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really awful
Crashes / Fires:
3 / 1
Injuries / Deaths:
0 / 0
Average Mileage:
42,227 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2011 Ford F-150 engine problems

engine problem

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2011 Ford F-150 Owner Comments (Page 15 of 17)

« Read the previous 20 complaints

problem #50

Jun 112011


  • 2,100 miles


The first time I was accelerating in an on ramp to highway speeds when the engine started missing to the point I had to abort entering the highway and pull into the emergency lane to avoid the on coming traffic. I took it to the dealer and was told that nothing could be found wrong with the engine. This has happened numerous times and I keep getting told that there are no reports of this happening on other eco boost engines. My solution is to increase the distance to get up to speed with the approaching traffic which is not always a safe practice.

- Flower Mound, TX, USA

problem #49

May 222013


  • 51,800 miles
Accelerating onto interstate from on ramp, sudden loss of power, vehicle shuddered, lost power and speed. Vehicles around me on interstate had to swerve to avoid hitting truck. Truck gradually regained speed over next 1/4 to 1/2 mile. Approximately 24 hours and 400 miles later the check engine light came on.

- Charleston, SC, USA

problem #48

Oct 102012

F-150 6-cyl

  • 7,000 miles
The vehicle lost acceleration in a major highway and started to smoke. My wife and I were almost killed when we tried to move off the road by a tractor trailer. There was no way of controlling the vehicle with no acceleration and major vibration of the truck. I notice that many others are having problems with the ecoboost F150 engines as well.

- Lumberton, NJ, USA

problem #47

Apr 122012

F-150 6-cyl

  • 1,200 miles


Ford ecoboost. Vehicle has few issues. First there is unexpected hesitation when pulling out in traffic. You are without power and subject to being run over. There are times when at highway speeds the engine goes limp when accelerating leaving you in traffic subject to being run over. Ford has replaced the cac and this has not happened since. When at speed and you accelerate a small amount, the engine will misfire and run rough. The lack of throttle response leaves you vulnerable when passing. Been at the dealer 5 times for these problems.

- Dawsonville, GA, USA

problem #46

Dec 152011

F-150 6-cyl

  • 900 miles
3.5 liter ecoboost motors sputtered under acceleration on hill and has done this since bought.

- Fort Worth, TX, USA

problem #45

May 312012


  • 3,000 miles
Vehicle acts as if it wants to stall during rainy conditions upon high acceleration, only during wet conditions does the ecoboost not accelerate when needed. Has caused 3 serious situations where power was needed and expected but truck sputtered and would not accelerate. This has been dangerous and dealer has no fix. I am unhappy with this engine. There are no lights that come on to warn you of the condition, and you cannot tell there is a problem when cruising at highway speeds, only when you go to pass or need power.

- Spanish Fort, AL, USA

problem #44

May 242013


  • 13,000 miles


The contact owns a 2011 Ford F-150. The contact stated that while at a stop and attempting to accelerate, the vehicle stalled without warning. The vehicle was not taken to a dealer for a diagnosis. The manufacturer was not made aware of the failure. The vehicle was not repaired. The approximate failure and current mileage was 13,000.

- Woodstock, GA, USA

problem #43

Nov 152012

F-150 6-cyl

  • 18,000 miles
Vehicle loses power and misses at around 1500-2200 RPM's.

- Parkville, MO, USA

problem #42

Jul 202012

F-150 6-cyl

  • 25,000 miles
Went to pass a car, lost power, had to drop back.

- South Lyon, MI, USA

problem #41

May 012013

F-150 6-cyl

  • 37,000 miles
An example of what happens is this: Traveling along at 45mph, and pull out to overtake a slower vehicle, you accelerate aggressively. Upon doing this, the truck seems to stumble like it's hunting for the appropriate gear (@ about 45- 50mph). Also, it feels like an engine mis-fire. It's a disconcerting feeling that the truck does not accelerate as it should when you need it the most.

- Hershey, PA, USA

problem #40

Nov 212011


  • 350 miles


At about 30 mph while accelerating the engine will cut out and lose power. It will chug, cutting in and out for a few seconds before picking up. This also happens randomly when going up an incline. We have been put in a few dangerous situations by this before but thankfully nothing serious has happened. Took it to Ford dealer where we bought it and they told us nothing was wrong. We took it back 2 more times and still was told there is nothing wrong. I called today to get the truck back in and they say there is no record of us taking the truck in the previous 3 times.

