2017 ford expedition ecoboost problems

2017 ford expedition ecoboost problems DEFAULT

Whether you want to purchase a new car or are experiencing issues with your current vehicle, it's usually a good idea to research some of the problems that people experience with a vehicle. When it comes to the Ford Expedition, there have been a number of cases of drivers encountering problems that span model years. Learn more about some of the problems that those who own a Ford Expedition experience and find a comparison of the different Expedition models, problems, and costs through the years.

People's Experiences With the Ford Expedition

The Ford Expedition, specifically the older models, is notorious for giving people a lot of issues. In fact, based on customer reviews, many people experience many of the same issues, regardless of the model or year.

For example, one person wrote on carcomplaints.com that their 2005 XLT was a waste of money and even had mechanics refuse to work on the truck. The review states that as soon as they would address one issue, several more seemed to pop up. Aside from apologizing to anyone who owns the same truck, the reviewer said that their mechanic was asking $4100 for a transmission rebuild when the truck is only worth $400 in perfect condition.

One review on ConsumerAffairs suggests that Ford has knowingly ignored issues with the paint, a problem often found on Ford Expedition models that come with aluminum body panels. According to the reviewer, these vehicles can have peeling or bubbling paint, often paired with weird white dust. They reference a technical service bulletin (TSB 19-2026) saying that drivers should replace the entire affected panel, but say that their local dealership refused to replace the affected tailgate because the vehicle was a little over three years old.

Carcomplaints.com features another review where a person states that they purchased a brand new 2015 Ford Expedition, and after just 75,000 miles they began experiencing an intense shaking of the entire vehicle any time that they drove anywhere between 40 and 60 miles per hour. The individual had their Expedition in the shop for an entire week, an inconclusive trip that ultimately cost them over $2000. After an entire week of guessing, the mechanic discovered that the car needed a brand new transmission, a fix that costs roughly $6200.

Not all the reviews are completely bad, however. One reviewer on ConsumerAffairs notes that they loved the comfort, ride, power, and size of their 2000 Expedition when it was still running. Though the reviewer mentions some positives, the review then goes on to say that they have experienced a number of issues with their vehicle over the five to 10-year span that they owned it. They blame bad engineering for the issues and go on to say that many of the problems they have experienced are the same ones that others have encountered with the same vehicle.

Another ConsumerAffairs review mentions that they hear an extremely loud humming noise any time that they drive their Ford Expedition. They say that it's so bad they are unable to hear other passengers in the car or even listen to the radio. The issue has apparently continued to worsen to the point that the reviewer says that the car is almost too annoying to use.

Ford Expedition Model Year Comparison

Though there are several problems that commonly occur with Ford Expeditions, the worst category seems to be issues that involve the engine, according to carcomplaints.com. Apparently, the most reported issue involves the spark plugs blowing out of the head in the 2003 model year. Though the 2003 model has the most complaints, the 2004 Ford Expedition tends to require more expensive repairs and has more issues that occur at lower mileage. Ford Problems reports these common Ford Expedition issues and some of the details that tend to surround them:

  • Engine shutting off after the fail-safe engine light appears in 2006 Ford Expeditions
    • Average mileage when problem occurs: 82,000
    • The average cost to fix the issue: $700
  • Bubbling paint in 2005 Ford Expeditions
    • Average mileage when problem occurs: 54,000
    • The average cost to fix the issue: $4200
  • Transmission failure in 2004 Ford Expeditions
    • Average mileage when problem occurs: 76,000
    • The average cost to fix the issue: $2700

Worst Complaints About the Ford Expedition

According to Ford Problems, you should probably avoid the second generation of Ford Expeditions that were manufactured between 2003 and 2006 because of the number of issues that they have and the average cost to repair them. Here's a closer look at the Ford Expedition models over the years:

  • First generation (1997-2002)
    • 4/5 Reliability
    • 561 Complaints
  • Second generation (2003-2006)
    • 2/5 Reliability
    • 665 Complaints
  • Third generation (2007-2017)
    • 4/5 Reliability
    • 281 Complaints
  • Fourth generation (2018-2019)
    • 5/5 Reliability
    • 0 Complaints

