I just cleaned the MAF and MAP sensors on my 2016 2.7 Ecoboost. The two MAF sensors (1 by intake air filter, one near water pump) were mostly clean, and the sensors had a nice blue color. The MAP sensor (middle top of engine) seemed reasonably clean, but the center sensor (inside the little cage) was black and looked like it had carbon deposits that wouldn't clean off. I can't be sure because it's tiny and my vision isn't that precise. I've had no engine codes or obvious problems.

I wonder whether the OEM MAP sensor (inside the little cage) is supposed to be black, or might that indicate it should be replaced soon?

Thanks!

 

Maybe it's supposed to be black. This one in rock auto is a blue green color. Could be different color from different manufacturer though.

 

I just cleaned my three sensors the other day, but mine is a 2016 3.5 Ecoboost so the color of yours might be different. I do remember the one towards the back of the engine was greenish/blue just like the picture of the Rock Auto one. I remember it being that color because it was completely covered and looked black at first. After a short spray, then letting it dry, then spraying again it finally became nice and clean. Had to do it three times. Whatever you do not touch the sensor or try to pick anything off the sensor, you will destroy it. I would also recommend not spraying the sensor up real close with the spray can. I kept the spray pressure from the can as light as possible

Greg
2016 Crew, Lariat, 3.5EB, Max Tow

 

The Sensor in the cage is for intake air temperature sensing and physical protection.
That is how they look with a coating on them.
The other part of the Sensor measures intake vacuum and Turbo pressure under Boost at the cross over. point between vacuum and pressure.
The 5L are equipped the same but without Boost pressure sensing.
The MAP-T is connected to the fuel pressure control system to add or reduce fuel as needed by the program and power level requested by the driver.
In this equipage, Mass Air control is not used in truck applications.
If you look at a photo of this sensor, you see 4 terminals. One pair for MAP and one pair for Temperature.
The Turbos heat the air hence the cooler but air temps still rise and has to be accounted for.
The signals go to different places in the PCM system.

 

The Rock auto photo is the MAP sensor, NOT the IAT (incoming air temp sensor). They both can't be together, the MAP sensor is mounted to the intake manifold, the IAT is located in the air box/intake tube.

 

I think you better do more checking research of this part for the OP engine.
There are 4 terminals you see in the photo. I explained why.
The two type sensors absolutely can be combined in the same housing same as it is on >your> 5L.
And is why your 5 L Ox Sensors are 5 lead and do direct A/F ratio calculations and report it right to the fuel pressure regulator circuit as part of the MAP-T circuit to control fuel much faster and more accurate.
There might be an IAT in some other location and system designs but that is not what we have here.
The old 5L push rod engines and 4.6/5.4 had them but also had Mass Air control.
The newer 5 L trucks do not have an IAT anywhere else but in the back of the intake manifold combined with the MAP. There is no need for two temp sensors in the same flow path.
As far back as the first 1985 5L F150 truck engines were MAP sensor controlled but did have an IAT but was 34 years ago and up into the 1990s even on the Lincoln cars.
I know there is very little info presently on this, but the MAP-T is how it's done. It is most important for the PCM to know the final intake air temperature at that point and not just in the intake tube ahead of the compressors that puts heat into the airflow, or an air cooler would not be needed.
Manifold temp has to be part of the control system, or the engine can go into detonation and destruct if ignition timing is not pulled back. Again, that's why there is an air cooler between the turbos and the intake manifold to reduce this possibility and preserve the power the turbos are supposed to make from Boost.
Many vendors don't say anything about this being combined with T sensing likely because the functions can't be separated with only one part involved.

 

Maybe it's supposed to be black, but even if so I don't think I was able to clean it well. I'll be towing a bit in the near future, so I ordered a new one from Rock Auto. It's only a $25.00 part (with shipping) and a quick and easy task to replace it, so nothing is lost if it makes no difference in performance. We'll see . . . .

Thanks, everyone.

 

One more time: The MAP sensor is mounted on the intake manifold, and it's purpose is to measure intake manifold vaccum (and pressure with boost. The IAT sensor is mounted on the air/box intake tube, and it's purpose is to measure the air temp coming into the engine. Please explain how both of these functions can be mounted on the intake manifold, or both of these functions be mounted on the air/box intake tube?

 

My bad! I did find a Map sensor with pressure, and temp sensors:

 

No problem.
There are things about these late designs that are still being compared to older systems by assumption.
.
For example, the Ox sensors are no longer the same design as the older vehicles and much more expensive.
Engineering keeps upgrading so much that even the dealer techs can't or are not allowed to get deeper into diagnostics from instruction by the dept head trying to make things go faster and at higher profit, at the expense of the customer.
.
Another example is the reported tendency to steering pull to the left.
I had that tendency and observed over time what affected this tendency.
My decision was not to take it to a dealer only to be told the alignment is in >spec and come away dissatisfied.
I went to a local high-end shop, talked it over with the owner, what I see and want to be done.
Put the truck on the rack, printed the result before a change in alignment and what can be done.
He did the change for me and turned out perfect and still in spec.
The alignment is very sensitive.
This is why I did not go to a dealer for alignment changes I wanted made.
It was out of my pocket but obtained the results I thought was attainable.
Even found a rear fault that would be costly to correct but let it go as it was not causing any observable issue with tire wear and still in spec.
Another example is, the Cylinder Head Temperature sensor located on the rear of the 5L passenger side head is mounted in a 'blind' hole and is a two level sensor with three leads. It never touches coolant.
Good luck.