After driving in rain for a couple hours in my ecoboost F150, I was merging onto an interstate where traffic required heavy acceleration and the vehicle stalled from 60-65 abruptly to 45 mph. The vehicle shuttered and would not accelerate back to highway speeds for nearly a minute. The engine ran extremely rough and was unresponsive to throttle input from driver. I had my family with me and was very upset that we could have been in a very bad accident. The dealership did not inform me of problems with the ecoboost at the time of sale, even though this problem has been going on since the ecoboost introduction. This is a serious safety issue and I find the NHTSA has failed to recall these trucks. The dealership where purchased is marler Ford, near alexandria, la. You are not to use my personal information in anyway except to handle this complaint. Which includes but not limited to selling or otherwise providing this information to outside agencies.

- Ball, LA, USA

This is the third time the vehicle has done this to me while driving at highway speeds the vehicle (ecoboost motor) the engine has shuddered and lost all powers when attempting to pass another vehicle or accelerate. On the first instance I was on a two lane road attempting to accelerate to pass a semi truck when the truck started missing so bad it choked out and shut down in the middle of the road with oncoming traffic I had to swerve into a ditch to avoid a head on collision. The second time was on a four lane during a 45 minuet drive when I went to pass it lost all power causing me to drop to 40 miles an hour in the passing lane of a highway causing many vehicles to swerve to avoid collision. The most recent time was when same as the second going to pass somebody the truck lost all acceleration would not get out of the way of traffic nearly causing another accident. I have had it into the dealer several times and I am constantly getting we see the history code but we can not reproduce the problem. This problem has left me feeling unsafe to drive my vehicle and hurting resale value as well as putting my safety on the line.

- Loveland, OH, USA

Upon acceleration to pass on freeway, engine shudders and loses power. Transmission down shifted to try to recover, but engine would not respond to throttle press. Had to back off on throttle and move to right lane all the while thinking to take the truck to the shoulder. Very scary when trying to pass and no power. Luckily I was not rear ended for slowing down so fast!

- Saint Helen, MI, USA

Driving down highway at approximately 60-65mph when I attempted to accelerate. Vehicle began to stall/shake and lose power. I was unable to accelerate while the vehicle was shaking. Check engine light began to flash on and off.

- Baytown, TX, USA

We bought our 2013 F150 XLT 4X4 V6 flex fuel at denham Ford in wetaskiwin alberta. We traveled across country to Ontario. We have continued to drive it. Approximately 9000 kms for mileage our truck has steadily lost acceleration power. Going up burlington skyway and garden city skyway (100 km/H major highway) truck struggle to maintain 60 km/H uphill with pedal to the floor! had instrumental panel problems improper display of amount of gas or distance to E. driveshaft constantly clunking and transmission slippage. Ford refused to replace after towing of problems and constant call ins to customer service. Took to local dealer and 7-8 technicians stood round scratching head replaced fuel pump did not make a difference. Ford ask for payment $558.08 we not have funds as all of our money going into gas to repair truck and false reading on panel and Ford refused to help us. We felt used and scared of being rear ended by a semi was not safe. Did diagnostic no codes. Beyond code problem. First known problem in North America...huge lemon.

- Camden, AR, USA

I was merging onto the highway while it was raining. In attempting to accelerate to merge in front of a semi my vehicle stated shuttering violently and lost power. I could not get past 40mph. The check engine light was flashing. This was after the truck had been running for two hours. The semi almost rear ended me as I got off the road as soon as possible. I shut the truck off and restarted the engine and it ran fine after that. I took the truck back to my dealer the next day and they could find nothing wrong, not even an error code. The truck has a Ford 6 cylinder eco boost engine.

- Rockford, MI, USA

My family was driving home from a trip on the interstate in rainy weather conditions for the majority of the trip. On two or three different occurrences, when accelerating to pass or merge, the truck engine shuddered and failed to provide power necessary to accelerate. Never did it completely stall, but there was a noticeable shuddering of the engine and the truck felt like it was riding over rough pavement. I had read about this issue with the ecoboost engine in the F150 (unfortunately after I bought the truck) but had never experienced it until yesterday. When I felt the shuddering of the engine, I eased off the gas and gently reapplied as I had heard about instances of the vehicle completely stalling when pushing the accelerator to the floor. If it would have stalled last night on the interstate, in stormy weather, late at night, it would have been a scary and very dangerous incident. When I called my local Ford dealer today and asked him about service bulletins, recalls, or possible fixes, he acted like he had never heard of the issue before...

