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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 13 of 17)

« Read the previous 20 complaints

problem #90

Jul 022013

F-150 6-cyl

  • 65,850 miles


As described in NHTSA action number PE13018- hard acceleration and the engine misfired while trying to pass a vehicle on a highway.

- Fair Oaks Ranch, TX, USA

problem #89

Oct 262012

F-150 6-cyl

  • 28,000 miles
The first problem was while driving on the interstate at around 70mph it felt like I was rear ended and pretty hard. I looked around and there were no cars nearby. In about 2 minutes it did it again and again the started to be intermittent. I took it to the shop the replaced coil pack and plugs and sent me on my way. I did not make it 2 miles down the road when the engine started to shudder. Took truck back they kept it for weeks then said it was fixed. They had installed the shield per the tsb and again sent me on my way. Within 1 mile it did it again and I waited to take it back as I needed my truck for work and they were giving me tiny SUV loaner cars. This time they replaced intercooler after weeks and weeks of it sitting there. This happened approx. 12 times. During this time I sent letters about my concerns to every person on the board of directors at Ford with no response. The customer service manager for Ford not only avoided my calls and would not reply to me then I tried to escalate above her and reached a very arrogant jerk that blew me off. Once finally getting a reply from [xxx] I got the reply I have expected. The corporate blow off! Ford does not let you get past csm. This has been going on for over 7 months. I had enough so decided to try to sell this death trap and dealerships were low balling me do to the known issues. When leaving a dealership and trying to cross a rural hwy the truck lost power and I was nervously slamming the gas pedal to the floor and nothing happened. I had a dump truck coming at me blowing its air horns. The truck started to go but barely limping. This has now happened 3 more times and Ford denied this has happened to other trucks and that they knew of the problem. They now will not even work on the problem period I was told they are not allowed to try to repair these trucks at all. I have a very dangerous truck. Information redacted pursuant to the Freedom Of Information Act (FOIA), 5 U.S.C. 552(B)(6).

- Alpharetta, GA, USA

problem #88

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 #87

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 #86

Jul 042013

F-150 6-cyl

  • 23,000 miles
Traveling on 4 lane highway during period of train, accelerated to pass vehicles, my truck eco-boost motor acceleration stagnated and vehicle began to shutter, was unable to pass, decelerated and stagnation stopped. Incident occurred when ever I tried to accelerated during active rain during a 9 hour interstate trip.

- Spring Lake, ND, USA

problem #85

Jul 042013


  • 20,000 miles
The contact owns a 2011 Ford F-150. The contact stated while he attempted to merge into highway traffic at 65 mph the vehicle hesitated and failed to accelerate without warning. The contact was able to avoid two near crashes and drive safely onto the emergency lane. The loss of power failure was also previously experienced while driving 50 mph and the wrench light illuminated. The vehicle was towed to the dealer for diagnostic testing. The manufacturer was not made aware of the failure. The VIN was not available. The vehicle was not repaired. The approximate failure and current mileage was 20,000.

- Roanoke , VA, USA

problem #84

Jul 042013


  • 43,000 miles


While merging into traffic on the expressway today in miami, at about 35 mph, I had to accelerate to get out of the merging lane, at which time (for the third time since I bought the truck in 2011) the truck lost all power to the engine (a 3.5L ecoboost) and began to sputter, shake, and decelerate. Luckily for myself and the other drivers on the road I did leave a sufficient gap between myself and the car to my rear to give that vehicle time to react to what equates to a vehicle pulling out in front of him/her and gently pressing the brakes without the brake lights engaging. My truck hovered between 25 and 30 mph for about 30 seconds with it doing the sputtering and slowing thing each time I attempted to accelerate during that time period. After pretty much coasting for 30 or so seconds, the truck sprang back to life and drove as advertised. From what I've read, this is not an isolated incident and I (as well as others) believe Ford should be held accountable for this defect. I'm not looking for a new truck, I'd just like the problem fixed. Even though no deaths or injuries have been reported due to this "yet", you can see the danger of having your engine loose power when you need it the most. Unfortunately for their customers, all Ford seems to be concerned with is the loss of a buck......not the loss of a life!!! [xxx] information redacted pursuant to the Freedom Of Information Act (FOIA), 5 U.S.C. 552(B)(6).

