really awful
Crashes / Fires:
3 / 1
Injuries / Deaths:
0 / 0
Average Mileage:
42,781 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

Find something helpful? Spread the word.
Get notified about new defects, investigations, recalls & lawsuits for the 2011 Ford F-150:

Unsubscribe any time. We don't sell/share your email.

2011 Ford F-150 Owner Comments (Page 8 of 17)

« Read the previous 20 complaints

problem #196

Sep 122012

F-150 6-cyl

  • 34,000 miles


Vehicle has approximately 130,000 miles. I have had the timing chain replaced, the plugs have been changed 3 times, the ignition coils have all been changed. The is an intermittent misfire which is unexplained. Ford does not have an answer for the ghosts in this machine. Upon searching the timing chain issue in the F-150 ecoboost, I have found that I am not alone, however was unlucky that mine was out of warranty. I do mostly highway driving with this vehicle. Most cases online are under 90,000 miles. It is absurd for a vehicle to experience these kind of issues with the highway driving. This is also the same engine that is being supplied to our law enforcement agencies in Ford interceptor and Explorer models. I am sure this issue would become escalated the moment an officer cannot pursue a vehicle because of misfires and bad timing.

- Howell, MI, USA

problem #195

Jun 272014


  • 54,000 miles
Driving down the highway at 75 mph for an extended period of time in high humidity. Pushed the pedal down to pass a couple trucks going up a mountain and the engine began misfiring and stuttering. There was loss of power and vehicle went into limp mode with flashing check engine light. Failed to passed the trucks causing a dangerous condition by producing unexpected results. This problem is detailed in Ford's tsb 13-8-1. I believe that this is a dangerous condition and a recall should be issued for this condition.

- Hilton, NY, USA

problem #194

Jun 272014

F-150 4WD 6-cyl

  • 68,500 miles
I own a 2011 F150 4X4 supercrew ecoboost, this is the second time I've had this problem. I was pulling a trailer weight approx 2500lbs on the highway going up hill for an extended period of time. My truck loss all power and I barley made it to the top of the hill. I pulled over checked out the truck and the problem disappeared. The 1st time this happened I took it to the dealer and they did the tsb, replaced all spark plugs and replace one ignition coil. Cost around $800 but the problem still happens, I'm afraid to put any load on the engine. This is a problem with condensation in the inter cooler that causes a miss fire but Ford will not address the problem. I'm hoping for a recall soon before someone is seriously hurt or killed by this malfunction.

- Tempe, AZ, USA

problem #193

Jun 182014

F-150 6-cyl

  • 53,600 miles


2011 F150, 3.5L ecoboost motor, vehicle shudders and loses power during acceleration. Dangerous to try and pass vehicles or even change lanes to pull over as there is power loss from engine. Taken to dealer and they performed Ford tsb 13-08-01. This did not fix the problem. The engine misfire continued, after returning to dealer the vehicle showed code related to same tsb after it had been applied. Dealer cleared code. I have since replaced spark plugs and so far has not recurred. I have seen quite a few reports of this same issues on many Ford F150 forums. I would say Ford really needs to look into this problem.

- Milford, NH, USA

problem #192

Jul 012014

F-150 6-cyl

  • 85,266 miles
As I was merging onto the highway, I had to accelerate to avoid a semi who was approaching in the right lane. I hard accelerated, but the truck started shaking and the check engine light began flashing. I had lost all acceleration and was forced to put my flashers on and merge to the break-down lane to avoid being run completely off the highway. The truck shook violently while in 6th gear and I had to manually shift to 5th gear to stop the truck from vibrating apart. Less than 10 minutes later (while driving down the highway in 5th gear) the check engine light turned off and the truck was able to be shifted back into 6th without any vibration. This lack of acceleration is extremely dangerous and has happened more times than I can count. Above was only an explanation of the last occurrence. The truck has been serviced (under warranty) where issue was discussed with Ford, but they were unable to "reproduce" the problem...

- Houston, TX, USA

problem #191

Jun 252014

F-150 6-cyl

  • 55,000 miles
As I was merging onto highway 694 North, I had to accelerate because of a semi approaching me from behind, I gave the truck full throttle but the truck started shaking and the engine felt like it quit or just had no power left. The truck struggled to reach 55mph, and within seconds I almost got rear-ended and almost ran off the highway, do to the fact that my truck had no power. After I merged onto the highway the truck shook violently for about 3 miles while my check engine light was flashing. During this time it felt as though my truck had lost 50% of its power.

