBoost engine:

2.7 EcoBoost 3.5 EcoBoost
Displacement 2,694cc (2.7 liters) 3,496cc (3.5 liters)
Aspiration Twin turbo Twin turbo
Production 2015-present 2009-present
Block Material Compact Graphite Iron Aluminum
Bore x Stroke 83mm x 83mm 92.5mm x 86.6mm
Compression 10.3 : 1 10.5 : 1 and 10.0 : 1
Horsepower 315-335hp 320-647hp
Torque 350-400 lb-ft 350-550 lb-ft

Both the 2.7 and 3.5-liter Ford engines are based on the same basic V6 twin turbocharged direct injection design. Additionally, they are available on the same models, such as the Ford F-150.

However, the similarities between the 2.7 and 3.5 EcoBoost engines end there. The 2.7L features a square cylinder design and a stronger compacted graphite iron block. Additionally, the smaller 2.7 V6 EcoBoost engine produces slightly less horsepower and torque than the 3.5L engine.

1st Gen 2.7 EcoBoost

The original Ford 2.7 EcoBoost engine is available in the following models:

  • 2015-2017 Ford F-150
  • 2016-2018 Lincoln MKX
  • 2017-2020 Lincoln Continental
  • 2019-present Lincoln Nautilus
  • 2015-2018 Ford Edge Sport
  • 2019-present Ford Edge ST
  • 2017-2019 Ford Fusion Sport

2nd Gen 2.7L Nano Updates

One final point to make before delving into the 2.7 twin turbo Nano engine’s issues. In 2018, certain models will receive the Ford 2.7 EcoBoost engine from the second generation. It receives a boost to 400 lb-ft of torque.

Most significantly, Ford adds port injection to complement the engine’s existing direct injection. This has a number of advantages, including reducing carbon build-up, which is a 2.7 EcoBoost issue we’ll discuss.

Several other updates for the second generation include a high-pressure exhaust gas recirculation system, lightweight cams, and electronically controlled turbo waste-gates.

This is not an exhaustive list, but rather a selection of noteworthy updates. The Ford 2.7 EcoBoost engine from the second generation is found in the following vehicles:

  • 2018-present Ford F-150
  • 2021-present Ford Bronco

3 Common 2.7 EcoBoost Engine Problems

2.7 EcoBoost Engine

Several of the most frequently encountered issues with the Ford 2.7 EcoBoost twin turbo engine include the following:

As with the second generation 2.7L Nano engine, the carbon build-up issues affect only the first generation engines without port injection. Oil pan leaks also affect primarily the 2015–2017 1st generation engines.

We’ll be delving into each of the three Ford 2.7 EcoBoost issues in detail below. For the time being, let us add a few critical notes.

We’re referring to these as the most common issues, but that does not necessarily mean they’re widespread. Rather than that, when failures do occur, the following are some of the most common areas.

Of course, an engine can fail in a variety of other ways. This is particularly true as the 2.7L EcoBoost ages and accumulates mileage. We’ll discuss each of the aforementioned issues in detail before concluding the article with our overall thoughts on the 2.7 EcoBoost’s reliability.

1) Ford 2.7 EcoBoost Carbon Build-Up Problems

To begin, we’re going to look at an issue that affects first-generation engines. To call carbon build-up a problem with the 2.7 EcoBoost may not be entirely accurate. Indeed, nearly every direct injection (DI) engine develops carbon build-up.

Every engine experiences some degree of oil blow-by. Oil blow-by passes through the intake tract and adheres to the intake ports and valves. Port injection sprays fuel into these intake ports, washing away any oil deposits.

Due to the fact that DI sprays directly into the cylinder, no fuel is required to clean the intake ports and valves. Carbon build-up occurs when oil adheres to and hardens on the valves over time.

This restricts airflow and may result in inconsistent air delivery to the 2.7L EcoBoost cylinders. Carbon buildup is not a serious issue that requires immediate attention. Certain Ford 2.7 V6 engines may even operate without cleaning the intake valves for their entire lives.

Carbon build-up, on the other hand, can cause some drivability issues. It’s a significant enough issue that Ford addressed it by incorporating port injection into the second-generation 2.7 EcoBoost engines. Fuel washing over the intake valves prevents an excessive build-up of carbon.