- Sunrise, FL, USA

problem #83

Jul 022012

F-150 6-cyl

  • 44,520 miles
I was traveling in the righthand lane of the East bound side of I24 around manchester, tn. My speed was approximately 65-70 mph. I suddenly came up upon slower traffic in the same lane and signaled to pass the slower traffic. As I looked in my mirrors for traffic behind me I noticed another vehicle closing on me in a hurry. I depressed the accelerator to gain speed and make the pass. The vehicle lurched and the motor suddenly shut down and wouldn't accelerate in the middle of my pass. The vehicle behind me locked their brakes and managed to slow their vehicle down before possibly colliding with me. I let the slower traffic on the right pass and signaled to get back in the right hand lane. This has happened twice to me and I think there is a real possibility this could endanger lives and property if not corrected. My 2011 Ford F-150 is equipped with the 3.5 liter ecoboost V6.

- Hillsboro, TN, USA

problem #82

Jun 152013

F-150 6-cyl

  • 34,000 miles
The contact owns a 2011 Ford F-150. The contact stated that while driving approximately 75 mph, the vehicle decelerated independently. The contact was able to merge to the shoulder of the roadway and regain acceleration power. The manufacturer was not made aware of the failure. The vehicle was not repaired. The approximate failure mileage was 34,000.

- Bryan , TX, USA

problem #81

Jun 282013


  • 3,500 miles
The contact owns a 2011 Ford F-150. The contact stated that while traveling various speeds, the vehicle suddenly lost acceleration power. The vehicle was taken to the dealer where it was determined that the inter cooler had failed. The vehicle was not repaired. The manufacturer was contacted about the failure. The failure mileage was 3,500.

- Riceville, TN, USA

problem #80

Dec 102012


  • 2,000 miles


The contact owns a 2011 Ford F-150. The contact stated the vehicle loss power when accelerating. The contact stated there was a long hesitation prior to the vehicle accelerating. The vehicle was taken to the dealer and the turbo intercooler was replaced. The computer was also reprogrammed but failed to correct the failure. The VIN was not available. The failure mileage was 2,000 and the current mileage was 6,000.

- Windber, PA, USA

problem #79

Jun 012012


  • 1,000 miles
Poor gas mileage. Window sticker says 23 mpg highway, best I ever got is 16 mpg, with cruise set at 65 mph on flat level highway. Had at dealer, 4 times, they updated computer, changed turbo intercooler and they still cant improve my fuel economy. Around town I get 12 mpg. Bad turbo lag when pulling out low power, dealer said its how turbos work. Doors rattle, speakers crackle, rear end springs make a creaking sound. 4 wheel drive makes a loud growling, sounds like gears are not meshed right. I would not recommend a new F-150 to any one. Nothing but trips to the dealer and let downs.

- Windber, PA, USA

problem #78

Apr 012013


  • 100,000 miles
The contact owns a 2011 Ford F150. The contact stated that while driving 60 mph, the vehicle vibrated and lost acceleration power without warning. The failure was experienced numerous times. The vehicle was taken to the dealer several times for the failure. The coils spring was replaced several times; however the failure was not corrected. The vehicle continued to vibrate and would also stall without warning. The VIN was not available. The failure mileage was 100,000 and the current mileage was 108,163. The VIN was not available.