Ford Expedition Repairs by Public Area

True Delta reports that there are specific areas of the Ford Expedition, regardless of the model year, that tend to experience more problems. Here's a breakdown of the Expedition's most common issues:

  • Other: 4%
  • Trim and body: 6%
  • Brakes: 6%
  • Transmission: 12%
  • Suspension: 12%
  • Air conditioning and electrical: 28%
  • Engine: 31%

Ford Expedition Repair Cost Distribution

True Delta has also gathered data about the average cost for Ford Expedition repairs. According to them, repairs tend to average anywhere between $100 and $499. Here's a closer look at the average distribution of costs for Ford Expedition repairs:

  • Less than $100: 28%
  • $100 to $499: 38%
  • $500 to $999: 21%
  • $1000 to $2499: 10%
  • $2500 or more: 3%

Ford Expedition Problems by Year

Additional data from True Delta breaks down the average number of problems that Ford Expedition owners deal with based on the vehicle's model year:

  • 2018 to present: 0%
  • 2015 to 2017: 1%
  • 2007 to 2014: 30%
  • 2003 to 2006: 51%
  • 1999 to 2002: 17%
  • 1996 to 1998: 1%

If you already own a Ford Expedition or are in the market to purchase one, it's wise to look into what others have said about their experience owning and driving the vehicle. More specifically, it can be helpful to learn about the problems that the Ford Expedition commonly has.








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2017 3.5l ecoboost Expedition, any known issues?

I have a 2017 el that was also a rental prior to my purchase,with 56k on it. I've only put 3,500 miles on it since August. The only issue I've had is that when park it with the front end higher than the rear end(parking spot with a decent grade), then water from rain overwhelms the 2 rear sunroof drains and water has poured into the vehicle from the 2 central roof air vents..... I'm gonna run some trimmer line through the drain lines and that may solve the problem, but I cant imagine that they are clogged. If you don't have a sunroof, then this shouldn't be an issue. For more info on mine and similar leaks look at the "2017 Water Leaks" thread.

I average 13.8 right now, but most of my driving is around town while carrying my wife and 6 kids...so running with more weight than some. My wife took a 1,000mile trip Kentucky and back and got around 17 carrying a full load of passengers and the cargo area full as well

For perspective, this truck replaced my 2001 Chevy Suburban LT with 195,000 miles....had a sunroof and never had a single leak. I guess chevy is better at designing sunroofs/drains.....still miss my Suburban:(

Sent from my SM-G955U using Tapatalk


Sours: https://www.expeditionforum.com/threads/2017-3-5l-ecoboost-expedition-any-known-issues.37625/page-2
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The 3.5L EcoBoost offers drivers a 3.5-liter V6 gasoline direct-injected as well as turbocharged engine. Arriving on the automotive scene back in 2007, it used the name TwinForce. The general concept behind this unit was to provide a solid alternative to a large-displacement V8 engine. The new turbocharged 3.5L V6 engine provides equal torque and power, to the 6.0L V8 engine. It is also propelled with less fuel consumption and emissions of dangerous substances to air. 

Auto Repairs Are EXPENSIVE

Is the Ford 3.5 EcoBoost A Good Engine?

Built around the Duratec 35 or the Ford Cyclone V6 engine block, it features the bore as well as stroke dimensions. Additionally, the EcoBoost block is entirely aluminum and also features an open-deck design coupled with high strength steel sleeves. The 3.5L EcoBoost has forged steel I-beam connecting rods accompanied by a forged steel crankshaft aligned with six-bolt bearing caps.  

The cylinder heads for the 3.5L EcoBoost are aluminum alongside four valves with each cylinder. The engine also has Twin Independent Variable Camshaft Timing with an intake camshaft from the driver's side that has an additional lobe driving. You can also find a high-pressure fuel pump from the direct fuel injection system. 