- Oakdale, MN, USA

problem #190

Jun 152014

F-150 6-cyl

  • 57,000 miles


I went to pass another vehicle and the engine bogged with all loss of power. It was the second time this happened. The check engine light came on and engine shuddered and would not regain power until I stopped the truck and shut it off then re-started it. The first time this happened the check engine light went off and when I took it in to the dealer they could not find any issues when the diagnostics were run. The second time it happened, the check engine light came on and stayed on. Truck is currently at the dealer and I am waiting to hear their findings.

- Porterfield, WI, USA

problem #189

Jun 062014

F-150 6-cyl

  • 43,000 miles
I experienced lack of acceleration, sputtering, shaking from the vehicle while trying to pass on a 2 lane rural highway. This is second event of this nature and the first since having Ford make certain repairs to engine to correct this issue. I have the V-6 eco boost engine. I am unhappy that this engine encounters this problem and it could result in a wreck with loss of life. This should be taken seriously!

- Franklin, TN, USA

problem #188

Jan 052014

F-150 6-cyl

  • 35,000 miles
I experienced lack of acceleration, sputtering, and shaking when trying to accelerate onto the interstate from a merge ramp. This event nearly caused a serious accident. My expectation was for vehicle to perform at normal standards and get me safely onto the highway. It failed to do so!

- Franklin, TN, USA

problem #187

May 272014

F-150 6-cyl

  • 40,500 miles
I was merging into traffic after picking up my daughter from daycare. I pressed down on the accelerator firmly to gain speed to get into traffic. My truck stalled with a pinging noise coming from the engine and an uncharacteristic black smoke pouring out of the exhaust pipe. Oncoming traffic had to brake to avoid hitting my truck on my daughters side. The truck recovered but only gradually picked up speed with very little power. It was a low constant acceleration. This is the 4th time this has happened with my truck but this time it endangered my daughter so I feel that I need to speak out. This needs to be addressed before my 1.5 year old daughter or someone else gets hurt due to faulty equipment.

- Gilbert, AZ, USA

problem #186

Oct 162013


  • 33,500 miles


I own a 2011 Ford F-150 ecoboost and have had issues that Ford wishes to ignore and which I consider a serious safety hazard. Approx. Oct 16, 2013, while driving on interstate during rainy weather, I accelerated to pass, on the left, a tt/St that was in the right lane. As I started to pass, at approx. 3500 RPM, the engine stalled and the check engine light flashed. I was nearly rear ended by the vehicle that was behind me, due to the stall and sudden deceleration. I brought the vehicle to the Ford dealer on several occasions and to this date the same thing occurs, only this time the check engine light stays on. Ford's fix is to replace the coil and all six spark plugs at a cost of $400, stating the issue is a maintenance issue not covered under warranty (vehicle still under warranty). Ford refuses to recognize the danger this problem creates for the occupants and would rather use a band-aid approach, rather than fix the problems, which appears to be moisture dumped into the engine from the cold-air-charge(intercooler) for the turbos. I have done my homework and have found this to be a common issue and in most cases, Ford replaces the ignition coil and spark plugs, only to have the same thing happen again. Again, Ford is putting the occupants of these vehicles at risk caused by the sudden deceleration and refuses to do the right thing and repair the problem.

- Mokena, IL, USA

problem #185

Apr 012014

F-150 6-cyl

  • 49,000 miles
While trying to pass a vehicle on the highway my truck started to sputter and loose power, the check engine light came on for a few seconds and went off. This problem is happening every day now under all conditions. There are numerous complaints on this problem and no real resolutions.

- Plantation, FL, USA

problem #184

Apr 232014

F-150 6-cyl

  • 48,750 miles
While traveling down the road and the need to accelerate to pass a much slower vehicle my truck lost all power and began shuddering very bad. With oncoming traffic approaching quickly I had to step on the brakes rather hard and quick to avoid a accident. What would have possibly happened if I was towing a legal but heavy load? Ford has a known problem with the coils on the ecoboost and this truly needs to be addressed. This is a extremely serious traffic safety when you loose all power and the severity of the shudder that also occurs.

