Hey guys, I just had my truck in the shop yesterday morning and drove it home today with the 48-gallon Titan replacement tank installed. I also had my fuel filters replaced since it was in the shop and I am very close to the 300 Engine Hours recommended change interval when using biodiesel. $2,315 out the door with both of those jobs done with taxes included. The Aftermarket Manager told me the mechanics that drive the 6.7 replace the fuel filters every 15K miles (biodiesel). I was at 10,775 in the door, and I will be at 15K within 2 months anyway, so since I was in the shop it was a good time to get that done also.
My dealer uses the same mechanic to install all the Titan replacement tanks, and seems this guy has years of experience doing many of them and he is the only one in their shop that does them. Of course I had to be his 1st F150 to do, but he told the Aftermarket Manager that it went very well like how it goes on the Super Duty's, so that was reassuring. There was not an option to swap out for the bigger Super Duty filler cap, so I have the same capless inlet still that everyone has, but the Aftermarket Manager said they are going to the capless because the capped ones eventually end up leaking and causing CEL code to appear (I do have the Audi funnel that I will carry in the truck in case I am at a place where I need fuel and can only find the big nozzle pumps; although, with the longer cruising range now I should be able to avoid this.).
The installer really appreciated that I brought the truck into them with the FORScan mod already done to change the tank size, as it made it really easy for him to see that things were correct after the install. In case anyone else will be upsizing their 6.5' bed trucks to the 48-gallon Titan tank here is the FORScan mod to make...
Feature: Change Fuel Tank Size
Module: IPC
Address: 720-03-01
Original Value: 6003 D900 0067 (26-gallon tank)
Changed Value: xxx7 19xx xxxx (48-gallon tank) (x = unchanged Original Value)
Notes: 3D9 = 26-gallon, 719 = 48-gallon. The checksum will alter the last block of 4 xxxx Changed Value, so they will end up different than 0067.
I made the above FORScan mod the night prior to taking the truck in. I was at like 47 miles to empty, then after the mod jumped up to like 203 miles to empty, so I knew the mod worked. The mod also temporarily reset my mpg average to 00.0 on Trip 1 and Trip 2, but when I started up the truck in the morning that was restored back to what they were. I did pump in 3 additional gallons before handing the truck over to them. Now the truck with the larger tank is 57 miles to empty, and I think I am going to wait to see the 50 miles to empty warning pop up before fueling back up just to see that trigger--I can say that there will be a very thin slice of orange on the gauge when that happens. I will probably going forward refuel when down to 1/4 tank, which is the best practice for diesels from what I have read (helps keep water from entering the fuel via condensation).
I'll post some more updates once I have some more experience using the bigger tank.