- Mcindoe Falls , VT, USA

problem #77

Jun 122013

F-150 6-cyl

  • 55,500 miles
Was high speed accelerating in NJ from one hwy to another. Long on-ramp. During acceleration from about 40-45mph to get to 65 highway speed, the truck acceleration stopped truck shook, speed declined and the check engine light came on. I let off accelerator and 3-4 seconds later shaking stopped and check engine went off. I slowly came back on with accelerator and issue stopped. Weather conditions was rainy/wet/humid about 60F ~ 1000am. This is 3rd time has happened. First time was shortly after receiving truck new in 2011 ~ April in same conditions and second time about 1 year after that. First time and this time I took to local Ford dealer and they found no codes. This recent I also started losing mpg from normally ~16.9 mpg and down to 12 mpg now. Dealer said they relayed info to Ford and said replace spark plugs as no codes. I have others who have same truck bought for a company fleet with sequential VIN's that have had same issue and had catalytic converters replaced. My dealer said Ford refused.

- Oakville, CT, USA

problem #76

Mar 152013


  • 20,000 miles
The contact owns a 2011 Ford F-150. The contact stated when the vehicle was turned on the engine idled excessively and the began to smoke. The failure was experienced numerous times. The vehicle also stalled while driving approximately 20 mph. The contact was a able to drive onto the emergency lane and restart the vehicle; however, when the accelerator pedal was depressed the transmission disengaged and the rpms increased. The vehicle was taken to the dealer for diagnostic testing but they were unable to locate the failure. The dealer replaced the turbo charger line; yet, the failure was not corrected. The manufacturer was made aware of the failure. The failure mileage was 20,000. The current mileage was 23,800.

- Paris , TX, USA

problem #75

Feb 112013


  • 40,500 miles
Related to the F-150 ecoboost investigation : PE 13-018 date opened: 05/22/2013. My truck had the same intermittent stumble/misfire on acceleration described in the investigation above. I was driving on a highway early morning during a heavy rain storm. As I accelerated to pass a car the truck began to shake violently and lost all power. I was forced to cut a vehicle off to pull over and shut the truck off. I was able to restart it and bring it to the dealer who told me that nothing was wrong with it.

- Westerly, RI, USA

problem #74

Dec 212012

F-150 6-cyl

  • 32,964 miles
The vehicle was being driven for approximately 300 miles when while attempting to pass another vehicle (accelerating from ~50 mph to ~65 mph) the engine lost all power. As the vehicle coasted back into the lane of travel power was restored to the engine. The following week the vehicle was inspected by bill brown Ford in livonia, Michigan. The dealer stated they could not find anything wrong with the vehicle but there was a technical service bulletin from Ford for the inter-cooler. However the necessary parts were on back order for over 3 months.

- Smethport, PA, USA

problem #73

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 #72

Jun 102013

F-150 6-cyl

  • 44,566 miles
It was raining very hard, and I had a cell phone call come in. I was on I-75 southbound. I pulled off the road to take the call. After approximately 15 minutes, I put the truck in "drive" and started to pull back onto I-75. At about 25 mph, I pressed the accelerator to the floor, and it sounded like the turbo waste gate opened fully. The truck stopped moving forward and began to shake very hard. There were 2 semi's coming toward me honking their horns. I released the accelerator and steered toward the shoulder of the road again. The truck limped off the highway, still shaking, but with less vigor. After approximately 2 minutes, the idle smoothed out somewhat, and eventually the truck ran smoothly. It took about 5 minutes. I took the truck to brondes Ford in maumee to have it checked. I had an appointment Friday, June 14. When I explained what had happened, the service advisor said she would have to check with her boss. She came back and told me there was nothing they could do, because no code lights were on and the truck wasn't doing it now. I asked if they could run a diagnostic and she said "no, bring it when it's doing it, and we'll check it". if it happens in front of 2 semi's again, I may not be able to bring it in! I could have been killed! I can't believe they refused to even run a diagnostic on it! this is a serious issue in my mind, but brondes Ford does not seem to feel it is a problem.

- Toledo, OH, USA

problem #71

Mar 142011

F-150 6-cyl

  • 21,300 miles
Lost power, engine died under hard acceleration while trying to pass a car. Checked with the local Ford dealer and the customer relations center at Ford and they claim they never heard of such a problem.

- Lambertville, MI, USA

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