- Trenton, OH, USA

Driving new Ford 2013 F-150 with the ecoboost engine. It was raining at the time. I tried to pass a vehicle and it went into limp mode, engine light came on and would not accelerate. This happened again several weeks later and the check engine light stayed on. I took it to the dealership and they replaced #6 spark plug and the catalytic converter. The problem happened again. Now I hardly drive the truck and it stays in the garage especially on rainy days.

- Cookeville, TN, USA

Loss of power under acceleration while driving on I 95, attempting a lane change when power dropped, almost hit by a tractor trailer, pulled over finally and sat for 15 minutes then coasted to my destination. No engine warnings or lights/faults registered. Happened on two more occasions since then. The first time, I took it to my dealer service department and they said they could find nothing wrong. My truck had all the updates they said. The second and third times were on back to back days. All occurrences were during rain driving. The servicing dealer now says there is tsb on the intercooler and they will fix it.

- Waxhaw, NC, USA

When first accelerating early in the morning the truck accelerates suddenly when 1st taking off. This really became a problem when someone stepped in front of me, the truck took off and then I had to stop suddenly. I have reported to Ford and taken it in twice, but they insist no one has had this problem. The motor's RPM fluctuates about 200-300, then settles down.the visibility has been a problem since day one. Ford replaced the wiper blades, but the problem is still there. I have back to the dealer 3 times and all they say is "we can duplicate the problem".

- Pearland, TX, USA

While trying to merge into traffic I pressed the accelerator to the floor to get the truck up to the speed of traffic flow.I had no response from the engine for approx 1 to 2 seconds. This put me in a very dangerous situation as I had to get on the brakes hard to slow the vehicle on the on ramp to keep from getting hit by the faster traffic on the highway. In addition the traffic behind me had to rapidly slow down to keep from hitting me.we took the vehicle into the Ford dealership on Monday 30 Sept 2013. This was ruidoso Ford in ruidoso New Mexico. They checked the vehicle and said there was no problem with it and that they knew of no other problems of this type on 2013 F-150 fx-4 pickup trucks. I am still in the talking stages with them about this problem as I feel they have made little effort to solve it and the research I have done indicates that Ford Motor Corporation is aware of this problem. (this problem has happened to me several times since I purchased this vehicle, I thought that after the break in period, as the truck was new when purchased this problem would go away but it has not. Also this truck does not get the gas mileage that it is claimed to get.

- Laluz, NM, USA

Ford F-150 ecoboost loss of power. - trying to pass a semi on the highway when the vehicle stumbled after a downshift, lost power, check engine light flashed, and the vehicle started to shudder. Tried to pull off of side of road but once I was able to get over to the median, the light stopped flashing and the shudder went away as did the light. It was in the mid 60S, I had traveled about 120 miles on the highway at about 70 mph in Ohio on I-75 South of toledo. It had been raining off and on all day.

- Wilder, KY, USA

I was driving at 48-50- mph when I decided to pass a cement truck that was going below the speed limit. As I pulled out to pass the truck everything seemed fine. When I got alongside the cement truck my truck started to hesitate and misfire. The engine light started flashing. I was stuck from going back as another car was behind me, also trying to pass the slow truck. I barely made it past the cement truck as an oncoming vehicle had to swerve into the shoulder to miss me and the vehicle behind me. When I returned home I looked up ecoboost problems on the internet and found numerous other people with the same problem. Thankfully no one was injured or killed today, I believe the it will only be a matter of time before there is a fatality if there hasn't been one already.

- Muskego, WI, USA

I was driving from milwaukee to des moines on Sunday Sept 15th, 2013, and when I went to pass another driver in dubuque that pulled in front of me the truck lost power and failed to accelerate as I anticipated. It was raining off and on throughout the trip, temp was 55deg, and I had been on cruise control for the majority of the time before this happened. Basically, I went to change lanes and pushed the accelerator pedal and instead of gaining speed quickly I received no acceleration causing the cars behind me to have to brake quickly. During this time the check engine light was flashing indicating a mis-fire was occurring at which point I knew what was happening and got off the highway and the mis-fires ceased and after a brief stop I was able to continue my drive. My truck was built on 1/15/2013 and has all the updates to the intercooler Ford claims addressed the issue. The issue is definitely not fixed and despite Ford claim in their response to the NHTSA investigation this is a safety issue. Ford also claims in their response to the NHTSA investigation that many complaints are just against the dealers and not for safety concerns so let me be perfectly clear here this is a safety complaint!

