robotpepper

All your symptoms sound the exact same as my '11 EB. I bought it at 100k (60,000 miles) and shortly afterwards began having the inevitable 'misfire' issue. Luckily had an extended warranty on it and had it at the dealer repeatedly - they did many things like the recall/service bulletins, reflashed the ECU, replaced cat/O2 sensors, reflashed ECU again, nothing seemed to work. Finally after much research online I bought spark plugs/boots for a '13/14 and replaced them myself and the problem never recurred - I had useable power again! Sometime later I also began having a strange noise on startup. Was like a loud 'whirring' noise - it sounded like a loud hair dryer for 60-90 seconds after startup before it went away. Several weeks ago I was cruising into work early in the a.m. on the highway and heard a loud 'grinding' noise. Got into work and parked the truck and hit the forums again - everyone suggested an issue with the integrated wheel end (IWE) causing the 4x4 to begin to engage due to loss of vacuum. I took the truck into the dealer and told them about the highway grinding and 'whirring' noise on startup. They diagnosed a faulty brake vacuum pump right away as the noise upon startup, replaced it under extended warranty, and then weren't able to recreate the grinding noise on the highway - and neither have I, since it was replaced. I've heard the pumps can be somewhat pricey so see if you can find a walkthrough online and find one at a junkyard? Good luck!

vscott

Thanks for giving me a starting point for the noise - At first I thought it might be the AC compressor but it still makes the noise with the AC off. Also don't think it's the transmission as it makes the noise in park. I was thinking maybe power steering rack as sometimes the noise varies when i move the steering from side to side without the truck moving. I was figuring I'd have to record the noise and play it back to the service manager because it only seems to do it after the truck sits for several hours and it only lasts a minute or so. It is definitely coming from the engine compartment as I can hear it with the hood up but it is hard to isolate. I was also thinking maybe a belt tensioner but it doesn't have the high pitched sound of a bearing. With all the Ecoboost plumbing in there it is hard to even see the drive belt. At any rate, I'm really getting the itch to unload this before it gets expensive. There just isn't much to pick from at the dealers around here yet and what is there the sticker price scares me although I know what I'll pay will be much less.

Scott

thiggins

The air conditioner compressor clutch is still spinning with the AC off, it's just not engaged. The bearings in those do go bad and cause very nasty noises. They can also seize up and strand you someplace. This happened recently to a friend of mine. It burned the belt into pieces.

vscott

I don't think it's the AC- it doesn't sound like a bearing . I think the vacuum pump might be the most likely cause as it goes away after a minute. At any rate, I'm looking to trade it in before it fails. I'm going to get a V-8 this time -less things to go wrong.

InDaRed2

Just got back from a 1500 mile round trip with my 2011 ecoboost. On the way down I had it stumble a few times in heavy fog. On the way back it stumbled bad taking off from a stop light and i had to barely touch the throttle and let it clear up and it finally quit. It never through a code or went into full limp mode. It did run rough for periods of time when on cruise where it felt like a bad vibration.

Did spark plugs probably 10-15k miles ago. Going to check them tomorrow for cracks etc and look at the boots.

Has anybody has any luck with these issues after warranty is out? I have about 83k on the clock right now.

barronj

Happened to me a little over a week back. 2013 Ecoboost KR SCREW, I was overtaking a blue hair in a caddy on a small two lane road, it hit 3rd gear and the shudder happened, then the loss of power. A little wrench showed up on the cluster, but no CEL. I pulled over, turned the truck off, plugged in my scanner, cleared codes, P012B & P012D, started the truck, wrench gone, power was back.


It was a clear day in a humid environment (very close to the Texas coast).

FirstFtruck

After several trips to the dealership over a couple of years for shudder and loss of power resulting in the CEL coming on and applying a couple of TSB's to fix the issue (reflash, change to intercooler), on the last trip they changed the spark plugs and boots, there was obvious carbon tracking on the side of a couple of plugs, that was about 6 months ago, haven't had an issue since and the truck with 77K on it runs like the day it was new.

The love affair is back on.

FordService

Hi InDaRed2,

Were you able to find anything when you inspected your truck? If you decide to get your dealership involved, I'll be able to check out some options to assist. Keep me in the loop.

Was this an isolated incident or has it happened again, barronj? I recommend making an appointment at your dealership so they can look things over. How many miles are on your truck currently?

Crystal

timtoolman

I believe the AC has a seperate belt from the main engine belt,'if this happened just cut the belt and still drive with no drive ability issues until it got fixed

barronj

It was the first time it happened, has not happened since (only 1000 miles later though). 55K miles on the truck.