- Taber, AA, USA

problem #183

Sep 102013

F-150 4WD 6-cyl

  • 43,364 miles
During acceleration to merge onto the highway, my F-150 lost power. The engine began to sputter, the check engine light illuminated, and the truck lost power. An 18-wheeler behind me had to slam on his brakes to avoid hitting my vehicle as I moved it to the shoulder of the road. I took the vehicle into the Ford dealership and they performed tsb13-8-1. as of today (4/28/2014), the issue has not been resolved. I just took my truck back into the dealership to have another tsb performed. This time, I had to pay $100 because my powertrain warranty had expired. My main concern is that the tsb's that Ford is issuing are inadequate. I have been told that the cause of power loss is moisture that builds up inside the intercooler. The last fix was to place a piece of plastic over the intercooler in an attempt to raise internal temperatures and prevent moisture from building up. It did not work...and my mpg went down by 1.8 (average) with the fix. My main concern is that Ford will continue to release inadequate solutions to this problem, and once my esp has run out, I will be left with a truck that doesn't work and with no other choice but to pay for expenses 100% out of pocket. Hopefully something is done to prevent this from happening. I am not a very satisfied customer at this time.

- Collierville, TN, USA

problem #182

Apr 142014

F-150 6-cyl

  • 43,980 miles
I accelerated hard on a highway entrance ramp and the engine started to stutter to the point I thought it might stall out. I let off the gas and accelerated again more slowly with no problem. Thinking it was a one off I accelerated hard again and again the car stuttered. I went easy for a couple days and then again accelerated hard a few days later with the same result. I got online and realized I wasn't the only one having issues with this engine. On 4/18/14 I took my truck to the dealership(landers Ford, collierville, tn) and reported the problem. They were familiar with it and said there was a fix. This fix included installing a moisture deflector and reprogramming the computer. It was performed and I left the dealership. Yesterday, 4/23/14, it happened again. I am planning on going back to the dealership tomorrow.

- Collierville, TN, USA

problem #181

Feb 052013

F-150 6-cyl

  • 40,881 miles
When attempting to pass a slower moving vehicle, I moved into the left pass lane and pushed on the gas, the truck began to shudder violently, lose power, and the check engine light came on. I took it to the dealership where I bought it and they did the intercooler fix. After that the problem continued. Check engine light came on, took back to dealership, they told me it was a spark plug, replaced it, on the drive home same problem, engine shudders violently, loses power, goes into limp mode, and check engine light either flashes or goes solid. I have had this problem since the day I purchased the truck new from the dealer.

- Mercer Island, WA, USA

problem #180

Apr 182014


  • 63,150 miles
The truck is new to me and will miss in cases of acceleration on the highway or getting on the highway. If it were a smaller vehicle, I know I would have been run over today when trying to enter the highway already at about 60-65 mph and the engine sputtered and felt like it quit and I had to run on to the side of the road to not get hit. It has been sputtering/missing alot but never to that extreme. I hear there is an intercooler problem with the 2011 econoboost engine after asking around. Supposedly, their is moisture building up in the intercooler and is horribly damaging to the engine..

- Lewisville, TX, USA

problem #179

Oct 212013


  • 42,000 miles
The contact owns a 2011 Ford F-150. The contact stated that while driving approximately 40 mph, there was a loss of power in the engine during acceleration. The vehicle was taken to the dealer where it was diagnosed that the inner cooler needed a protective shield to reduce the inner flow. The manufacturer was notified of the failure. The approximate failure mileage was 42,000.

- Fort Pierce, FL, USA

problem #178

Mar 272014

F-150 6-cyl

  • 56,500 miles
Engine stumbles or misfires at highway speeds, which lead to a loss of power when accelerating.

- Frisco, TX, USA

problem #177

Mar 042014

F-150 6-cyl

  • 50,000 miles
Having issues with Ford F-150 ecoboost engine losing power during acceleration, on our 2011 model. We have advised Ford on this issue, since it's a safety concern, that can lead to a crash or even injury, however Ford is not doing anything about it...please help us out !!! the safety of millions of people that has purchased this model truck is in your hands. It's very dangerous to drive the truck on the highway due to the sputtering, that causes you to stahl out... this is a serious issue... me and my kids almost had an accident due to this factory defect. Please have this truck re-call, or investigate on this matter. Thank you.

- San Antonio , TX, USA

Read the next 20 complaints »

Not what you are looking for?