The 2017 Second Generation 3.5 EcoBoost Engine

Back in 20177, Ford introduced a second generation of the 3.5L EcoBoost engine, that offered more power and was also available on the 2018 Navigator, Ford’s luxury brand- as well as the 2017 F-150 and the 2018 Expedition. With this upgraded engine came a number of chances, with the most notable of them being the addition of multi-port fuel injection coupled with new turbochargers.  

The new Ne 3.5 EcoBoost has a two-primary chain system alongside a cam chain drive sprocket on the crankshaft- that offers a double gear arrangement. Now only are the chains new, but more durable than their earlier counterparts. This makes them less prone to stretching.  

Common Issues with the Ford 3.5L EcoBoost Engine 

With automotive ingenuity and technology, comes issues; such is true for the 3.5L EcoBoost. With approximately 400,000 3.5L EcoBoost engines on highways and byways, the engines have proven to be a solid power component. But many of the engines are out of warranty and headed to a shop near you.  Here are some common issues to look out for- with the 3.5L EcoBoost: 

Timing Chain Wear

Due to the 3.5L EcoBoost being turbocharged, the oil in the engine endures lots of stress. So should the driver push the engine past the recommended oil change interval, there will be visible abuse shown in the timing chain. Additionally, oil that has not been replaced and/or changed can result in damage with the guides, chain and tensioner. Once you have a chain that is stretched and worn, the PCM will detect such and will set a code of P0016 for crankshaft/camshaft correlation. 

Transmission Shifting and Related Issues 

Within the past updates to the 3.5 L engine, there have been various changes and calibrations and operation software for the 2011 3.5 engine models- in an effort to address problems with the ignition, vacuum and transmission shifting. Engine owners may experience stalling, loss of power or something else dangerous. 

Problems with Ignition 

If your 3.5L EcoBoost has a misfire code or codes of P0300-0306, you may opt to pull the plugs and coil boots. Then you can begin to look for carbon tracks on the insulator of the plugs. 

Issues with Induction Cleaners 

Although the 3.5L has not had many noted problems with carbon build-up on the intake valves. Some owners buy and use induction cleaners and inject them into the intake. Some of these cleaners can damage the turbochargers’ seals, turbines and bearings, seals and turbines. You may just want to stick to using a high-quality fuel.  


Ford 3.5L EcoBoost Engine Complaints – What Do Owners Say? 

Although the Ford 3.5L EcoBoost engine is a highly efficient machine, it manages to give some engine owners problems. Check out some complaints logged against the popular Ford engine. 

Owner Number One- F-150

“I have 22,500 miles on this 2017 Ford F150 3.5 EcoBoost. It has started throwing a code of po4db crankcase disconnect. I have been researching and there are a lot of Ford products having the same issue. This code made engine light come on and stay on. It appears it's in the computer system, is my understanding. Sitting still, driving it doesn't matter engine light stays on.” 

Owner Number Two- F-150

“[This truck will] rattle on start up. This truck sat for a couple of hours to overnight and the engine sounded like a diesel for between 15 and 30 seconds. This seems to be a common issue with the truck engine the 3.5L EcoBoost. A Google search shows this is a very common issue and requires the engine to be torn down. The common problem seems to be the timing chain and timing chain tensioners. Ford Corp was absolutely worthless in supporting this repair. The dealer was absolutely wonderful. My truck was taken to the dealer on May 13 and I might get it August 16 or 17. Parts were ordered on May 15 and estimated delivery was July 31. That's unsatisfactory! Ford did not have any parts as there are so many engines being repaired for this issue.”


