Fuel pump differences
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5 Year Member
Joined: Feb 2018
Posts: 136
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From: Kentucky
Fuel pump differences
So I recently ordered the parts needed to complete the 23 to 36 gallon fuel tank conversion from a salvage yard. Instead of sending me the all the parts from a 407 mile 2017 like agreed to, they just threw a regular fuel pump from a 2016 inside the tank. Long story short, after much research it seems to me that the only difference in the two pumps is the actual float arm length. I found where you can order just the arm/sending unit from Rock Auto for $30 shipped. Can anyone confirm my findings? I would rather just order the extended range sending unit and put it on my pump I take out of my 23 gallon tank. Thanks for the help.
Last edited by lweford; Dec 17, 2018 at 10:54 PM.
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Joined: Apr 2018
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So I recently ordered the parts needed to complete the 23 to 36 gallon fuel tank conversion from a salvage yard. Instead of sending me the all the parts from a 407 mile 2017 like agreed to, they just threw a regular fuel pump from a 2016 inside the tank. Long story short, after much research it seems to me that the only difference in the two pumps is the actual float arm length. I found where you can order just the arm/sending unit from Rock Auto for $30 shipped. Can anyone confirm my findings? I would rather just order the extended range sending unit and put it on my pump I take out of my 23 gallon tank. Thanks for the help.
Thread Starter
5 Year Member
Joined: Feb 2018
Posts: 136
Likes: 50
From: Kentucky
Well I think my experiment worked. I just replaced the extended range sending unit on my fuel pump and it seems to be working correctly. I did the Forscan change in the IPC module and it is showing the correct DTE. The only issue I have is that after I installed the completely empty(dry) 36 gallon tank I put pretty much exactly 5 gallons of gas in it. I then went straight to the gas station to fill up. At the station I could only get about 26-27 gallons in it. So I am positive that I have only about 31 gallons of fuel in my tank. AND the fuel gauge shows this. It is not showing completely full. How do I get the last 5 gallons in there?
Thread Starter
5 Year Member
Joined: Feb 2018
Posts: 136
Likes: 50
From: Kentucky
Well I think my experiment worked. I just replaced the extended range sending unit on my fuel pump and it seems to be working correctly. I did the Forscan change in the IPC module and it is showing the correct DTE. The only issue I have is that after I installed the completely empty(dry) 36 gallon tank I put pretty much exactly 5 gallons of gas in it. I then went straight to the gas station to fill up. At the station I could only get about 26-27 gallons in it. So I am positive that I have only about 31 gallons of fuel in my tank. AND the fuel gauge shows this. It is not showing completely full. How do I get the last 5 gallons in there?
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Thread Starter
5 Year Member
Joined: Feb 2018
Posts: 136
Likes: 50
From: Kentucky
Just wanted to give this saga one last update. There IS more than just the sending unit arm length difference in the regular and extended range fuel pumps. The extended range fuel pump is actually taller than the regular pump. The regular fuel pump works and I have driven over 600 miles since the install with no problems. I can even confirm that with as little as 5 gallons of gas in the extended tank the regular pump will work. BUT, I am gonna pull the tank next week and install the extended range pump just because I know it is wrong now. Sorry if I messed anybody up but hey, if you're like me, I love tinkering with my truck so this just gives me another reason to work on it. 
