Easiest DEF delete ?
New User
Joined: Feb 2017
Posts: 2
Likes: 0
My guess is you used the pyro that was connected by one of the short exhaust tubes on top of the engine. I used the same one and it read erratic like yours. Found out you are supposed to take one of the egt probes off the exhaust you removed. There is like four of them on there. Once I put that one on it worked as intended.
Thanks for the info. I was about to get a new pyro kit. I'll try this first. Which one did you use, are they all the same?
Btw I passed emission test, just an OBD reading here in WI, no sniff or visual.
Postmaster
Joined: Nov 2003
Posts: 3,595
Likes: 0
From: Utah County, UT
This is good to hear, I have a straight pipe that I will give a go first, otherwise was looking into a M100464 Donaldson, 4 in/4 out with the highest dba reduction
Mountain Pass
Joined: Jan 2017
Posts: 176
Likes: 11
There all the same. Glad you passed. Enjoy
Postmaster
Joined: Nov 2003
Posts: 3,595
Likes: 0
From: Utah County, UT
Well delete is in, the jet from variable vane turbo is too much for me, quick measurement of space and a 10.3" diameter muffler probably isn't going to fit. Anyone have suggestions on muffler that will kill the jet rushing sound?
Senior User
Joined: May 2012
Posts: 164
Likes: 0
We were friends until that last comment...LOL. When you say too loud are you referring to inside the cab, outside or both?
Postmaster
Joined: Nov 2003
Posts: 3,595
Likes: 0
From: Utah County, UT
Just outside, want to tame the jet sound some. Keep the neighbors on a good note. My 7.3 had an mbrp that I loved the sound on, but wasn't variable vaned so not sure I will be able to match
Hotshot
Joined: Nov 2013
Posts: 10,107
Likes: 96
From: Hempstead, TX
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 6 Best Deals Available on New Fords & Lincolns Right Now
Brett Foote
This Hennessey Takes the Expedition Tremor's Off-Roading Capability to the Next Level
Verdad Gallardo
Top 10 Fords at 2026 Carlisle Ford Nationals
Joe Kucinski
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Postmaster
Joined: Nov 2003
Posts: 3,595
Likes: 0
From: Utah County, UT
This I like
Just doesn't say what muffler
Mountain Pass
Joined: Jan 2017
Posts: 176
Likes: 11
Hope you find a muffler that works for you. Let us know what you end up using and how you like it. But the real question is how do like the new performance of your truck?
Postmaster
Joined: Nov 2003
Posts: 3,595
Likes: 0
From: Utah County, UT
Just the tow tune currently, but it is nuts how much power this thing makes, initial impressions have me grinning, as I drive to and from work this next week I'll report back. Might even take time to load other tunes in. I am anxious for shift on fly that should be ready in a couple weeks.
Senior User
Joined: May 2009
Posts: 282
Likes: 0
Yeah you'll love it, so much better without that crap on it. I would personally wait till you have shift on the fly to switch between tunes too much thou. These trucks have an adaptive learning period on the transmission that can cause some erratic shifting when you first load a tune, just like if your dealer reflashed or your batteries went dead, and it has to relearn every time you flash a new tune. That's why I went sotf. With the sotf you flash the sotf file and it only has to go through that adaptive learning process once. The different settings just change the shift pressure a bit between levels, no funky shifting. At least that how mine work, seems like less wear and tear on your transmission.
Hotshot
Joined: Nov 2013
Posts: 10,107
Likes: 96
From: Hempstead, TX
This and the M08421 I have been looking at, the 421 should be quieter at the cost of cfm. Did you install?
This I like
https://youtu.be/ukrodubWUQ8
Just doesn't say what muffler
This I like
https://youtu.be/ukrodubWUQ8
Just doesn't say what muffler
Postmaster
Joined: Nov 2003
Posts: 3,595
Likes: 0
From: Utah County, UT
Yeah you'll love it, so much better without that crap on it. I would personally wait till you have shift on the fly to switch between tunes too much thou. These trucks have an adaptive learning period on the transmission that can cause some erratic shifting when you first load a tune, just like if your dealer reflashed or your batteries went dead, and it has to relearn every time you flash a new tune. That's why I went sotf. With the sotf you flash the sotf file and it only has to go through that adaptive learning process once. The different settings just change the shift pressure a bit between levels, no funky shifting. At least that how mine work, seems like less wear and tear on your transmission.
Postmaster
Joined: Nov 2003
Posts: 3,595
Likes: 0
From: Utah County, UT
just me so used high idle to check it out, there is enough delay I can turn if off and make it back there pretty easy. Does allow the whistle to shine through...