6th time this misfire has occurred. Husband stated he thought it was bad gas initially. Anytime under load it would misfire, lose power, and this time I was traveling on Interstate 75 and was 6 hours away from home when it happened. Truck started shaking violently. I got into emergency lane, put on 4 way hazard flashers and pulled over when safe. Check engine light flashed initially then stayed on. Checked for lost fluids -none. Watched temperature and pressure gauges. Eased truck home. Then dealer says they never heard of this problem before (!!! how?)

First two of multiple occurrences happened on same trip from NH to VA; shuddering/loss of power in rain while attempting to enter left lane of Interstate from median-located service areas. After the second time, gently limped truck to Upper Marlboro Ford in MD, they replaced ignition coils for cylinders 5 and 6 (codes P0305,0306) with two used ones from their repair stock. As I was over 450 miles from home with 200 miles to go I paid the diagnostic fee of $104.95. Dealer claimed that ignition coils are not covered under drivetrain warranty, and bumper-to-bumper warranty had expired. They did not mention EIGHT different Ford TSBs for this exact problem and I didn't know about them at that time. But how are coils NOT part of the drivetrain?

In my later research I found EIGHT NHTSA investigations for this exact problem, all closed when Ford issued TSBs for each. Apparently NHTSA is as effective on vehicle dangers as FCC is regarding the Do Not Call List.

Chronological followup (3rd instance) in next complaint.

Third total occurrence of same problem, first two were on 2/24/17. After reviewing multiple reports of others with the same problem, I had all six ignition coils replaced at a local shop (non-OEM parts) on 11/17/17, 40,953 miles. Next long trip, 1/1/18, same problem while returning from VA to NH. Had the DTC read as P0301 (#1 cylinder misfire) and went to my local Ford dealer, bringing a copy of Ford TSB 12-10-19. This identifies the root cause as the Charge Air Cooler/CAC when it accumulates water and feeds it to the turbos and cylinders under load.

Service adviser ignored the TSB when I gave him a copy and told me "these trucks just eat coils and spark plugs". Not a satisfactory answer! I was also charged $119.60 diagnostic fee and no repair was authorized as I was not paying again for correction of a known drivetrain problem that should be covered under the drivetrain warranty. Bumper-to-bumper warranty already expired as I purchased this 2012 truck new on 7/19/13.

I still have the six original factory coils (two allegedly bad as of 2/24/17) as well as the two Ford coil replacements which were installed 2/24/17 after previous incident. Might need them as evidence. I opened a NHTSA complaint today, but since they have opened and closed EIGHT investigations of this same problem I'm not hopeful. I also opened a case with Ford customer service and I'm not optimistic there either - they say that can't force dealers to perform TSBs, especially under warranty. I can't trust this vehicle...maybe it's time for a Toyota!

In Pennsylvania, coming out of a rest stop on the Turnpike I attempted to merge into traffic. I accelerated quickly and experienced a hard misfire. I lost all power, the check engine light started blinking and the engine started shaking. I needed to pull onto the should of the road to avoid a collision with a large truck. I shut the engine down for a brief period and restarted it. The engine seemed to run normal, but the check engine light remained on.

I completed my journey and brought the truck to a Ford dealer only to pay over $500.00 for plugs and wires, (rip off). Approximately, one year later, the check engine came back on. My local for dealer told me that the hard misfire caused raw gas to travel through my exhaust system and now the Cat converters needed to be replaced. This was covered with the extended warranty I bought when I purchased the truck. I guess I'll try GM next, if I wanted these problems, I would have bought a Dodge.

Like many others, truck has been great (my 4th F-150) with no problems until last week. Attempting to merge in medium traffic on a rainy day EcoBoost engine lost power and had to bail out on to the shoulder to avoid a collision.

Test the next day (in the rain) and same thing with the engine light coming on. Drove it to the dealership. The are aware of the problem and have a service bulletin covering the issue. They want over $500 to install a newly designed part to fix the issue. Ford says no help foe the repair cost even though they no it's a design problem. The truck has 71000 miles but it has a design flaw, nothing I did nothing wrong as the owner. This is a design issue and I have filled a compliant with the NHTSA.

Engine bogging down upon acceleration has happened once again. I would rate today's experience as one of the worst I've had. I was driving in dry conditions, traveling mostly city speeds for about 20 minutes and then the last 5 minutes highway speeds before having to stop at an on-ramp to an interstate and wait at a metered light. After about a 2 minute wait it was my turn to accelerate up ramp and merge with interstate traffic. After a hard acceleration for several seconds the engine surged and completely bogged down. I tried to accelerate but nothing happened, had to quickly pull over to the shoulder and shift to neutral. After a few seconds I returned the engine to drive and it returned to normal operation. I continued for another 15 minutes at highway speeds with nor further problems. I continue to be very frustrated with this issue and know the dealer will be unable to replicate it ... I'm close to turning in this almost 4 year vehicle and not very happy with Ford.

1. March 17, 2014 with 24,991 miles: Taken to dealer for hesitation and misfire like symptoms when accelerating while driving in town and on the highway. I had not experienced this when towing my 8000lb travel trailer the prior summer (2013) but had experienced this in January and March 2014 when towing the 2500lb Boy Scout trailer. No check engine light. Dealer reported no problem found, no codes and made no repairs.

   2. Jun 19, 2014 with 29,440 miles: Taken to dealer for hesitation and misfire like symptoms when accelerating and going up and down hills. I specifically noted in when in 4,5, 6 gear during both flat and inclined highway driving. This was experienced during a 2 week trip from Fort Collins to the Grand Canyon and back while pulling an 8000lb. travel trailer. No check engine light. Dealer found misfire in #1 & #4 and replaced the coils and plugs in #1 & #4 only. Test drive still showed misfire, then they replaced the turbo boost pressure sensor. I was told then that moisture had damaged the plugs and sensor.

