I was merging into traffic on I-10 in Florida from an entrance ramp. I was going 55 mph when I had to accelerate in order to merge with traffic. Upon attempting to accelerate, the engine lost power and began to shake causing me to have to brake really hard and move to the shoulder of the road so that I wouldn't collide with traffic already moving at 70 mph in the lane I was attempting to merge. This is the first of several incidences in which the vehicle lost power under acceleration.

- Crestview, FL, USA

I was driving on a 2 lane highway, behind a semi truck, with several cars behind me. We came to a passing zone and I began to pass the semi truck. I moved to the oncoming lane and accelerated, but the truck lost power. I began slowing down in the on coming lane, but couldn't return to the right lane because the vehicles that were behind me were passing me in the right lane and I had a vehicle directly behind me that was followed me to pass the semi truck. I locked out 5th and 6th gears on the transmission to gain some RPM but the vehicle started to shudder violently. I moved to the shoulder of the on coming lane and shut the vehicle off. I sat on the shoulder for several minutes, got out of the vehicle and checked under it for fluids. There were no fluids under the vehicle. All the gauges read normal. I did all this on the shoulder of the oncoming lane facing oncoming traffic. This was not a good position to be in. I started the vehicle, put it in gear to see if it would move, it did. I had full power and got back into traffic and the truck ran fine. No warning lights, no indication that anything was wrong. Several miles later I lost engine power again, and again got the violent shudder, and the check engine light came on. Going to see the dealer today. This is bad! the first incident could have caused a huge accident. Moving onto that left shoulder proved to be a good move, but I was at pucker factor 10 for a few seconds.

- Newburg, MO, USA

Lost power with easy accelerating from stop light at low speed. Engine running with transmission in drive gear, but will not move while pressing accelerator. Stopped, shifted to park then back to drive and was able to move but smelled burning oil.

- Spring, TX, USA

While trying to accelerate from 50 up to the posted speed limit of 70 on interstate highway 10, the ecoboost engine in my truck stalled and started to misfire and shutter so severely causing my speed to decrease that I had to pull over to the side of the road to prevent from getting run over.

- Thicket, TX, USA

Vehicle was purchased on 3/16/13 as a demo model with 6300 miles on it. Made a left turn and accelerated to merge into traffic on 3/19/13 when the whole vehicle shuddered violently and the engine lost power resulting in people having to hit their brakes and honk at us to avoid hitting us. The engine continued to bog down as the accelerator was pushed. I let the vehicle coast to almost a stop before the symptoms went away and could drive as normal. I looked up symptoms on internet and found many people experiencing same symptoms with this new eco-boost engine by Ford in their trucks. It seems that the intercooler can collect condensation in humid or rainy environments and have that water forced to the engine when the accelerator is pushed hard causing the vehicle to shudder and lose power. Ford has apparently identified this problem and issued a tbs service bulletin instructing the charged air cooler be replaced with a newly designed one for model year 2011-2012 F-150's with the 3.5L V6 eco-boost engine if a customer complains of the above symptoms and some people have reported this solution has not fixed the problem. This is extremely dangerous as one could lose power as many have reported, towing heavy loads, on the highway passing and other situations that a loss of power could lead to a fatal accident. The "newly designed" charged air cooler has been on back order for months and people are being told to "drive their vehicles carefully" if their dealer doesn't provide a rental or vehicle to drive while awaiting repair. My vehicle was taken back to dealership on 3/21/13 and has been sitting their awaiting the part as I feel it is unsafe to drive.

- Greenwood, AR, USA

Traveling West on I-20 in tx for several hours through rain/mist/foggy conditions. Exited the highway for fuel. Upon reentering the highway and attempting to accelerate to speed, truck began shaking violently and did not respond to inputs from the throttle. I was able to speed up to about 45mph before the engine problem developed. Luckily I had a shoulder to pull over on as I had entered the interstate ahead of a tractor-trailer combo who was doing the speed limit and approaching my rear bumper very quickly. After the engine began misfiring at about 45 mph, I could not increase speed, I was only able to slow down and pull off onto the shoulder. During the incident, the check engine light illuminated, began flashing until the vehicle came to a stop on the shoulder, then remained illuminated until the truck was restarted 5 times on the shoulder.

- Eureka Springs, AR, USA

I purchased my new F-150 in August 2012 and immediately noticed a "hesitation" when starting out in drive, until the engine shifted to second gear and a "miss" in the engine when driving at highway speeds. I called the dealer, told them my truck has safety defect and took the truck back for an evaluation and oil change. The dealer told me they found no defects on the computer codes and no bulletins from Ford but "we've had several complaints from other customers about this problem. We can't do anything unless the computer shows something wrong. I called Ford "customer relationships center" in Michigan and was told to take it to another dealer for a second evaluation. I did this and the new dealer gave me the same story as the first dealer. I called the "customer relationship center" again and advised them that what the dealerships have told me is unacceptable and that I would not have bought the truck, if I had known or been told that this "defect is common" with this truck. The "crc" told me they would have the regional service manager call me, which she did a few days later and told me that "the problems you are having with your truck are characteristic of the performance of these trucks and no other action will be taken. I told the regional service manager that her and Ford' response is unacceptable and if there is no fix, I want the vehicle repurchased or replaced. She said, "no further action will be taken by Ford."

