2011 Ford F-150: shudder or vibration when accelerating

Filed Jul 5, 2020 · Engine, Transmission · OK

Power train auto transmission controls module reset has already been done to car. When accelerating from 50-75 the transmission shudders and jumps. When you go up hill it's impossible to accelerate at all without the transmission shuddering. Engine light blinks occasionally.

Filed May 11, 2020 · Electrical, Engine · 105,000 miles · KY

I purchased my 2011 f150 ecoboost in used condition in 2014. The primary use for my truck is around town errands and hauling light loads. For sometime now I have had issues, like many others have complained as well, during acceleration at 45+MPH the engine loses it's power, shudders and stalls. Once there is a reduction in the amount of throttle, it takes a few minutes to regain "normal" driving conditions. For example, my family and I were coming home from florida on the parkway, in july and with no abnormal weather conditions, and as I was ascending a grade about 75 miles per hour and a semi truck behind me, I gave the truck more throttle and it began to shudder violently, a subtle backfire, and lost power and could not regain throttle response. I quickly moved the truck into the emergency lane and had let the truck return to a normal idle, took a few minutes, before almost getting into a serious collision with the semi-truck. Over the past years I have just dealt with the issue and have taken it to mechanics and scanned the truck with no error codes or issues, until just recently. The mechanic scanned it and it showed misfires on #4 and #6. He replaced the coil and plug hoping that would be the cure, but with no luck it did not solve the issue. I'm reluctant to drop another $250.00 to replace the rest of the coils, but I don't know what else to do. I do not have disposable income and the truck is paid for, I and can't afford to get another vehicle. I enjoy my f150 and plan on keeping it until the wheels fall off. I have read post after post and video's that there are many people experiencing the same issues, but it seems no one is willing to step forward and make the complaint. I want this issue addressed and I hope ford will resolve the issue before someone is seriously injured or a life is taken over this problem.

Filed Mar 5, 2020 · Engine, Fuel system · 99,540 miles · GA

Upon hard acceleration, while trying to pass a vehicle, the vehicle shudders, shakes and stalls. The MPH goes down and down even if pressing the gas pedal. I must pull over, put the truck in park and turn off the truck. Avoiding a head on collision is difficult when this happens. After restarting the truck, the engine light then comes on. This has happened on four different occasions. The gas mileage is now inaccurate and it appears that the "miles to empty" does not match the miles driven. Rivertown ford (columbus, ga) claims to have no knowledge of this type of situation. Spark plugs & boots were said to be the cause the first time on 6/2/18. The 2nd time 12/12/18, the "intercooler shield was installed & PCM reprogrammed" -- I was promised this was the 100% fix. As of 2/28/20, rivertown advises their fix is out of warranty and now requires $650 for "engine tear down required to determine point of failure".

Filed Jun 14, 2019 · Transmission · 171,600 miles · AZ

Tl* the contact owns a 2011 ford f-150. The contact stated that the vehicle downshifted in the middle of traffic, decelerated and lost power. When the contact applied more pressure to the accelerator pedal, the engine shuddered and the vehicle hesitated violently. Also, the check engine and multiple unknown warning indicators illuminated. Afterwards, the vehicle returned to normal; however, the failure recurred the next time the vehicle was driven. The vehicle was taken to rodeo ford (13680 w test dr, goodyear, az 85338) where it was diagnosed that the computer needed to be reprogrammed. The vehicle was repaired, but the failure recurred. The contact took the vehicle back to the dealer and was informed to drive the vehicle two hundred miles. The contact complied and the transmission failed again. The vehicle was taken back to the dealer a third time where it was determined that a tune up was needed. The contact performed the tune up himself and the vehicle failed again. The manufacturer was made aware of the failures and did not assist. The failure mileage was 171,600.