Owner Number Three- F-150

“I bought 2017 F-150 platinum from Levittown Ford I own it less than 1 year and have now 15,000 miles on it. My problem first started around may of 2018 it was random happening off and on I was getting a grinding noise when I started the truck. [The grinding noise would only happen when] I stared [the truck] usually first thing in the morning or if it sat for more than 6 or more hours. The problem got worse as the summer progressed. So, I made my first appointment with Stevens Ford on 07/10/2018 after being told they had a back log of several weeks and this was the earliest appointment I could get. Well I picked up the car at night and the claim they did not hear the noise yet on the receipt it says due shop over load. So, I made an appointment with the dealership I bought it from and the earliest date I could get was 07/25/2018 and they were finally able to diagnose the problem being the timing chain and cams as per attached paper work. I was without my vehicle for almost one month and now after picking it up I still feel a slippage in the engine as I drive it. Now after doing extensive research I have found that the 3.5 6-cylinder EcoBoost engine has had this problem dating back to 2004 and have really never fixed the problem. It usually effects the engine after the 60,000 warranty expires and I have rarely seen this occur in a truck as new as mine. I am fighting with Ford on all avenues to get my truck bought back by them because I have lost all confidence in this product.” 


Owner Number Four- F-150 Limited 3.5L V6 EcoBoost

“I was driving down the highway on my way to work. [I] Hit about 1800rpm in 6th gear when my engine light started flashing, trick went into limp mode and starting shaking like crazy, as if i were off-roading. This proceeded to happen about 10+ on my 25 min drive [and] gradually [was] getting worse and worse. My truck cannot go over 80km/HR with this happening, nor can I rev the engine at all past 1800 rpm. Getting diagnostics done at Ford on Monday. The next morning engine light was steadily on with an engine code p0302 (cylinder 2 misfire). What’s scary was, this happened to my friends EcoBoost engine exactly. Problem=coolant leaked into cylinder chamber. It's a Ford problem [and] they know about[it]. It’s a design flaw. [My friend] had his entire engine rebuilt with a whole new long block installed. Don't let Ford trick you. They know what the problem is. It’s an EcoBoost design flaw.” 


Owner Number Five- F-150 FX4 3.5L Eco Boost

“I have had this problem a lot. [I] Go to get on the gas and the engine shutter and check engine light comes on. I have replaced all plugs and coil packs which helped a lot at first. Then the problem happened again. The check engine light goes off for a period of time but always comes back on. Took it to check what codes were coming up with the check engine light but it has to be on. Took my truck out on the road and got on the gas hard to make light come on. Once back to part store they hooked up CPU to the truck and the O2 sensor was throwing a code as well as the turbo wasn’t charging enough. I haven’t got the 2 things fixed yet but hoping they will fix the problem. The O2 can really cause misfires and shutters. It’s getting fixed soon so hopefully I can let you all know. If you want them to hook up the CPU but the check engine light is off [so, it will not] show anything. So, take your truck and get on the gas to force it on and then take it back.” 

Owner Number Six- F-150 Lariat 3.5L EcoBoost

“During a “hard” acceleration, the engine shudders, the check engine light starts to flash and the truck goes into a “limp mode” for about 30 to 40 seconds. By the way, this is the fourth time this problem has happened with my F150. The first time it happened I took it to the Ford dealer and they said the #1 cylinder misfired and it was due to the spark plugs. They changed all six spark plugs and they performed a software update to the system. At this point my F150 had 45,000 miles (approximately). A week later during a hard acceleration, the engine shuddered, the check engine light started to flash and the truck went into a limp mode. I took it back to the Ford dealer and this time they told me it was the MAF sensor. The first two visits cost me about $500. A week or two later, the same problem happened again, but I opted not to take back to the dealer. I had to learn to not accelerate so hard and to provide ample room when merging onto the highway. I love this truck, but I hate the engine.” 


How Much Does It Cost to Replace Turbos On 3.5 EcoBoost?

Generally, the cost for a Ford F-150 turbocharger assembly replacement can run you a little under $1000 But don’t forget about labor and parts. Depending on where you go, the labor will be about $500- while parts may run you about $650 to just under $700. Be sure to include taxes and fees into your repair costs too. 

How Do I Get More Horsepower Out of My 3.5 EcoBoost?

Here are the top five modifications that should be done to your 3.5 EcoBoost, according to the CJ Off-Road YouTube Channel

Modification Number One- Oil Separator 

Since you have a direct injection engine, the fuel injectors don’t spray oil into the intake valves. Then you are talking about carbon buildup that can create lots of issues. 