- Selah, WA, USA

While cruising at 65 mph on the interstate, heavy acceleration was applied to pass an 18-wheeler. At about 75% throttle and when the automatic transmission downshifted into second gear, the truck began vibrating violently and a check engine light appeared, blinking. Immediately letting off the throttle, the truck shifted back to sixth gear and stopped vibrating. A few seconds go by and the check engine light stopped blinking. Once I pressed the throttle again, it vibrated violently again, then stopped shortly after. The check engine light stayed solid.

- Sumter, SC, USA

2012 Ford F-150. Consumer writes in regards to transmission malfunction. The consumer stated the gear moved from park to reverse twice, since he purchased the vehicle in September 2012. The most recent incident caused approximately $5800 damage to the vehicle, plus damage to landscaping property of a business. The consumer stated he placed the vehicle in park and left it running. When he went around the truck, he saw the truck starting to move in reverse. He ran around to the truck, opened the driver's door and tried to climb into the truck, to stop it, but was knocked down to his knees and caught between the door and the door jamb on the truck. He was dragged to his knees for several feet, before he decided to let go down and rolled away from the truck. The vehicle continued in reverse for approximately 75 feet before running up over a curb and down an embankment over two trees, some small bushes and destroying 30 ' of vinyl fence before coming to a rest. On October 1, 2012, the consumer backed the truck into his driveway, placed it in park and exited the vehicle, and left it running with the driver's door open, when suddenly, the vehicle started move backwards. He tried to get in the vehicle to stop it, but was knocked down by the door. The vehicle continued back for about 25 feet hitting a landscaping boulder before coming to a stop. The consumer has since traded the vehicle.

- Eagle, ID, USA

Vehicle would not accelerate from 40 mph while attempting to merge with highway traffic. When the accelerator pedal was depressed the vehicle shuttered and would accelerate past 40 mph while trying to merge with heavy traffic going 65 mph. Continued with a very slow acceleration which took about a mile to reach 60 mph. Then the vehicle started to perform normally.

- Wichita, KS, USA

GM [xxx] at chino hills Ford failed to allow his service dept. To repair, correct or replace defective driveline or driveshaft componets that clunk and rattle on a new Ford raptor truck under factory warranty and an esp Ford 100,000 extended warranty. These faulty componets could fail and cause loss of control or serious injury or death to myself or passengers and other vehicles on the highway should they fail and seperate from the drivetrain, driveshaft, U joint or yoke of the truck. This is a known and much complained about issue on these Ford raptors and Ford motors has ignored the drivetrain clunk issues. This should be a Ford recall to determine what the drivetrain issues are with this $60,000. Truck and correct them asap for safety reasons. Information redacted pursuant to the Freedom Of Information Act (FOIA), 5 U.S.C. 552(B)(6).

- Chino Hills, CA, USA

The vehicle has been in the Ford shop three times for a clicking or popping noise that came from the rear of the truck. I have complained about it since the vehicle reached 6,000 miles or 4 months old. The dealer has attempted numerous repair attempts (3 ea.)to fix the problem the vehicle has spent many days at the shop while the mechanic tried to fix the problem. The Ford engineers or so I have been told where aware of the issue and instructed the dealership to try the ssm# 22384 to fix the issue. The dealership performed the ssm# on Friday the 14th of Dec and after driving the truck I noticed the same complaint of the clicking noise and there was no apparent change to or after bringing the truck in for repair. I notified the dealership and they said the truck was safe to drive and they would keep me notified on any other fixes as they come available through Ford.after almost 200 miles after the attempted repair I was driving down the highway when I felt the truck shake then heard a large pow then bang, I quickly looked out the rear view mirror and saw smoke and sparks. I was able to recover and get the vehicle to the shoulder of the road where I noticed the driveshaft on the ground the only thing attached was the front of the drive shaft. The pinion bearing flange (rear) was attached to the driveshaft and the pinion shaft was sheared off the rearend. I feel this problem could have caused a serious injury to me or others if I was in a different scenario and not so lucky to not be carry my children and towing my boat. This is a unsafe condition and should be dealt with to ensure others don't have my incident that could create a accident. I have the service record copies and my truck is still at the dealership waiting on parts.

- Waldorf, MD, USA

I was driving to work entering the freeway doing 55 I tried to accelerate the vehicle past a slower moving car and the vehicle began to shake violently and the truck lost power. Had I been in heavy traffic this would have certainly caused a serious collision as I was unable to control the vehicle and had to slow down to 30 mph on the freeway before I could slowly accelerate back up to speed. This has occurred multiple times since October especially after rain or even in the mornings when it has been a heavy frost overnight. Also my M.P.G is down to 11 to 13 M.P.G this is horrible especially this day and age in vehicle technology. I have brought my truck to the local dealer and of course they stated they were unaware of a problem. I had to show them multiple complaints from this website and off the Ford 150 forum. It has been 6 weeks and the part still is not in for my vehicle.

