The contact owned a 2011 Ford F-150. The contact stated that while driving approximately 35 mph, the vehicle hesitated to accelerate. The failure recurred intermittently at different speeds. The vehicle was towed to the dealer for diagnosis three different times. The technician was unable to diagnose the failure. Additionally, the contact stated that the fuel gauge would not display accurate fuel readings. The vehicle was taken to the dealer for diagnosis. The fuel sensor was replaced. The vehicle was not repaired. The VIN was not available. The approximate failure mileage was 4,000.

- Donalds, SC, USA

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

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

On Friday 4/12/2013 I was in a very dangerous situation. I was driving my 2011 Ford F-150 home from a night out with the family. It was kind of late, when I ran over an exhaust pipe, which was laying on the road. I did not see it. It was a fairly small pipe. Once I stopped I realized that it put a hole in my fuel tank. And it was gushing out fuel. It was coming out faster than water from a kitchen tap. Luckily I was only two blocks from home, right across the street from a fire station. I was able to get my truck home, once the fuel was out of the tank. There was a split in the tank about 6 inches long, like it had been cut with a very sharp knife. This is a plastic fuel tank. When I look up fuel tank part number 9L3Z-9002-B on Ford parts dot com for my truck they also show a skid plate number 9A147. My truck does not have this part. The fuel tank is an obsolete part there are only 4 in the nation available. I am looking. Not having this part is a safety issue.

- Dublin, IN, USA

My truck is equipped with the ecoboost 3.5L engine. Twice now I have attempted to accelerate and had the truck lose power and shake violently, creating a very dangerous situation. The first time was attempting to pass another vehicle. Weather conditions were warm (75 degrees F) with light rain. I pulled out to pass and attempted to accelerate when the truck suddenly acted as if the gas was shut off. It then began to shake and shudder violently as if the rear axel was being ripped from beneath it. I was able to fall back behind the vehicle I was attempting to pass, out of the way of oncoming traffic, and pull to the side of the road. After shutting off and restarting the truck, it seemed to run normal. The dealership service tech inspected the truck and stated it is a problem Ford is aware of (in wet conditions), but has no fixes. The second time I was attempting to enter the interstate from a rest stop into a single lane construction zone. The weather was cool (45 degrees F), dry and sunny. I attempted to accelerate to enter the highway and the truck acted as it did on the first instance. I was forced to pull off of the lane between two large construction pylons in order to avoid being struck by a tractor/trailer. The supplied dates, mileage and speed were from the most recent incident.

- Marseilles, IL, USA

Yesterday I went to pass a truck that made an illegal turn, and had to hit the gas hard to get out of the way, only did it for about 2 seconds, than when I let off the gas, the engine kept running at high speed for about another 3 seconds? and my foot was not on the pedal at that time.

- Leesburg, GA, USA

Under hard acceleration into traffic or when passing, vehicle will suddenly lose power and go into a "limp mode." This condition is thought to occur because of engine misfire and several factors have been identified that can cause this in the ecoboost 3.5L V6. The dealer has replaced ignition coils with no success in correcting this issue. My service manager shared with me that Ford engineering is well aware of the issue and has yet to come up with a solution to correct it. In the meantime, my family is placed at risk of an accident because there is no way to predict when the engine will suddenly lose power when you need it most for passing or merging situations. This becomes even worse when pulling a trailer. NHTSA should demand that Ford immediately recall and repair these vehicles, or replace them until an appropriate solution is found to remedy the misfire condition and resultant lost of power.

- Chesterfield, MO, USA

Fuel filler no longer closes. Will not keep dust water and debris out. Broken hinge. Was told at dealership it is common on the capless fuel filler models.

