Fuel tanks
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Senior User
Joined: May 2004
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Fuel tanks
Greeting Ya'll,
I have a small yet significant problem that I would love some help figuring out. First the background: I have a 1978 F-150 4x4 lifted 2" sitting on 33'X12.50/r15's. I have the 400cid with a holly 600 double pumper on. I get about 14-17mpg (I've calculated this many times because even I don't believe this brick gets that good of mileage). The problem is this: When I fill up my rear tank, if I don't use it and it gets warm outside the tank will spew gas out onto the ground out the vent on the cap. With gas prices in excess of $2.30 a gallon, it's just not practical to let this continue.
So, I'm guessing that the vent in the tank is causing problems because I've already changed the gas cap. Because of the age of the truck, I'm guessing that the tank should probably be replaced, and the front tank needs to be replaced as well due to a hole in the top of it. So, here's my question for you all, where can I find gas tanks for these trucks without paying an arm and a leg for them. Any help would be great. Thanks guys.
I have a small yet significant problem that I would love some help figuring out. First the background: I have a 1978 F-150 4x4 lifted 2" sitting on 33'X12.50/r15's. I have the 400cid with a holly 600 double pumper on. I get about 14-17mpg (I've calculated this many times because even I don't believe this brick gets that good of mileage). The problem is this: When I fill up my rear tank, if I don't use it and it gets warm outside the tank will spew gas out onto the ground out the vent on the cap. With gas prices in excess of $2.30 a gallon, it's just not practical to let this continue.
So, I'm guessing that the vent in the tank is causing problems because I've already changed the gas cap. Because of the age of the truck, I'm guessing that the tank should probably be replaced, and the front tank needs to be replaced as well due to a hole in the top of it. So, here's my question for you all, where can I find gas tanks for these trucks without paying an arm and a leg for them. Any help would be great. Thanks guys.
Elder User
Joined: Nov 2002
Posts: 620
Likes: 8
From: USA
Most anywhere sells replacements for around $100 (not sure about the front tank). JC Whitney is an online vendor or likely your local auto parts store. I'm sure the Bronco Graveyard has them, LMC, etc.
I don't see any reason replacing the tank unless there is something wrong, i.e. rust or holes.
I'd check your front one, it might be a hose leaking instead of the tank, or the seal between the sender unit and tank.
Yes, check and service your vent for the over flowing problem.
Jordan
I don't see any reason replacing the tank unless there is something wrong, i.e. rust or holes.
I'd check your front one, it might be a hose leaking instead of the tank, or the seal between the sender unit and tank.
Yes, check and service your vent for the over flowing problem.
Jordan
New User
Joined: Jun 2005
Posts: 20
Likes: 0
From: Minnesota
If you have trouble finding them loaclly you can try Jeff's Bronco Graveyard
http://broncograveyard.com/bronco?sy=&st=gas+tank
http://broncograveyard.com/bronco?sy=&st=gas+tank
Last edited by 1979f2504x4; Jun 17, 2005 at 01:25 PM.
5th Wheeling
Joined: Feb 2005
Posts: 42
Likes: 1
For the front tank, make sure you get one for a 4x4. The metal 2x4 tanks are fairly easy to come by in salvage yards. The 4x4 tanks are a little harder to come by. They're plastic and sit further rearward to clear the transfer case.
Posting Legend
Joined: Sep 2001
Posts: 30,255
Likes: 37
Your tank should have a vent line to a charcoal cannister. Some previous owner may have removed the cannister and plugged the vent line. This will cause gas to back up in the filler tube. Make sure your charcoal cannister vent system is working properly.