Modification Number Two- A Cat Back Exhaust 

You have to get rid of all of that air! 

Modification Number Three- A Cold Air Intake 

A good cold air intake will be a great replacement for a factory one, providing better flow. 

Modification Number Four-Upgrade your Intercooler 

With an upgraded intercooler, you’ll get better air flow as well as reduce intake temperatures. 

Modification Number Five-Flash Programmer 

The programmer will help you get more horsepower. 

Click here to learn more! 

Tired of your Ford 3.5L EcoBoost Engine Problems & Need to Sell Your Ford? 

If you are sick and tired of that Ford with the 3.5L EcoBoost engine and you are ready to get rid of it, just sell it to Cash Cars Buyer! We buy all makes and models, including cars with that ever-frustrating 3.5L engine! 

Just click here to get a FREE online offer on that problematic Ford now! Then, call to speak to one of our friendly agents, who are ready to help you get the most money for your car! 

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Can’t find the title to your Ford? Take satisfaction in the fact that be buy Fords with no titles, and we just may buy yours! in most cases, not having the title to your Ford with the blown engine, is not an issue. We just ask that you have your picture ID as well as your car registration. And soon, you can turn that frustrating Ford into fantastic cash! 

No need to call a junkyard, scrap yard or post an ad online. Sell that old non running Ford to Cash Cars Buyer! We make selling that Ford with the terrible 3.5L engine quick, fast and convenient! Your instant offer awaits!

Categories BlogSours: https://www.cashcarsbuyer.com/ford-3-5l-ecoboost-engine-problems/
Ford Expedition 3rd Gen 2007 to 2017 common problems, issues, defects and concerns

The 3 Most Common Ford 3.5 EcoBoost Engine Problems

Ford 3.5 EcoBoost engines came out in 2010 in the Lincoln MKS, MKT, Ford Flex and Taurus SHO. The 3.5 liter twin turbo V6 then made its way into many other Ford and Lincoln models in the following years. It’s a stout engine offering 355 to 647 horsepower and plenty of torque. Turbocharging and direct injection also help the 3.5 V6 remain fuel efficient and cleaner on emissions. Overall, the 3.5 EcoBoost is a great engine but no engine is perfect and that applies here. In this article, we discuss some common problems with the Ford 3.5 EcoBoost V6 as well as overall reliability.

Ford 3.5 EcoBoost Engine Problems

Ford 3.5 Twin Turbo V6 Background

Before diving into 3.5 EcoBoost problems it’s important to lay out a little background info. There are two different generations of the 3.5 EB, which we will discuss quickly below. It’s important to lay this out for a reason. Ford did a solid job with some updates in the 2nd gen 3.5 EcoBoost engine. The updates help support extra power and torque. They also address a few reliability concerns to make the 2nd gen Ford 3.5 twin turbo engine even more reliable.

1st Gen 3.5L EcoBoost

The above isn’t to say the 1st gen is a bad engine by any means. However, combining turbos, direct injection, and VVT was a new direction for Ford. There are always a few kinks to work out, and for the 3.5 V6 they were pretty minor. We’ll be diving into this in the upcoming discussion on common 3.5L EcoBoost engine problems.

Anyways, the 1st gen EcoBoost makes 355-380 depending on the specific vehicle. The smaller twin turbos are quick to spool and provide tons of low-end and mid-range torque. It makes the 3.5 EB a great engine for towing and fun around town without having to use all of the RPM’s. The 1st gen 3.5 EcoBoost is found in the following Ford and Lincoln models:

  • 2010-2019 Ford Flex
  • 2010-2016 Lincoln MKS
  • 2010-2019 Lincoln MKT
  • 2010-2019 Ford Taurus SHO
  • 2013-2019 Ford Explorer Sport & Platinum
  • 2011-2016 Ford F-150
  • 2015-2017 Ford Expedition
  • 2015-2017 Lincoln Navigator

2nd Gen 3.5 V6 EcoBoost

In 2017, Ford began rolling out the 2nd gen EcoBoost in some models. It sees a bump to 375-450 horsepower in most models. However, Ford went a step further with a 647hp variant for the legendary Ford GT. That engine, of course, receives some upgrades over the standard 3.5 EcoBoost to support the power.

