really awful
Crashes / Fires:
3 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
43,357 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 5 of 6)

« Read the previous 20 complaints

problem #26

Aug 172013

F-150 6-cyl

  • 46,000 miles


On I-20 East headed to augusta, ga from Alabama I pulled into the left lane to pass and the engine starts sputtering, skipping and lost almost all power. It happened 3 times yesterday. It was in a light rain and since there was light traffic I was able to slow down and get the engine to recover each time. This could be a real danger in heavy traffic. I tested it again this morning (08/18) and if you try to accelerate quickly it just about shuts down until you let off.

- North Augusta, SC, USA

problem #25

Aug 102013

F-150 6-cyl

  • 41,000 miles
Went on a 350 mile trip, I was at a stop light and when I went to accelerate the truck lost all power. I have one of the ecoboost engines. The engine did fix itself and I continued with no other problem, this is the first time I experienced this problem. 2011 Ford F150 king ranch.

- Charlotte Hall, MD, USA

problem #24

Mar 152013


  • 35,000 miles
When getting on the highway with pedal all the way down start to get shutter at 4100 RPM through 2nd gear and then when it is in 3rd gear at the same RPM it will shutter even worse and then sometimes the check engine light will come on and start blinking for up to a min and then the truck will not move at all.

- Hamilton, OH, USA

problem #23

Jul 192013

F-150 6-cyl

  • 48,633 miles


This truck has a very bad habit of loosing power and throttle response after driving for extended periods in heavy rain/high humidity. This problem occurred the second day I owned this truck (original owner) and has happened several more times over the past 2 years. The most recent time it occurred I was merging onto the highway and the truck started to shake and lost all power, I ran out of room to merge and had to steer to the right of a vehicle that was in the break down lane...I had nowhere to go! my dealer has attempted the service bulletin to correct this condition but to no avail. 3.5L ecoboost is a hazard to operate under the above listed condition not only to myself but other people on the highway!

- Westbrook, ME, USA

problem #22

Aug 012013

F-150 6-cyl

  • 75,443 miles
When mild-accelerating to get to the highway speed limit of 75 my Ford F150 ecoboost started shaking at 55 mph and at 2,500 RPM my truck starts shaking and was unable to control. I had to exit the highway and drive at a lower speed I figured it was another engine misfire that I had replaced recently on 8/2/13. I then proceed to try again on the freeway and at 55pmh it again started to shake and rattle cause me to drive on the feeder road for the remainder of my trip to work.

- Corpus Christi, TX, USA

problem #21

Jan 152013

F-150 6-cyl

  • 18,000 miles
2011 Ford F150 ecoboost - purchased July 2011. When accelerating to pass traffic or merge into traffic. The vehicle shudders and shakes violently losing all power, the check engine light flashes the goes to solid. This was taken back to Ford dealership mechanics in Florida and Kansas 3 times now with no fix action in place. During a road trip in July 2013, (after a trip to Ford) we couldn't use the cruise control due to traveling over hills would cause the vehicle to lose power constantly to the point where some hills were almost impossible to drive over, vehicles behind me were honking and complaining as it barely made it up hills.

- Wichita , KS, USA

problem #20

Apr 122011

F-150 6-cyl

  • 3,000 miles


The contact owns a 2011 Ford F-150. The contact stated whenever it is wet or damp weather the vehicles speed and acceleration decreased. The failure occurred at least eight times. The dealer did not give a reason for the failure, but stated that this was a known issue. The vehicle was not repaired. The failure mileage was 3,000. The current mileage was 71,000.

- Centre, AL, USA

problem #19

Jun 292013

F-150 6-cyl

  • 13,500 miles
We were traveling on a two lane road. We were following a slow moving tractor trailer. We had been traveling for about 3 hours. It had rained earlier and was humid. I accelerated to pass and was partially around the truck when the engine of my truck started misfiring and lost power. Luckily, I was able to limp it along and get back into my lane before having a problem with oncoming traffic. The motor in my truck is the 3.5 liter ecoboost. I have seen reports of this happening to this motor, but this is the first time it happened so dramatically to mine. I don't recall having traveled for any distance in these conditions with this truck. The truck is scheduled to have this problem looked at. It was explained to me that there are different repairs depending on how the truck is equipped. This was a very dangerous event and I believe this should have been taken care of before the incident happened. I have read of a possible recall of the trucks with these motors to rectify the problem. It is evident to me that this needs to be done before someone isn't as lucky as we were.

