THUNDERDOME

2013 EB. 97,000 and both turbos replaced under extended warranty. Still cant get it to idle smooth. 6 incidents with elevation and the engine light comes on. Wastegate issue I was told after a month in the shop. Anyone have issues with Ford on extended warranty work??

maplelakeduckslayer

I know this is an old thread but been dealing with mine doing this for years...Did you ever get any resolution? What you describe is my exact issue...Down low it's not holding boost at all it's just a constant hissing sound...As rpm's/gears climb the sound goes away(or at least gets quieter and can't hear it over the engine), and power starts to come on like it should...You can actually feel the truck pull like it should around 65-70 mph. Mine is bad enough it causes erratic shifts sometimes...Like it will shift way too early into a higher gears. I know we have the same exact issue and years of searching I haven't really seen anyone else describe it like you have. Mine is more pronounced in cold weather and with a tune. I'm thinking wastegate or bov issue but hoping maybe you can help shed some light on it

groeder

I have a 2016 that has an issue that sounds similar to the OP. When not fully hot, get a louder whoosing noise, then a noticeable surge when RPMs increase. When it's full hot, there is now whooshing noise and no surge, just fun power!

I have been told by Ford in very general terms that these engines use different strategies at different temps and is normal. I've asked specifically if surging is normal and I've gotten no response. Also, I never get specific answers to my specific questions, which leads me to believe they are either aware of a problem and are hiding from it or they are clueless and don't want to know.

I've posted my issue several times in several places, so I'm not going to do it again, but I'm curious to see the fixes in this thread.

kruman

I have a 2012 that I just took in for an issue that sounds identical to mapleduck and Grahamcracker. They replaced part bl3z9b325c. They couldn't tell me what was exactly the issue was to lead them to that but they ran some series of tests procedure but I decoded the paper work and from what I gather they found a leak in the system. I'm not sure if it was from the hose or the check valve in the part. Either way my issue seems to be fixed as of now. Part is 62$ on tasca website.

dcfluid

I've been dealing with this issue for years now in my 2013.
Yesterday I changed the BOV as I hoped it was a ripped diaphragm in the BOV. Cleaned & Tightened all tubes, signs of a few leaks around one turbo and the CAC.
No such luck, still the same. Reflashed to stock, reset cam, and every other thing I could.
Problem is exactly the same with 5* 87P/T tune, just magnified worse because of the extra power when it works right.
My symptoms: medium steady throttle acceleration, 1500 to 2500 rpm there is a "hesitation, lag, power loss" where you can hear the hissing BOV letting off boost. I did this while venting to Atmosphere and it confirms that the sound is coming thru the BOV system. Truck accelerates sluggish during this time unless you floor it hard.
When rpms hit 2500 everything seems to correct itself and wham! Crazy hard acceleration from then on, especially if you were squeezing the throttle down to push thru the lag period.
Steady throttle in this rev range results in surging and rpm fluctuations until it catches and goes when over 2500 rpm.
Very annoying to drive normally. Really light or really heavy throttle is better but not perfect.
No alarms or codes. Ever.
Power is terrific, tows like a beast. Always have great boost, even when problems are occurring.
Never a CAC issue. (hole drilled)
Stock or tuned it's a consistent problem.

My question : at half the price I paid for the BOV, should I try the part bl3z9b325c?
Seems likely that this is a problem that this would cause.
Anyone else have this issue and tried fixes? Win or lose?
Timing chain, wastegates, hoping this problem is not it.
It's been doing this since before 20,000 kilometres, now at 80,000. Being so new it makes me doubt timing chain. But I did hear the chain slap on start a few times in the first year of ownership, and its never returned.
Will appreciate any help, I'm not the only truck around here behaving like this.

kruman

Yes I had part bl3z9b325c replaced when I told the dealership my symptoms. I have the same exact issues you have. The part did not help the problem.

maplelakeduckslayer

Sorry you guys are dealing with this too. I did take off my bov's a couple months ago and inspected, no tears or anything.

​​​​​​I've replaced so many sensors, actuators, fuel pumps, coils, plugs etc.

I don't know what is is. I've only got 3 ideas left. One is the timing being off, I know I have timing chain issues. Two is the throttle body not operating correctly and closing when it's not supposed to. Three is a leak at the intake manifold.

I'm really not certain how much more effort I will put into fixing it as I have a ton of miles and will be looking to get a new truck in 3-4 years, but will post here if I do try something that works

dcfluid

Well thanks for narrowing down the possibilities. I doesn’t feel like there is much mechanically wrong with my truck, it sort of feels like a software / electronics issue, that just isn't quite right at certain throttle / rpm ranges.
It could be an air leak, but sort of internal bypassing leak. I've searched and double checked, sealed, tested the pressure side of the intake system.
Incorrect operating wastegate(s), electronic solenoids or controllers out of spec, software issues?
I'm also really not looking forward to finding out this is timing chain related. It's just very possible....
So here is more of a description of symptoms that may point us to the system responsible for the issue.
"When the truck shifts up, most noticeable in lower gears, 2500 rpm shifts down to just under 2000, keeping a steady throttle setting, there is a noticeable hesitation, power drop, then it catches and goes normalish until revs get to 2500 when the engine surges again to full power. The entire time you can hear the hissing BOV bypass noise(assumed BOV as it is really noticeable with a vent to atmosphere test run"
Worse when engine cold, and more so when weather colder too.
I first thought it was the computer pulling timing or fuel to protect from detonation. Perhaps it is because of a timing chain, sensor or air leak problem.
It seems like just a slow reaction to the shift and taking too long to adjust parameters.
​​​​​​Turbo boost stays strong and no drops during events that is visible on the torque app gauges. No apparent boost dumping. Almost like a lean bog, or ignition retardation.
So during this shift-hesitation event is the computer pulling timing, fuel, opening BOV or something else causing this poor response? What item would cause the computer to make this error? We've eliminated many items already with no results.
Anyone with input is welcome to throw their diagnosis into the mix. Fresh ideas needed. Ford tech knowledge of previous repairs needed.
A little venting now:
Would really like to beat this or move on back to GMC, perhaps that new 2019 will prove itself by 2020 or start looking for a slightly used truck now. I'm disappointed with all other issues popping up now that bumper to bumper warranty is over, and 1 year left on power train.
If GM had power, cab space and comfort, towing, with empty economy like this F150 I probably would already have one by now. Certainly has clouded my opinion on the wife's new SUV purchase this spring.
But just fix this one issue without a huge cost, and I will be hard to convince to change away from Ford and the ecoboost. Too many things I do like.

maplelakeduckslayer

I dunno, I was doing some messing around this weekend out at my property. Deep snow 4x4 low speed mid range rpms, you can hear boost start building and it starts dumping. I've been wondering if the throttle plate is being commanded closed when this is going on. I'm not real good at interpreting the throttle plate values in the livelink software, but I may try and do a log driving through the deep snow again and see if there is any correlation between throttle plate values and the noise appearing.

maplelakeduckslayer

Hey I missed your first post above where you state it seemed to fix the issue in may...now in December you don't think it helped? Just trying to figure out if that part helped you or not