Ford also introduced port-injection on the 2nd gen 3.5 V6 twin turbo engines. This helps prevent against carbon build-up, which we’ll be discussing in this article. Additionally, Ford re-designed the timing chain due to some reliability concerns with the previous design. Another thing we’ll be diving into. The 2nd gen engine is in the following models:

  • 2017-present Ford F-150
  • 2018-present Ford Expedition
  • 2017-present Ford F-150 Raptor
  • 2018-present Lincoln Navigator
  • 2017-present Ford GT

3 Common 3.5 EcoBoost Problems

With some of the background info out of the way let’s move onto the actual subject at hand. A few of the most common issues with the Ford 3.5 EcoBoost engine include:

  • Carbon Build-up
  • Timing Chain
  • Ignition System

As we sort of mentioned above, the top two problems mostly affect the 1st gen 3.5 EcoBoost engine. Ford did a great job at updating some of the weaker points with the 2nd gen engine. Again, the 3.5 EcoBoost really is a solid, reliable engine overall. Two of the “problems” we list above might not even be fair to call problems. Carbon build-up is simply a downside to using direct injection alone. The ignition system parts like spark plugs and ignition coils are also simply a downside to turbocharging.

That said, we’ll dive into these 3.5 EcoBoost problems in greater depth below. Let’s knock out a few quick notes before. Just because we’re classifying these problems as common does not necessarily mean they affect a large percent of 3.5 V6 engines. Rather, they’re a few of the most common issues when something goes wrong. Additionally, engines are prone to many other problems we’re not discussing – especially with age and mileage.

1) 3.5 EcoBoost Intake Valve Carbon Build-Up

Carbon build-up is primarily a concern on the 1st gen engines. The 1st gen 3.5 EcoBoost only uses direct injection (DI), which means fuel is sprayed directly into the cylinders. As such, carbon build-up on the intake valves occurs over time. All engines experience some degree of oil blow-by. This oil makes its way through the intake tract where it eventually cakes onto the intake valves. Port injection has the benefit of fuel washing over the intake ports and valves. That helps wipe off the oil deposits and prevent it from accumulating.

However, when you only have DI fueling there is nothing to help clean the ports and valves. Over time, carbon deposits build-up and restrict air-flow into the cylinders. It’s not a major issue that requires immediate attention. Some DI engines even go their whole lives without having any valve cleaning. However, carbon build-up can result in power loss and plenty of other drivability issues.

With the 2nd gen 3.5 EcoBoost, Ford reduced this issue by utilizing both direct and port injection. It’s the best of both worlds in many ways since DI has many benefits over PI. However, using PI has a few benefits of its own – especially helping prevent against carbon build-up.

Ford 3.5 TT V6 Carbon Build-Up Symptoms

Symptoms of excess carbon build-up on the 3.5 EcoBoost intake valves and ports include:

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

Most of these symptoms are a by-product of the first symptom at hand – misfires. The carbon deposits can cause un-even amounts of air to enter to cylinders. This throws off the air-fuel mix and may cause the 3.5 EB to misfire. That can in turn cause symptoms like fault codes, rough idle, and stuttering. Power loss is another common symptom of carbon build-up on the Ford 3.5L turbo engine. However, it’s often hard to detect since carbon build-up occurs over a long period of time. Chances are you won’t notice power loss that occurs slowly over a several year period.

3.5L EcoBoost Carbon Build-up “Fix”

Once the carbon deposits become excessive then you’ll want to consider walnut blasting the intake ports. The job requires a quality shop vac and walnut media shells. Otherwise, it’s mostly just the labor in accessing the intake ports. Shops often charge $400-600+ for this job, so it’s not exactly cheap.