- Chardon , OH, USA

Traveled from benton, la to little rock ar. Was driving down two lane highway at 55 mph in the rain. Had to come to stop as a vehicle was turning left. Upon accelerating vehicle began to shake violently and would not accelerate past 15 mph. Was able to pull over to shoulder. Turned off vehicle and removed key. Restarted engine. Vehicle would only run approximately 20 mph. Drove to next town about 10 miles away. Stopped at gas station for approximately an hour. Since it was late in the evening we had to continue traveling. Truck then would run about 70 mph down the interstate, but any acceleration would cause the truck to hesitate, shake, and loose power. Only extremely easy acceleration would work. No down shifting possible. Truck was diagnosed at chenal Ford in little rock ar. Found to have water in the engine from entering the turbo charger air intake. Water apparently accumulates in the turbo charger in the rain. If hard acceleration occurs during the rain, water is pulled to the engine damaging the spark plugs and coil packs. This is a known issue with Ford as the have several service bulletins out. Unfortunately, the dealer in Louisiana has not been provided a correction from Ford. My understanding is that the turbo intake system has been redesigned for the 2013 model year. Ford at this time is not offering to replace the air intake. As such, I this vehicle is not safe in the rain. A car should not stall when accelerating.

- Benton, LA, USA

While attempting to merge into traffic pulling a trailer I pushed the gas pedal and the truck down shifted but would not accelerate. The truck will drop into 3rd gear and will not exceed 4000 RPM. This has occurred several times and has been in the shop 3 or 4 times. It has also happened without a trailer. On several occasions I have had to pull over and turn the truck off to get it to go. Sometimes I can just come off the pedal and press it again to correct. This is a dangerous issue that could cause an accident. The dealer has reprogrammed the truck several times and replaced the converters twice. I have asked Ford to buy back the truck but they have not responded yet. The truck is going back into the shop tomorrow and I am considering utilizing the lemon law.

- Forest Hill, LA, USA

There are thousands of reports of this all across the country on the net. It is commonly referred to as a "transmission bump". the problem is, when coming to a stop, the transmission down shifts & causes a bump, or a push. The first time it happened to me, I thought someone rear ended me! it can also happen while you're at a dead stop. The truck actually lurches forward. I was told that this is "normal" for the 6 spd. Transmission in my Ford. No tsb has been announced from Ford to fix this!!!

- Ft. Worth, TX, USA

2012 F150 ecoboost. Was cruising on the highway at 60-65 closing in on a slower moving bus. Pulled out to pass and gave it more throttle the vehicle did not accelerate even with throttle to the floor. Had to hit the brakes and pull back behind the bus to avoid a collision. After recovering the motor seemed to recover and allowed for acceleration again. This was the second time this has happened to us. Neither time did the computer register a fault code or check engine light. The first time we took it for the issue, Ford service could not do anything as no code was found and unable to recreate in test drive. At that time tsb 12-6-4 was out pertaining to this issue. After the second time, again there was no code or recreation but a new tsb 12-10-19 superseded the previous tsb and allowed for repairs. This is a dangerous condition that Ford is aware of and could possibly affect all 2011-2012 F150 ecoboost motors and some early 2013 models. The charge air cooler as originally designed is creating condensation that causes these power loss events. The corrective actions in tsb 12-10-19, if successful, should be applied to all F150 ecoboost vehicles built with the older intercooler design.

- Glendive, MT, USA

The contact owns a 2012 Ford F-150. The contact stated that while driving 55 mph and attempting to accelerate, the vehicle decelerated without warning. The vehicle was taken to the dealer who upgraded the transmission software. The manufacturer was not made aware of the failure. The vehicle was not repaired. The failure mileage was 2000 and the current mileage was 5,000.

- Redmond , OR, USA

Purchased truck new April 2012. While driving on the interstate I tried to accelerate past a slower vehicle. The truck would hardly run, lost power and speed. This is a known problem with Ford ecoboost engine. Unfortunately I did not do my "homework" on this engine package. Many complaints of this problem can be found on the internet. Ford Motor Co. Knows and admits that there is a problem with condensation build up in the intake tract of this engine. It has been aproblem from introduction. They still have not found a "fix" for this defect. So far this truck has been to the dealer 2 times for this problem and nothing has worked. This truck is dangerous to myself and my family. If it is raining while driving, it will hardly run. It is unsafe to own or operate.

- Foley, AL, USA

The contact owns a 2012 Ford F-150. While driving approximately 60 mph with the cruise control activated, the pedal was released and the transmission abruptly down shifted three gears. The contact was able to continue driving after waiting ten seconds. The vehicle was taken to an authorized dealer who advised the contact that the vehicle was functioning as designed. The manufacturer was notified of the problem. The approximate failure mileage was 1,000. Updated 9/25/12 updated 10/03/2012

- Belvidere, IL, USA