*The image above is from a BMW N54 engine and serves as an illustration of how carbon build-up appears.

2.7 TT V6 Carbon Build-Up Symptoms

Excess carbon deposits on the 2.7 EcoBoost intake valves manifest themselves in the following ways:

  • Misfires
  • Rough Idle
  • Stuttering/hesitation
  • Power loss

Where problems begin are with misfires. Uneven airflow into the cylinders can result in misfires, which contributes to the remainder of the symptoms.

You may notice that the 2.7 EcoBoost engine idles harshly or accelerates with hesitation. Additionally, carbon buildup results in power loss, which can be quite significant in some cases. However, it is frequently difficult to detect because it occurs gradually over tens of thousands of miles.

Carbon deposits can impair the intake valves’ ability to fully close in extreme cases. This results in compression loss because the cylinder is not properly sealed for the combustion process.

Ford 2.7L Nano Carbon Build-Up Fix

Cleaning intake valves and ports with walnut blasting is a very common and effective method. It entails the use of walnut media shells and a powerful shop vac. There are no replacement parts required, but the intake manifold must be removed. Walnut blasting the 2.7 EcoBoost engine will most likely cost between $400 and $600.

Again, this is not a life-threatening situation, and some owners may never clean their 2.7 intake valves. Typically, carbon deposits do not pose significant reliability or longevity concerns.

However, we believe it is excellent maintenance to keep the engine running smoothly. Walnut blasting is recommended for 1st generation Ford 2.7 engine maintenance every 70,000 to 100,000 miles.

2) 2.7 EcoBoost Oil Pan Leaks

2.7 EcoBoost Oil Pan Leaks

This section will be brief. Oil pan leaks are most prevalent on the 2015–2017 1st generation 2.7L Nano engines. The oil pans are made of plastic, which is not the most attractive material. Of course, the oil pan must contain hot engine oil, and plastic expands slightly when heated. This can result in issues with the 2.7 EcoBoost oil pan’s seal to the block.

Oil will begin to leak from the Ford 2.7L engine oil pan once the sealant fails. Ford addressed the issue in 2018 with an update to the oil pan design. It’s a relatively minor issue in the grand scheme of things, given Ford’s prompt resolution. However, it’s worth noting because it’s one of the engine’s few design flaws.

Ford 2.7L V6 Oil Pan Leak Symptoms & Fix

There is little to say about symptoms. Examine the 2.7 EcoBoost for any visible oil leaks. That is a dead giveaway that oil is leaking from somewhere, and on early models, the oil pan is typically to blame.

There is a good chance that a significant number of faulty oil pans have already been replaced under warranty. Otherwise, the cost of parts and labor at a repair shop can easily exceed $500. It’s not a particularly difficult do-it-yourself project, but take care with the sealant process.

3) 2.7L EcoBoost Spark Plugs & Ignition Coils

As previously stated, it may not be accurate to refer to carbon build-up as a true problem, as it is simply a side effect of direct injection. Spark plugs and ignition coils are another area where the term “common problems” may not be accurate.

However, we’ve run out of other common issues with the Ford 2.7 EcoBoost to discuss. Wear on the spark plugs and ignition coils is a natural occurrence in turbocharged engines. At some point, all engines require these components to be replaced.

Turbochargers, on the other hand, place a significant amount of additional stress on the ignition components due to the high cylinder pressures.

On naturally aspirated engines, spark plugs typically last 80,000 miles or more, while ignition coils can last double that. However, these components on the 2.7L twin turbo EcoBoost engine are unlikely to last that long. Typically, issues arise as a result of normal wear and tear, but premature failures do occur.

In any case, the Ford 2.7 EcoBoost’s spark plugs should be replaced every 40,000 to 60,000 miles. Ignition coils will almost certainly last twice as long. If you begin tuning or modding the 2.7L twin turbo engine, the life of these components can be significantly reduced. Our modified twin turbo engines consume spark plugs every 10,000 miles.