Fortunately, it’s not an urgent item that needs to be done quickly and you may not even want to do it at all. Carbon deposits shouldn’t cause any serious longevity concerns for the 3.5 EcoBoost. We would still want to take care of the job, regardless. Expect walnut blasting to be good maintenance to complete every 70,000 to 100,000 miles.

2) Ford 3.5 EcoBoost Timing Chain Problems

Specific details on the Ford 3.5 timing chain problems are hard to come by. This issue is mostly reserved to the 1st gen engines. More specifically, it seems to primarily affect 3.5 EcoBoost engines from 2010-2014. Ford improved the part prior to re-designing it for the 2nd gen 3.5L twin turbo V6. Timing chain issues also appear to mostly affect the F-150 models more than any other. Though, it’s very possible that’s simply due to the fact the F-150 is the most popular model using the EcoBoost engine.

Anyways, the issue at hand involves stretching of the timing chain. Some problems also occur with the 3.5 EcoBoost timing chain guides, tensioner, and cam phasers. It’s a good idea to replace the entire timing chain assembly if an issue does pop up. Fortunately, Ford did issue a service bulletin for these problems. If you’re out of warranty and run into timing chain problems you may be able to work with Ford.

These problems are typically urgent and should be repaired as soon as possible. If timing chain completely fail it’s possible for additional damage to occur to the 3.5 EcoBoost engines. It’s a very rare occurrence, but it’s important to repair the timing chain in a timely manner if issues pop up.

Ford 3.5L Timing Chain Symptoms

A few symptoms of timing chain, guides, tensioner, and cam phaser problems on the 3.5 EcoBoost include:

  • Cold start rattle
  • DTC P0016
  • Check engine light
  • Drivability issues

Rattling on cold starts is one of the more common symptoms that may indicate something is going on with the timing chain. Plenty of other things can cause rattle, though. Also look for the 3.5 EcoBoost to throw the P0016 fault code which will also trigger a check engine light. Finally, once the timing chain stretches it can throw ignition timing off and cause drivability issues. This includes misfires, power loss, rough idle, etc.

3.5 Twin Turbo V6 Timing Chain Replacement

Replacing the timing chain and other components isn’t an easy or cheap job. It’s labor intensive and the part costs can add up. You may also consider replacing some other small items while in there. Expect timing chain replacement to add up into the thousand plus dollar ballpark.

However, many faulty 3.5 EcoBoost timing chains were likely replaced at some point. It’s a common problem on the EcoBoost, but not every engine runs into these issues. Some suspect it comes down to poor maintenance and oil change history or using 20w oils, which are too thin for the engine. Ford also issued bulletins so they’re well aware of the timing chain problems. Even if it’s not covered under warranty you may be able to work with Ford for discounts or alternative compensation.

3) Ford 3.5 V6 Spark Plug & Ignition Coil Issues

Well, this is mostly here because we’re out of other problems to talk about for the 3.5 EcoBoost. Calling spark plugs and ignition coils an “issue” likely isn’t fair. However, it’s part of the nature in owning a twin turbo, direct injected engine. Coming from the BMW world we’re very familiar with this. Turbos put a lot of stress on the ignition system in part due to the incredibly high cylinder pressures.

Spark plugs often last 70,000+ miles on naturally aspirated engines and ignition coils usually last about double that. However, with the 3.5 twin turbo EcoBoost engine the ignition components will likely wear down much faster. It’s often just standard wear and tear, but premature problems are possible. This is pretty simple stuff on any engine and the 3.5L V6 from Ford is no exception.

Ignition components can cause a plethora of symptoms and other drivability problems so don’t overlook simple spark plugs or coils. Stock 3.5 EcoBoost engines will likely require new spark plugs every 40,000 to 60,000 miles. Expect the ignition coils to last about twice as long. If you’re running a tune, mods, or driving the 3.5 EcoBoost hard then the lifespan of ignition parts can shorten drastically. Our modded twin turbo 335i with the N54 engine requires new spark plugs every 10,000 miles. Ignition coils make it to the 25,000 mile mark – if we’re lucky.

