Throttle body
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Mountain Pass
Joined: Apr 2024
Posts: 110
Likes: 6
From: Beaumont California
Throttle body
I recently viewed a video where an individual removed the butterfly valve from the throttle body of an F-250 6.7L, claiming an increase in fuel efficiency. Has anyone else attempted this modification? I am seeking further insights before proceeding.
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Mountain Pass
Joined: Apr 2024
Posts: 110
Likes: 6
From: Beaumont California
yes, but on the video, it wasn't deleted truck.Nor was the electronic wire pulled off
Cargo Master
Joined: Feb 2017
Posts: 2,435
Likes: 732
From: Wisconsin
I found this video, not sure if the OP saw the same one
Hotshot
Joined: Jul 2013
Posts: 14,297
Likes: 2,197
this might have a different answer depending on what year truck you have.
on a 2017 thru 2019 6.7, the PCM verifies the butterfly valve operation using calculations that involve MAF, MAP, EBP. the PCM expects the MAF rate to go down as the EGR (controlled by butterfly valve in throttle body) flow goes up. if your butterfly valve is gone, MAF will never go down...you will get EGR flow insufficient error codes. if you are in an emssions inspection state/city like I am...your truck will go into emmissions not ready status and you will never pass inspection.
on a 2017 thru 2019 6.7, the PCM verifies the butterfly valve operation using calculations that involve MAF, MAP, EBP. the PCM expects the MAF rate to go down as the EGR (controlled by butterfly valve in throttle body) flow goes up. if your butterfly valve is gone, MAF will never go down...you will get EGR flow insufficient error codes. if you are in an emssions inspection state/city like I am...your truck will go into emmissions not ready status and you will never pass inspection.
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Fleet Mechanic
Joined: Oct 2022
Posts: 1,822
Likes: 898
From: Dallas Metroplex
I was waiting on you to respond, @speakerfritz , as I remember you were researching those butterfly valve issues when you installed your new intake (just couldn't remember the exact details).
I watched the video for a few minutes, and the phrase "shade tree mechanic" kept intruding my thoughts. After the third time being reminded to "subscribe and comment" I bailed. I think it was around the point where he mentioned fabbing a restrictor plate for the EGR and fashioning his own steel intake...
I watched the video for a few minutes, and the phrase "shade tree mechanic" kept intruding my thoughts. After the third time being reminded to "subscribe and comment" I bailed. I think it was around the point where he mentioned fabbing a restrictor plate for the EGR and fashioning his own steel intake...
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Tuned
Joined: May 2010
Posts: 499
Likes: 132
From: Pleasanton, CA
In my opinion there is no way removing a butterfly valve would net you a 6-MPG increase. If it did then why wouldn’t Ford already be all over this since MPG is every manufacturers goal for any vehicle.
My 2-cents
Mike
My 2-cents
Mike
Laughing Gas
Joined: Dec 2016
Posts: 779
Likes: 188
From: Knightstown Indiana
The butterfly is necessary to create a pressure drop to draw in egr. On a deleted truck it can be removed, but when wide open I have a hard time believing it creates any noticeable restriction.
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