What's the best Engine Tune

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CAVEMANN

Active Member
Jan 5, 2020
142
38
28
Ajo, Arizona
Truck Year
2017
MAKE SURE you double check your oil level after the dealer replaces your oil, my local dealer over filled my truck every time I got my oil changed. It got so bad that I had one free oil change left on my contract when I decided to changing my own oil. I use Amsoil 15-40 diesel oil. I run stock oil filters because I do want to give the dealer ANY reason to deny my warranty if I have a problem.
You don't think the dealer would balk at 15w40 if push came to shove??
 

John Jensen

Active Member
Mar 22, 2016
340
160
43
85
San Diego County
www.johnfjensen.com
Truck Year
2016
5w-40
 

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John Jensen

Active Member
Mar 22, 2016
340
160
43
85
San Diego County
www.johnfjensen.com
Truck Year
2016
You should get it back tomorrow
 
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CAVEMANN

Active Member
Jan 5, 2020
142
38
28
Ajo, Arizona
Truck Year
2017
I'm a little confused, the instructions on SFT's site show 2 steps to download the usr file, the instructions are the same for the 2 instructions with the exception of the name, is there only one file or am I missing something, the instructions are very clear but also confusing, is there one file or 2 files??
 

John Jensen

Active Member
Mar 22, 2016
340
160
43
85
San Diego County
www.johnfjensen.com
Truck Year
2016
There's only one stock.usr file
There's only one SFT ECU tune .usr file in my early system of a tuner for the ECU tune and a tuner for the TCU tune.
Not sure in the new tuner where both ECU & TCU tunes are housed.
 
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Ferrell

New Member
Jun 1, 2020
6
3
3
Linden, NC
Truck Year
2019
I'm a little confused, the instructions on SFT's site show 2 steps to download the usr file, the instructions are the same for the 2 instructions with the exception of the name, is there only one file or am I missing something, the instructions are very clear but also confusing, is there one file or 2 files??
I am quite confused as well. I downloaded the one file it gave me and emailed that to SFT last Thursday afternoon. Unfortunately they were gone for 4 days but hopefully get something back today so I can upload tune into my truck. Hopefully the one file does both engine and transmission!
 
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John Jensen

Active Member
Mar 22, 2016
340
160
43
85
San Diego County
www.johnfjensen.com
Truck Year
2016
My guess would be the one file does both engine and transmission
 

CAVEMANN

Active Member
Jan 5, 2020
142
38
28
Ajo, Arizona
Truck Year
2017
Thanks again John, I've been working on diesels since 1979, but only a couple were this small, and they were strokes. Your knowledge on these is very helpful. Looking at maintenance diagrams and parts breakdowns this little engine looks to be very high tech & complex.
 

John Jensen

Active Member
Mar 22, 2016
340
160
43
85
San Diego County
www.johnfjensen.com
Truck Year
2016
Looking at maintenance diagrams and parts breakdowns this little engine looks to be very high tech & complex.
Yes, and from what I have read IMO the tunes and shutting off the EGR are the best things you can do for it.
My Service Manager supports the tunes because my Eco is my daily driver with more short hops than freeway time. Short hops are this engine's nemesis.
 

CAVEMANN

Active Member
Jan 5, 2020
142
38
28
Ajo, Arizona
Truck Year
2017
Tunes came in & both ECM & TCM are in the package as one file. John, how is the transmission rallytime tune activated once installed?
 

John Jensen

Active Member
Mar 22, 2016
340
160
43
85
San Diego County
www.johnfjensen.com
Truck Year
2016
Tunes came in & both ECM & TCM are in the package as one file. John, how is the transmission rallytime tune activated once installed?
Tow Haul mode puts you in the Rally tune. Punch it and you'll feel it. He says it is also a better towing tune
 

CAVEMANN

Active Member
Jan 5, 2020
142
38
28
Ajo, Arizona
Truck Year
2017
That's kind of what I figured, I'll install the tune Thursday, I can't risk problems today because the wife has a doctors appointment in Phoenix tomorrow. I'd love the chance to try the tune but just cant chance it. I'm also curious about the folks running distilled water or diluted DEF, my truck is a 17 & probably has the DEF quality sensor. I wonder if that part could be turned off with ALFAOBD?
 

John Jensen

Active Member
Mar 22, 2016
340
160
43
85
San Diego County
www.johnfjensen.com
Truck Year
2016
My 2016 is said to have the DEF sensor and I run 100% distilled water with no problems on both the GDE and SFT tunes. TC Diesel has done tests to see how far you can dilute DEF and not throw a code on a stock tune. Not sure of the numbers right now.