   3. February 23, 2015 with 35,214 miles: Taken to dealer for hesitation and misfire like symptoms when taking off from a stop, during normal acceleration and going up hills. I had just towed the a 2500lb. trailer up to the mountains on Jan 30-Feb 1. I had felt minor misfires prior to Jan 30 but became significant and frequent afterwards. No check engine light. Dealer replaced the driver’s side exhaust manifold because it was found to be warped. I asked how this could occur (assuming something triggered high temperatures in the exhaust) but the dealer could not give me an answer. I felt some minor misfire driving around town and heavier when I towed the 2500lb. trailer 2 weeks later. I asked specifically about plugs and coils and was told they were ok.

   4. May 4, 2015 with 37,164 miles: Taken to dealer for hesitation and misfire when taking off from a stop, during normal acceleration and going up hills. I saw this in acceleration conditions from 10-60mph without towing a trailer. No check engine light. Dealer reported no problem found, no codes and made no repairs. I expressed my concerns that I am experiencing this and have a 2 week trip coming up towing the 8000lb travel trailer but got no interest in going further in fixing the issue from the dealer. I asked specifically about plugs and coils and was told they were ok.

   5. June 2, 2015 with 38,577 miles: I had periodic misfires but no drop in speed or power when traveling from Fort Collins, Co to Twin Falls, Idaho. When leaving Twin Falls, Idaho to go to Lake Cascade, Idaho, I had major repeated severe misfires 3 miles after entering I-84 while going up a moderate incline. The check engine light came on (first time this ever happened) and I had a reduction in power, could not get out of 3rd gear and my speed dropped from 65mph to 50mph. I exited the highway (check engine light went off) and drove to dealership in Twin Falls. They checked the codes, showed me TSB14-0180 and replaced all 6 spark plugs and boots (not coils) at my cost 0f $297 (no warranty approved). I had one misfire when entering the onramp for I-84 but then went all the way to Boise, ID without a misfire. I then had some minor and moderate misfires during major inclines while towing the trailer but no check engine light. Both before and after the plugs were replaced, I had noticed a 2-3 mpg drop in fuel economy and the exhaust exhibited a larger than normal amount of white smoke and odor on key on.

   6. June 5, 2015: Drove the truck into a mountain area without the trailer and experienced minor and moderate misfires with no check engine light on. This was my assessment for whether to continue on our 2 week trip or not. I then went to the Ford dealer in Cascade, ID who could not work on it for another week. He told me that I should head back to Twin falls or home with it whether the check engine light came on or not. He did not think it would completely break down. Called Ford customer service to file a report and ask for help.

   7. June 6-8, 2015: Drove from Lake Cascade, ID to Fort Collins, CO while towing the 8000lb. travel trailer. Truck would experience series of moderate to severe misfires in waves – be ok for an hour and then go into a series of misfires for 3-10 minutes. Some were on hills, some were on flat highway driving. I had 5 occurrences where the check engine light came on during this drive. 3 of these occasions were during a hill climb where I had a power reduction and lost speed. I observed that during these instances the vehicle stayed in 3rd gear. When I would get a series of severe misfires, I would either let off the gas pedal or increase the pressure on the gas pedal to try and get it out of the misfire. On the last day of the trip (June 8), I experienced misfires so severe (and without the check engine light coming on), that I could hear and feel the turbo kick off (whoosh sound) and then kick back on after a few seconds.

   8. June 9, 2015: vehicle was taken to dealer in Fort Collins where I discussed the issue with the Parts & Service Director. They were informed that I had to turn back on my family’s 2 week vacation and that I was extremely unhappy with their inability to properly diagnose and fix the issue. I also gave them a copy of a related NHTSA investigation response from Ford which cites that the issue was fixed and there were several TSB’s related to this. (This was from my internet search the night before.) I told service director that I did not understand why I have to do the homework and research to solve the issue that they should have access to TSB’s related to this and fix it right the first time. They did not document that they looked in OASIS on the prior 2 visits (Feb 23, 2015 & May 4, 2015) for service bulletins.

   9. June 12, 2015: Told vehicle was repaired per the TSB but dealer would not provide the TSB. I was told that the pigtail wire on the turbo boost pressure sensor was replaced and rewired and no other work (hardware or software) was implemented beyond troubleshooting. I was told from engineer at Ford Dearborn that the hardware and software needed to be updated but dealer said that was not required and not done. I verified with the dealer General Manager and the service adviser that the software was never updated. I had left a message on June 10 and June 11 with Ford customer service (Jessica) requesting help to get a Ford field service engineer out and got no response. I took the vehicle home on Friday with no confidence that the vehicle would not have a repeat of this issue as the root cause of the repeatedly occurring misfire was not addressed and would show up again in a few months.

   10. June 13-25: Ford customer service will not return calls even though I submitted the bill I had received and asked for reimbursement.

   11. I traded vehicle in as I could not trust it again. I would NOT recommend buying a Ford again after this experience. The misfire issue on the 3.5L Ecoboost is a known issue and Ford refuses to stand by their vehicle and take care of their customers. The dealer does not appear to get clear instructions from Ford technical support.

Under hard acceleration the truck violently misfires and pops like it's severely missing! Took it in to find out that it Definitely needs to be fixed but isn't covered under the 60,000 power train warranty. I said if it's not covered it must not hurt the engine so I'm not going to fix it but was told that it definitely needs to be fixed. What they think the problem is the inter-cooler works too good and causes condensation to get into the engine so it needs to be shielded.

Of course I have to pay for this fix and they can't guarantee this to be the problem. I understand the issue is a manufacturer deal and not my dealers fault...I will say the service manager has gone out of his way to make this right...just wish Ford would.