Before returning to stock, down load the SCT software to your PC. You can find the info on SCT website.
After you have loaded the SCT software to your PC, your ready to save a copy of the stock file to your PC. You do this just in case the SCT loses the stock file when it's trying to return the truck back to stock tune.
Now onto you current issue. Once you saved a copy of the stock file to PC, then try returning back to stock. See if that fixes your fuel gauge issue. If your running a custom tune, contact the tune writer with the issue. If it's a canned tune, contact SCT. Sometimes custom tunes get corrupted during the email.
Now, you may try this also. The fuel gauge issue also happens sometimes if the owner leaves the key in the "on" position when fueling up. The fix is to just drive it for a couple of days, the key cycle of starting the truck on/off resets something in the PCM.
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2004 F350 CC DRW King Ranch
X-3 tunes by DJ'S,QT,GH,ID. Gryphon FICM tunes, ARP studs,Stage 1turbo,ATS coolant recirc lines,Swamp's 48v ficm,coolant filter,AD2,Snow Perf stage II,EGR delete,4" turbo back straight pipe,S&Bintake,Quad "A" pillar autometer gauges,Suncoast Tri Disk Conv.,Billet input shaft,Suncoast superduty rebuild kit,Trans-go shift kit,Mag-Hytec trans pan,CFM+ elbow,ccv mod,15K reese 5er,17" LCD TV/DVD,Cobra 29 Nitewatch CB