- Gillette, WY, USA

problem #39

Mar 162013

F-150 6-cyl

  • 48,000 miles
I own a 2011 F150 3.5L turbo ecoboost truck. It has cause me nothing but grief! violent hesitation/shaking on highway when passing. Lose of power with engine light coming on left me on the road twice. Finally engine block exploded with a rod shooting out of engine. Oil spayed all over engine creating thick black smoke and poor visibility. Pulled over had to get out of the truck because smoke was inside. Countless Ford attempts to fix the issue and nothing worked. Eventually the whole engine was replaced. I just received my truck back and have lost total faith in this product. There is something wrong with this engine! I have all documentation for this.

- Edmonton, Alberta, Canada, CA, USA

problem #38

Feb 072012

F-150 6-cyl

  • miles
I was reading on line about the problem with the Ford F-150 eco boost engine and realize that this has happen to me several times and scare the [xxx] out of me. Not realizing that there was a problem with the truck. As a matter of fact when I try to use the passing gear to pass the truck fell on it face. I would like this to go on a report of engines losing power during hard acceleration such as when passing. Information redacted pursuant to the Freedom Of Information Act (FOIA), 5 U.S.C. 552(B)(6).

- Cleveland, OH, USA

problem #37

Dec 102012

F-150 6-cyl

  • 56,000 miles
Dates and mileage are close but aprox. This is going on now and Ford has been unable to fix the problem after being in for repair multiple times. This is a constant problem with truck now. The first occurrence I was taking off from a light and went to accelerate and truck started hesitating and check engine light came on. Ford said it was intercooler and fixed that but drove truck from dealership and did not get 1/4mile down road before it hesitated again. Then Ford said it was coil pack and seemed to fix it but then it started right back up within a month.

- Rhoadesville, VA, USA

problem #36

May 022013

F-150 6-cyl

  • 17,000 miles
Traveling on I 20 during heavy rain, got off interstate to refuel and after reentering interstate accelerated to get back to highway speed and truck stalled went to shaking real bad and engine light came on. Would not accelerate just shook real bad and I pulled over turned it off for a few minutes and restarted and continued on. No more issues once the rain stopped.

- Vicksburg, MS, USA

problem #35

Feb 202013

F-150 6-cyl

  • 60,000 miles
On I-70 near St. Louis, I was in the inside lane and when I press the gas pedal to pass with my F-150 ecoboost, the truck lost power and had almost completely shut itself off and the check engine light came on. I had to shut it down and let it set for almost 20 minutes before it would restart correctly and check engine light would go off. By luck I had enough room to move over on the median of the highway.

- Eldon, MO, USA

problem #34

May 022013

F-150 6-cyl

  • 11,000 miles
I recently saw where the NHTSA was investigating performance issues (bogging down, hesitation) of Ford ecoboost 3.5L V6. I have had this problem along with severe downshifting when decelerating causing skidding and loss of control in wet or icy conditions. I reported this problem to tony frederick vp Ford customer service who sent a factory rep to look at this and other issues. Was told vehicle was functioning normally. The hesitation when accelerating for me occurs regularly. I do not believe its isolated to wet or humid conditions.

- Peoria, IL, USA

problem #33

Jan 082013

F-150 6-cyl

  • 500 miles
Slowed down to make a turn, tried to accelerate and engine hesitated for five seconds. Tried to merge into trafic and engine hesitated. This has happened many times, had to pull over on shoulder till engine picked up speed.

- Chippewa Falls, WI, USA

problem #32

Jun 282012

F-150 6-cyl

  • 15,000 miles
After 4 hours of steady highway driving upon attempting to pass a vehicle the truck failed to downshift, lost power ( requiring me to abort maneuver) and began bucking... there was no cel. Took the car to the dealer and they inspected the truck found no codes and said no problem found. They said they reloaded the programming for the transmission. This vehicle has experienced this problem numerous times since the first occurrence. Always happens when accelerating and creates dangerous loss of power at critical driving periods.

- Columbia, MD, USA

problem #31

Jan 012012


  • 1,000 miles
The vehicle just doesn't accelerate without hesitating.

- Minot, ND, USA

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