3.5 EB Spark Plug & Ignition Coil Symptoms

Symptoms of spark plug or ignition coils on their way out include:

  • Misfires
  • Rough idle
  • Stuttering
  • Check engine light (misfire codes)

Plugs and coils usually exhibit these same symptoms. We typically recommend replacing all 6 spark plugs or ignition coils at the same time; especially if it’s been a while since they were changed. If you’re experiencing misfires here’s an easy way to see if a spark plug or coil is to blame. Check the fault codes to determine which cylinder(s) is misfiring. Pull the ignition coil from that cylinder and swap it with a cylinder that is NOT misfiring. If the misfire follows to the new cylinder then you’ve located your issue.

If it does not follow you can try the same with the 3.5 EcoBoost spark plugs. You may also just consider replacing the spark plugs anyways. It’s a cheap and easy repair.

Ford 3.5L Plugs & Coils Replacement

Again, the above method is a good way to determine where the issue is originating. Often it’s the spark plugs to blame since their life is a lot shorter than ignition coils. Fortunately, a set of 6 Ford 3.5 spark plugs usually comes in around $40-100 depending on where you source the parts. It’s an easy job that nearly anyone can accomplish in the driveway in less than an hour or two.

A set of ignition coils is a bit pricier at $200-300. However, it’s an even easier job than the spark plugs. Knock this out on your own or if you prefer a repair shop labor should come in under $100.

Ford 3.5 EcoBoost Reliability

Is the Ford 3.5 EcoBoost engine reliable? Yes. We believe the Ford 3.5 twin turbo engine receives above average remarks for reliability. There aren’t too many common issues that pop up on these engines. Additionally, Ford did a great job at addressing some of the problem areas with the 2nd gen 3.5 EcoBoost.

Of course, how reliable each 3.5 V6 engine is comes down to the luck of the draw in some cases. It’s one of the factors we don’t have control over. However, you can control how well you maintain the twin turbo EcoBoost engine. Change the oil on time, use quality oils, and fix problems in a timely manner if they pop up.

Take care of the 3.5 EcoBoost and it will likely reward you with a great, reliable experience. Turbo engines do add a bit of extra maintenance, but we think it’s rewarding in the end. Ford EcoBoost engines offer excellent power, torque, fuel efficiency, and towing capability. Most 3.5L V6 EcoBoost engines shouldn’t have any major issues making it to 200,000 miles or beyond. Not too bad for longevity.

3.5 EcoBoost Common Problems Summary

Not to disrespect the Ford 5.0 Coyote engine, but we believe the 3.5 EcoBoost is the clear choice if you have the option. The Ford 3.5 EB offers such a great balance of power, torque, towing, efficiency, etc. Use of twin turbos also allows for tons of tuning potential for those who want even more out of their engines. We really like the 3.5 EcoBoost, but no engine is perfect.

Earlier gen 1 engines run into some problems with timing chain failure and carbon build-up. Timing chain issues likely aren’t as common as some may lead you to believe, but it’s something potential owners should be aware of. Direct injection also naturally leads to carbon deposits on the intake valves that can cause drivability issues. Ford did a great job at addressing these problems once they realized the issues.

Otherwise, it’s important to keep in mind that turbo engines can be a little more demanding on maintenance. Spark plugs and ignition coils take a lot of abuse due to the turbo boost pressures. Turbo engines like the Ford 3.5 EcoBoost also have more parts to potentially fail. Nonetheless, turbo technology has come a long way in the past decades. Maintain the Ford EcoBoost engine well and it will likely reward you with a reliable, fun experience.

What’s your experience with the 3.5 EcoBoost? Drop a comment and let us know!

Or check out our post on the 3.5 EB vs 5.0 Coyote


Filed Under: 3.5 EcoBoost, Ford

Sours: https://tuningpro.co/the-3-most-common-ford-3-5-ecoboost-engine-problems/

Expedition problems ford 2017 ecoboost

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