- Randolph, NY, USA

problem #18

Jul 042013

F-150 6-cyl

  • 32,453 miles
While traveling to Florida with family on vacation just coming out of mountains of Tennessee went to pass a 18 wheeler hit gas was going 60 truck started shaking slowing down had traffic behind no cel light or any other warning light on let off gas three times before I could accelerate normal again then happened again in Florida on I 75 on ramp had to let off two times before could accelerate.

- Colfax , IN, USA

problem #17

Apr 102013

F-150 6-cyl

  • 38,252 miles
When I'm accelerating the engine stalls, I may be leaving a stop sign climbing over an overpass or passing another slower vehicle. Seems to happen more often about 40mph to 70mph.

- Grand Saline, TX, USA

problem #16

Jun 102013

F-150 6-cyl

  • 19,000 miles


Spring of 2012 acceleration failed when overtaking a slower vehicle. My speed was about 60 mph. This happened on more than one occasion. 06/10/13. Vehicle engine began missing and vibrating when accelerating at any speed. I was driving about 45 mph. Have sent the pickup to the dealer for inspection/repair.

- Lewisville, TX, USA

problem #15

Jun 072013

F-150 6-cyl

  • 20,000 miles
While attempting to accelerate back to highway speeds after slowing down for a car leaving the highway, my truck lost power and started to shutter. The engine light was flashing and I was unable to maintain highway speeds. I exited the highway and after about 2-3 minutes I was able to accelerate normally. Conditions were wet and the temperature was around 70F.

- Smithfield , NC, USA

problem #14

Oct 032012

F-150 8-cyl

  • 16,318 miles
Vehicle began shuddering heavy between 40mph and 50mph. Requiring me to depress the gas pedal heavy to avoid the shuddering, its almost impossible to drive my vehicle at 45 mph (which is the speed limit in most of the area I drive in). This occurrence is when 5th gear changing to 6th gear, which is typical between 45 mph. Not sure what damage this is doing to my vehicle, let alone the safety risk this may be causing. I have had the vehicle in the dealership at lease 6 times for this issue and with no results of the issue being resolved. Just the run around and false promises. 2011 F150 5.0 motor and 3.55 gear ratio.

- Miami, FL, USA

problem #13

Jan 092012


  • 5,500 miles
2011 Ford F 150 with eco boost. When I accelerate the vehicle stalls out, bogs down, looses power and shutters. I have taken in the shop several times and they could not fix it. I recently took it back in and hey changed the spark plugs which helped a little however still really rough. I am thinking of filing. Lawsuit against Ford. I have tied to trade out of the vehicle and I'm upside down because of bad publicity I'm being told. I thought I had. Lemon but I guess it's all the engines.

- Southlake, TX, USA

problem #12

May 192013

F-150 6-cyl

  • 85,500 miles
Vehicle shut off going up hill weather cold and damp took truck to dealer on 5/20/13 found nothing wrong. On 5/25/13 vehicle shut off 11 times while accelerating. Drove vehicle on mon May 27 shut off 9 times and we were nearly run over by semi on interstate. Engine light came on on Tuesday May 28 drove to dealer with vehicle shutting off over 10 times. Vehicle is a liability as well as a safety hazard for driver as well as other drivers.

- Watsontown, PA, USA

problem #11

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 #10

Jan 012011

F-150 6-cyl

  • 1,500 miles
Driving on new years day, I was traveling and needed to accelerate onto an expressway. As I pressed on the throttle pedal my Ford F150 2011 seemed to lose power for a second or two before regaining power again. This was the first time I can recall, but it happens each time I press the throttle all the way down for acceleration. I have learned that my F150 is not reliable enough to attempt to pull out unless traffic is completely cleared, or I have several car lengths of distance.

- Commerce Twp, MI, USA

problem #9

May 182012

F-150 6-cyl

  • 2,000 miles
Loss of power during acceleration with ecoboost engine. I have been complaining to the Ford dealerships about this since right after I bought the truck. Thank you for putting this problem in the media as I am now hopeful for a resolution. I called the Ford dealership this morning and they said they knew nothing about it and to contact Ford. Here we go again with no one in Ford service departments wanting to acknowledge and resolve the problem.......

- Angleton, TX, USA

problem #8

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 #7

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

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