2.7 EB Spark Plug & Ignition Coil Symptoms

Several symptoms of a faulty spark plug and/or ignition coil on the Ford 2.7L include the following:

  • Misfires
  • Rough idle
  • Stuttering/hesitation
  • Power loss
  • Check engine light (misfire codes)

When spark plugs and ignition coils fail, they exhibit similar symptoms. As they deteriorate, they are unable to ignite the air/fuel mixture properly for a complete burn. This results in misfires, which contribute to a number of the other 2.7 EcoBoost symptoms listed above. If one of the six spark plugs becomes faulty, we typically recommend replacing all six at the same time.

This is especially true if it has been some time since they were replaced; chances are the remaining spark plugs are nearing the end of their useful life as well. The same can be said for the ignition coils for the 2.7L V6 engine.

Ford 2.7 V6 Plugs & Coils Replacement

Due to the similar symptoms of the two problems, it can be difficult to determine whether the plugs or coils are to blame. This is an excellent way to determine. Examine the 2.7 EcoBoost’s fault codes to determine which cylinder is misfiring. Remove the ignition coil from the misfiring cylinder(s) and replace it with one from a working cylinder.

Drive around for a while longer and re-read the fault codes. If the misfires continued with the replacement cylinders, ignition coils are likely to be to blame. Otherwise, it’s most likely the spark plugs, which you can confirm using the same strategy.

Fortunately, the 2.7 EcoBoost’s spark plugs and ignition coils are extremely simple and inexpensive to replace. Even inexperienced do-it-yourselfers can complete the job in an hour or two. Spark plugs typically cost between $40 and $100, while ignition coils can cost between $200 and $300.

Ford 2.7 EcoBoost Reliability

Ford 2.7 EcoBoost Reliability

Is Ford’s 2.7-liter EcoBoost engine dependable? Yes. We believe the 2.7 V6 EcoBoost earns an above-average reliability rating. The engine, particularly the 2nd generation and 2018+ engines, does not suffer from a great deal of common issues.

Ford was quick to address the oil pan leakage issue. Additionally, they added port injection to the second-generation 2.7 EcoBoost to aid in the prevention of carbon build-up. While we do not consider ignition parts to be a common issue, it does highlight the fact that twin turbo engines can be more maintenance intensive.

How reliable each 2.7 V6 engine is is frequently a matter of luck of the draw. Regrettably, we have no control over that aspect. However, 2.7 EcoBoost owners do have some control over a number of variables.

Maintain the engine properly, address issues as they arise, and allow the engine to warm up before putting it through its paces. Otherwise, it comes down to the fundamentals, such as using high-quality oil and changing it on a regular basis.

Maintain your 2.7L EcoBoost properly, and it should reward you with a fun, reliable life. While the twin turbo, direct injection design does require additional maintenance, we believe it is well worth it.

Ford 2.7 EcoBoost engines deliver an excellent balance of power, torque, fuel efficiency, towing capacity, and fun. Overall, it’s a very reliable engine. Most well-maintained 2.7L V6 engines should have no difficulty reaching 200,000 miles. That is an impressive amount of longevity.

Ford 2.7L V6 Common Problems Summary

As with the Ford 3.5 EcoBoost engine, we’re quite taken aback by the smaller 2.7 EcoBoost engine. The twin turbo 3.5L engine, we believe, outperforms the 5.0 Coyote in almost every way. While the 2.7 EcoBoost is not quite as powerful, it is not far behind. It’s also an excellent option because the 2.7L engine is slightly less expensive than the 3.5 V6 and 5.0 V8 engines.

Carbon deposits and oil pan leaks are common issues with early 1st generation 2.7 EcoBoost engines. Ford quickly addressed both issues by updating the oil pan and adding port injection to subsequent engines. Otherwise, we couldn’t think of anything else to write about. While these are not true statements, they do highlight an important fact: turbo engines can be a little more maintenance intensive.

Nonetheless, if the Ford 2.7 engine is properly maintained, it is an excellent, reliable engine. There is a chance that some minor issues will arise over the course of ownership, particularly as the vehicles age and accumulate mileage. That is true of any engine, however.

What are your thoughts on the 2.7 EcoBoost? Are you considering purchasing one?

Up Next: Ford 1.6 EcoBoost Engine Problems: The 4 Most Common Problems

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