52 Gallon Tank Fuel Gauge reading 3/4 full After Size Adjustment

[Matchrocket]

2017 3500 High Output: Had a 52 Gallon S&B installed. Went into Alpha OBD to adjust fuel tank size and now the cluster is acting very strange.

I adjusted everything per this SOP: https://docs.google.com/document/d/1ztH3blx3NvqztK1HWVSLiY3QwAHw2vEu/edit

VEHCONFIG 3-FUEL CAPACITY: Set to 197 Litters
Fuel Tank 1 Calibration, Empty: 9%
Fuel Tank 1 Calibration, LFW: 23%
Fuel Tank1 Calibration, Full: 98%

Now, my gauge reads 3/4 a tank.
DTE is the same as it was prior.

Also tried the 193L "Trick", no change.
Dropped down to 189L (factory max). No change
Dropped down to 117L, reads Full.

DTE doesn't change with any setting adjustment.

I found that as I adjust the Tank size closer to 117 L stock, the fuel gauge increases towards full (being full around 130L or so, then moving into over full).

What gives??? I have found a view posts like this and zero solutions. There seems to be no rime or reason for why it takes and why it doesn't....

AlphaOBD and DTE correction for 51 gal Tank Mod

Just looking at my log file which I saved before making any changes and I do not see any reference to fuel capacity in the ECU Config 4 section which is per your snapshot above. Exactly. I think a lot of us thought it was a set it and forget it situation. When new software code is introduced...

www.ramforum.com

AlphaOBD and DTE correction for 51 gal Tank Mod

Just looking at my log file which I saved before making any changes and I do not see any reference to fuel capacity in the ECU Config 4 section which is per your snapshot above. Exactly. I think a lot of us thought it was a set it and forget it situation. When new software code is introduced...

www.ramforum.com

Watched Many videos, Searched forums and it seems I am SOL. Anyone with a 17' have luck re-programming?

 

[HarryN]

I don't remember where I read it, but I think what people are doing is just having the tank read "full" until it gets down to ~ 3/4.