- Ankeny, IA, USA

Purchase date 02/28/2013 August 24, 2013 " my wife was downstate school shopping for my son and pulled out on telegraph road. Because it wouldn't accelerate, an accident was almost caused. The truck started shuddering and would not go faster than 5 mph. It went into protection mode. Took the truck into gaylord Ford, gaylord Michigan on August 26, 2013 to have them check why it would do that. They kept the truck all day and I was told they couldn't find anything wrong with it. August 30, 2013 ? my wife and son just turned off highway 65 onto highway 72 and my wife was at 45mph trying to get the truck to 55mph. The truck started to shudder and dropped from 45pm to 5pm. Almost causing her to hit a guard rail because there were cars behind her. It was taken by flatbed to zubeck Ford in oscoda, mi. The mechanic said it came back with 25 error codes and is unsafe to drive. September 2, 2013 " the truck still sits at zubeck Ford

- Johannesburg, MI, USA

While driving on a highway at 75 mph I accelerated to pass a car and the check engine light began flashing and the truck started shuddering and would not accelerate, it started decelerating. I pulled off the road and put the truck in park. I revved the engine until the turbos started spooling normally again.

- Wilmington , NC, USA

Attempted to enter interstate traffic from an on ramp. Attempted to accelerate to speed and merge into traffic. The engine lost all power and failed to accelerate, the vehicle shook violently and slowed. A malfunction indication light began flashing on the dash. A vehicle behind me had to pass me on the shoulder to avoid a rear end collision. The condition cleared itself after approximately 20 to 30 seconds. I was approximately a hundred miles into a 150 mile trip in rainy weather. Returned to the dealer the following day who retrieved numerous misfire codes from the ECM (dtc P 0903, P 0904, P 0905). Dealer re-programmed the ECM and informed me I would have to drive it and see if that works. Performed research to see if this was a common issue with the ecoboost engine and found that indeed it was, that the condition has existed since at least 2011 model year and to date there appears to be no clear fix from Ford. Additionally, despite well over a hundred complaints about this dangerous condition, that no action has been taken by the nhtsb. It is my most sincere hope that it does not take a fatality to spur action on this condition.

- Norfolk, VA, USA

2013- Ford F150 ecoboost: I was driving along at highway 100km/hour highways speed. I came upon a car going 70km/hr. It was safe to pass, and as I stepped on the gas to accelerate, my truck lost complete power and decelerated to about 40 km/hr, eventually slowing right down. I tried frantically to push the gas, as there were two semi trucks behind me trying to pass at the same time as me. The trucks both ended up having to pass me unsafely on the shoulder to the left of me, into oncoming traffic. I was able to glide over back to the lane I was in, and eventually rode the shoulder. I continually tried to get power to the vehicle. My engine light was flashing. Eventually after several attempts, my truck did "grab" and shoot forward. The engine light then went off, and for the remainder of my drive, the truck was fine. Again, two days later, the truck did the same thing, but at slower speeds in town. As I read into the issue, I found that this is a "common" problem"??" my situation too was during rainy/wet weather, long distance highways the first time, and wet weather, in town, the second time. This is a severely dangerous issue. I too brought my truck to the shop and was told that this issue was being investigated and that Ford had solution to try. What boggles my mind is that there are "solution" to try, which means this problem was known, yet when I bought the truck the dealership did not make one single mention, even when I asked if they had heard of any issues with the ecoboost system! the shop just updated the computer, an a day later, it happen again! :) I'm no longer driving my truck on the highway. Not sure who to contact to return my truck. I don't even want it anymore!

- Prince George, AK, USA

While trying to pass slower vehicles on the freeway my F150 ecoboost engine lost power and the truck started to shake. This situation almost cause a serious accident as traffic behind me had to rapidly slow down to allow me time to pass the slower vehicles and get out of the way.

- Kentwood, MI, USA

Reduced engine power during hard accelerations with the 5.0 V8 engine. Safety issue pulling out into traffic or needing to accel for any reason.

- Athens, AL, USA