Filed Feb 7, 2019 · Acceleration, Engine · 69,000 miles · AL

Truck will have severe intermittent stumble/misfiring on acceleration from 45mph+ in humid, wet or damp conditions. The vehicle shudders violently, bogs down, and check engine light flashes eventually becoming a solid engine light. This involves the engine shuddering when there is acceleration at highway speeds; this is very dangerous when trying to pass vehicles at highway speeds. Have my spark plugs and coils replaced after the following happened in damp and wet weather conditions. Make years seem to involve 2011-14 ecoboost trucks. From thousands of ford forum posts, the trucks have an intercooler condensation problem that is causing poor performance and spark plugs/coils to fail early. Water and oil vapor/residue condensation is being sucked into the engine. People have had to take it upon themselves to find a solution by drilling a 1/16' hole in the low point of the intercooler driver's side to drain oil/water condensation/residue or install a $400-$500 oil catch can separator which ford should be offering to owners with this problem. Ford should own this problem and issue an appropriate fix like the oil catch can installation or confirm with its owners that it is ok to drill a weep hole in the intercooler. Not the cheap fixes I have seen like tsb 13-8-1.

Filed Sep 5, 2018 · Driver assistance, Steering · 100,000 miles · NY

I was turning my 2011 f150 around in a lot when a steering error warning poped up on dash along with a stability control error. Steering froze and I did not have steering control. Took all effort to force vehicle to turn and avoid a collision steering was extremely hard to turn with a loud buzzing noise and limited turning range (about 2/3 of normal range left and right. Drove home this way (about 15 miles). Was extremely difficult to control vehicle and very nerve racking. Being a mechanic I scanned codes and it appears that the electronic steering gear failed. This is a very dangerous system I shudder when I think of the consequences had I been driving at highway speed. If there is not a recall for this issue there should be before someone is killed. I included the scanned codes below.

Filed Jun 6, 2018 · Transmission · 79,000 miles · VA

Sudden downshift from higher gear to 1st gear while driving. This has happened twice in the last week. Both times the vehicle was already in motion in a straight line. The first time it was in 3rd gear and downshifted into 1st at about 30 MPH while trying to accelerate. The second time it was in 5th gear going downhill and the transmission shuddered then dropped into 1st gear at about 40mph. Both times the engine RPM spiked and it was necessary to immediately pull over out of traffic until the transmission reset itself.

Filed Dec 10, 2017 · Transmission · 93,000 miles · TN

The federal safety agency campaign #16v248000 .... While driving on the highway, the transmission abruptly downshifts. The rpms will then begin fluctuating up and down causing the vehicle to shudder and lurch. The transmission then begins to slip around. The indicator shows it bouncing from 2 to 6 to 1. I took it to a shop and they hooked it up to check the sensors and it came back that the solenoids were stuck. They reset the sensors, but the symptoms began again not more than 2 miles down the road.

Filed Nov 4, 2017 · Engine, Fuel system · 74,000 miles · MD

My v-6 ecoboost engine shudders upon accelerating, loses power, check engine light flashing on & off. This has occurred several times especially when the weather is damp. My truck only has a little over 75k

Filed Apr 4, 2017 · Transmission · 89,000 miles · CT

On 12 january 2017 when returning from a normal oil change and tire rotation at a dealership the operator heard what sounded like marbles in a coffee can coming from the transmission and the vehicle experienced erratic shifts and loss of power. These conditions were reported to and noted by the dealership's receptionist to be followed up on the next morning. On 13 january 2017 on the commute to work when accelerating from a stoplight on a city thoroughfare the vehicle downshifted abruptly from a high gear and shuddered to a halt in the middle of the roadway. The incident was so dramatic that the operator had assumed the driveshaft had been lost. The operator limped the vehicle into a nearby parking lot where the dashboard showed various warnings (see exhibit 1) and a towing company was called to transport the vehicle to the dealership. The vehicle had approximately 89,000 miles and the weather was sunny and 42 f on 13 january 2017. The dealership diagnosed the issue as an internal failure by using codes p0763, p0764, and p0979, along with removing the transmission pan which showed fine metallic shavings (see exhibit 2); the transmission was replaced by the dealership. This transmission issue was fortunate to not have resulted in any injuries or additional damages which could have easily occurred.

Filed Feb 17, 2017 · Transmission · 70,000 miles · TX

It starts shuddering, shaking and rapidly losing power while accelerating.

Filed Nov 4, 2016 · Engine, Steering · 35,000 miles · MN

The engine misfires and changes to "limp mode" after the engine shudders, shakes and looses power. This has happened twice in the life of this vehicle. Also the steering sticks when turning left.