Nautilus 2.7 Has Woken Up!!!!

[jbrumley1]

Better than expected results.  2020-year model ... 26K miles with Livernois 93 octane tune, NGK colder plugs.  Very noticeable difference from stock. 

 

Ironically, I sprayed a can of CRC Intake Valve and Turbo Cleaner through the intake.  It threw three SES codes.   So, I sprayed CRC MAF Cleaner on the IAT sensor, which looked a 'little' dirty.  Kept looking for the MAF, however, no luck finding it.  Come to find out, the IAT and MAF sensors are one-in-the-same.   The sensor performs both functions, which I thought was very unusual.

 

After cleaning the afore-mentioned sensor, I cleared the codes with the Livernois tuner and the engine woke up in a very big way.  With only 26K on the vehicle (2.7 Gen 1), thought there would be hardly any carbon buildup.  I was wrong.   Very impressed after spraying the CRC cleaner through the intake and the MAF cleaner across the IAT/MAF sensor wires.   

 

The lack of port injectors must really cause a LOT of carbon buildup on the Gen 1 Ecoboost engines.  This thing is a different animal now.

 

[1004ron]

28 minutes ago, jbrumley1 said:

 Come to find out, the IAT and MAF sensors are one-in-the-same.   The sensor performs both functions, which I thought was very unusual.

I believe your assumptions are incorrect.

 

The IAT isn't sensitive to fouling.

 

These days an MAP has taken the place of the MAF - the MAP is way less sensitive to fouling compared to the MAF and its very rare that it requires cleaning.

 

My 2017 2.7L has 123K miles on it and its never needed carbon removal.

 

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Edited Wednesday at 11:51 PM by 1004ron

[jbrumley1]

On 2/11/2026 at 6:48 PM, 1004ron said:

I believe your assumptions are incorrect.

 

The IAT isn't sensitive to fouling.

 

These days an MAP has taken the place of the MAF - the MAP is way less sensitive to fouling compared to the MAF and its very rare that it requires cleaning.

 

My 2017 2.7L has 123K miles on it and its never needed carbon removal.  The included picture is what my 2020 Nautilus is equipped with.

 

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1004ron - thank you for your response.  As for the map sensors, I can confirm the AI search below having 2 map sensors is correct.  I located both of them on my engine by their FoMoCo part numbers.  

 

As for the integrated IAT/MAF sensor performing different functions within the same assembly, I respectively believe my original post is correct.  See attached picture ... just disregard the CRC cleaner I sprayed on my hand.  I'm too old to get cancer from it before I bite the farm...  lol!

 

'The Intake Air Temperature (IAT) sensor and Mass Air Flow (MAF) sensor are not the same component but are commonly integrated into a single assembly on many modern vehicles, particularly Fords (like the DS7A-12A697-AA part). The MAF measures the amount of air, while the IAT measures the temperature.'

 

 

it ...  lol! before I eat the farm

 

 

 

 

 

 

Edited 19 hours ago by jbrumley1
Add missing spaces

[1004ron]

I have to date never seen a combination IAT/MAF device - they may exist but guess they're scarce - I wouldn't rely on AI for this type of thing.

 

The device in your image is an IAT and even if it gets a little dust and dirt on it, it would function without an issue.

[dabangsta]

9 hours ago, 1004ron said:

I have to date never seen a combination IAT/MAF device - they may exist but guess they're scarce - I wouldn't rely on AI for this type of thing.

 

The device in your image is an IAT and even if it gets a little dust and dirt on it, it would function without an issue.

It was very common on mid 2000 to 2010 legacy cars, my 2000 Grand Marquis had a MAF and an IAT separate, but 2003 it was IAT attached to the MAF sensor module.

But on a vehicle without a MAF? Or anything not legacy?

[jbrumley1]

Appreciate both responses, for sure.  Had a built 1999 Trans Am which had a separate IAT and MAF sensor.  It was a low 11-second NA car with zero weight reduction.  Parted it out 18 years ago and I miss it from time-to-time.

 

As for AI searches, I'm a retired Bank of New York Network Engineer and have found many AI searches are generalized and often inaccurate, as 1004ron stated.  I've worked with data scientists and AI Engineers for the last few years before I recently retired.  You have to manipulate the open code to do a true deep dive search of reputable Ford supported auto parts depots. You have to REM out all the forums, Meta pages, etc. Browsers just generalize from commonly pooled data and are not much good. 

 

First went to my Lincoln dealership to validate the part ... before I went to other major parts dealers.  The picture dabangsta posted, above, is what I was looking for.   My 2020 Nautilus 2.7 does not have a MAF like that.  It has the IAT/MAF I posted, above.  The MAF SES code thrown was P0101 until I cleaned it. It would not clear until it was cleaned.  To me, this somewhat validated it serves the function of a MAF, which 1004ron stated, 'The IAT isn't sensitive to fouling.'.

 

For the sake of agreeing to disagree, doesn't matter much what anyone calls it - or what function it serves - I still have 2 MAP sensors and that THING.   LOL!!

 

Thanks again for responding, fellows.  It really is appreciated.

 

 

Edited 1 hour ago by jbrumley1
Accidentally hit enter before finished, so, had to go in to edit mode to continue