- Howell, MI, USA

The ecoboost version that I own has an apparently "known" problem within Ford where condensation builds up because of the turbocharger intercooler to the point that when you need to accelerate heavily to avoid a problem, to pass someone, or simply to get on a busy street or freeway, the truck sucks all that water into the engine and it completely misfires similar to just running out of gas. When this happens it can easily cause and almost has caused an accident. This happened first at about 700 miles and has happened numerous times since especially in high humidity. I keep hearing about "some fix is being considered by Ford engineering" and that the problem is in the Ford oasis problem reporting system number [xxx] I believe but 7 months later I am still waiting for Ford to step up. This problem can and I expect will get people killed and that's just sad. Information redacted pursuant to the Freedom Of Information Act (FOIA), 5 U.S.C. 552(B)(6).

- Bel Aire, KS, USA

Engine, the turbocharged V-6 ecoboost, stalled out (tried to die and shook and and shuddered like nothing I have ever experienced in 50 years of driving) when attempting to pass a truck on the interstate and again when pulling away from an exit stop sign after traveling in cold rain. Glad I was on a freeway vice two lane road. Takes about 15 to 20 seconds for the engine to get power back. Also it did the same thing 3 weeks earlier, on same cross country trip, in northern Idaho when I attempted to accelerate to freeway speed after driving in wet snow for about 1/2 hour. Really felt unsafe. I reported it to Ford. They acknowledged there is a problem but they have not done anything to fix my truck after I reported the near disastrous drivability issue - like can't be trusted to adequately perform in rain and I live in the pacific northwest.

- Bremerton, WA, USA

Driving down a two lane road in the early evening, I was 3 or 4 cars back in a long line of over a dozen vehicles. We were all stuck behind one slow moving vehicle. A chance came up to pass and I pulled into the other lane. After stepping on the throttle the truck developed a misfire. It lost nearly all power and began decelerating. In the time since pulling out to pass, a semi truck had popped up over an upcoming hill. By this point, the vehicles previously behind me had moved forward and filled in my place in line. I began evaluating my options. I was now moving slower than the traffic in the right lane, but there weren't any openings to move back over. I examined the shoulder on the left side of the road looking for safe places to pull over. There were none in the immediate vicinity. After several very tense seconds, the vehicle suddenly regained power. I had just enough time to accelerate to an opening in the right lane and get back over. Likely cause: Condensation in the charge air cooler ingested into the engine upon a call for power. Since the first incident this has occurred several more times. Every single time has been after cruising for some period at less than half throttle, followed by a sudden acceleration in humid or rainy conditions. Ford claims to be aware of the problem and working on a fix. However after waiting for over 8 months since my first incident I'm starting to have my doubts. I have heard reports from numerous other people saying this exact same thing has happened to them. Some of those are over a year old and are still waiting on a fix from Ford. Being aware of this problem I try not to put myself into a situation that will require the sudden application of power. However I know no matter how well you plan, eventually you find yourself in a bad situation. I just hope when that occurs it isn't a humid or rainy day.

- Seneca, SC, USA

While entering a highway via an on-ramp doing about approximately 45 miles per hour I attempted hard acceleration to pick up speed and merge in to traffic that was doing approximately 65-70 miles per hour. When I depressed the throttle the vehicle did not accelerate, but it started to hesitate and shake. The check engine light came on and the vehicle would not go over 40 miles per hour. This almost caused an accident situation as I expected the vehicle to accelerate when it did not. I was then forced to pull over to the shoulder and shut the vehicle off. After restarting the vehicle the cel had cleared and the vehicle was operating normally. No code was stored in the PCM to indicate what the issue was. This happened several more times since the first incident. Once while towing a 4000lb boat/trailer which also almost caused a severe accident. Ford has found nothing wrong with the vehicle and concludes there is nothing they can do since no codes were stored. I will note that after receiving tsb 12-2-10 the vehicle will still exhibit the same symptoms described above, but now the check engine light does not come on. Vehicle will stall, go in to "limp mode" with no indication that anything is wrong. Only resolution is to turn the vehicle off and back on to clear the status. This creates dangerous situations when on a highway. Completely unacceptable.

- Concord, NC, USA