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I need help but you all know that.
#1378465 Fri Sep 25 2020 11:03 PM
Joined: Feb 2001
Posts: 6,874
W
Master Gabster
I have a 20 gal gas tank and it is mounted under the bed and the gauge has never read correctly. It never reads full and so I am afraid to run it to empty. Is there a fail-safe way to see how much gas is still in the tank? I carry a reserve in a container in the bed of the truck.


Ron, The Computer Greek
I love therefore I am.

1960 MGA Roadster Sold 7/18/2017
1954 3100 Chevy truck in the Gallery
2017 Buick Encore
Pix on Photobucket
Re: I need help but you all know that.
WE b OLD #1378479 Sat Sep 26 2020 12:21 AM
Joined: Mar 2010
Posts: 9,451
5
Master Gabster
I knew a guy who carried a broom handle to shove in the filler neck to check his behind-the-seat tank. He needed the full length, given the angle of the filler neck and the length of the tank.

Re: I need help but you all know that.
WE b OLD #1378509 Sat Sep 26 2020 09:33 AM
Joined: Apr 2005
Posts: 2,624
C
Shop Shark
My 37 Buick has always had a lying through the teeth gas gauge and the tank is a bear to pull so I zero the odometer and know I have a safe 300 mile cushion. 150 miles is a half tank and 225 miles is a quarter tank remaining. Has worked for 40 years.


Evan
Re: I need help but you all know that.
WE b OLD #1378510 Sat Sep 26 2020 10:15 AM
Joined: Feb 2001
Posts: 6,874
W
Master Gabster
I have heard of spraying hot water on the tank and it will leave a line of the cooler fuel. I had thought of the stick but the filler is on the fender and would go in sideways. I also figured I would break the stick off in there.


Ron, The Computer Greek
I love therefore I am.

1960 MGA Roadster Sold 7/18/2017
1954 3100 Chevy truck in the Gallery
2017 Buick Encore
Pix on Photobucket
Re: I need help but you all know that.
WE b OLD #1378565 Sat Sep 26 2020 05:58 PM
Joined: Feb 2001
Posts: 6,874
W
Master Gabster
I took the truck to a new Speedway gas station here in town to fill it up. the ramp was so slanted that has soon as turned on the hose fuel squirted out righ away. Usually does that when it is full not when I first start. It took quite awhile to fill up but it only took 12.3. I guess I will figure that I have 5-gallon reserve and make sure my emergency container is full.


Ron, The Computer Greek
I love therefore I am.

1960 MGA Roadster Sold 7/18/2017
1954 3100 Chevy truck in the Gallery
2017 Buick Encore
Pix on Photobucket
Re: I need help but you all know that.
WE b OLD #1378641 Sun Sep 27 2020 07:42 AM
Joined: Dec 2007
Posts: 1,437
J
jdl Offline
Shop Shark
Odometer would probably be the easiest. I know you're good at calculating mileage. Say you average 20mpg in theory that should give you around 400 miles to bone dry. Fueling up every 300 miles should be safe in that scenario unless you're drag racing. wink If in doubt you could knock on the tank, should be a noticeable change in sound between empty air and fuel.

20 gallon tank x mpg = find a gas station 100 miles before the math says your tank is empty. My Biscayne loses connection on the sending unit intermittently and this is my method.

Last edited by jdl; Sun Sep 27 2020 07:53 AM.

Jordan D. Long

1954 Chevrolet 3100 1/2-Ton

And some more pictures
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I got a 'Possum Pickup... Now I'm the Roadkill King!!! Anyone want to make some Stovebolt Stew?
Re: I need help but you all know that.
WE b OLD #1378644 Sun Sep 27 2020 09:49 AM
Joined: Feb 2001
Posts: 6,874
W
Master Gabster
The 20 mpg went away when I found out the calculation was flawed by using mile roads that are not exactly a mile. They are off by 10 t0 20 percent. I use gps and the true mileage is 15 on trips and 10 around time.


Ron, The Computer Greek
I love therefore I am.

1960 MGA Roadster Sold 7/18/2017
1954 3100 Chevy truck in the Gallery
2017 Buick Encore
Pix on Photobucket
Re: I need help but you all know that.
WE b OLD #1378683 Sun Sep 27 2020 05:06 PM
Joined: Nov 2004
Posts: 1,855
J
Workshop Owner
The gas gauge in our shop truck quit working over 10 years ago. As already recommended, we rely on the odometer. We fill it up when it gets close to 300 miles as we know it'll go at least 340-350 miles with a 26 gallon tank. This is a 2002 Silverado with over 315,000 miles on the original 5.3 engine and transmission.

Just read your odometer like a gas gauge. If you think about it, it's probably more accurate anyway. That is unless you're leaking or burning real rich, and if so, you would most likely already know you have other problems just by the smell.

John

Last edited by J Lucas; Sun Sep 27 2020 05:12 PM.

J Lucas





1941 Chevy 1/2-Ton
1942 Chevy 1.5-Ton SWB
1959 Chevy Apache 31 Fleetside
1959 Chevy Apache 32 Fleetside
1959 Chevy Viking 40

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Re: I need help but you all know that.
WE b OLD #1378702 Sun Sep 27 2020 08:22 PM
Joined: Feb 2001
Posts: 6,874
W
Master Gabster
The odometer is very difficult to read. I have to use a flashlight to be able to see it. I drove to a car show today in the next town but forgot to note the reading before I left and set my GPS. ohwell

Last edited by WE b OLD; Sun Sep 27 2020 08:24 PM.

Ron, The Computer Greek
I love therefore I am.

1960 MGA Roadster Sold 7/18/2017
1954 3100 Chevy truck in the Gallery
2017 Buick Encore
Pix on Photobucket
Re: I need help but you all know that.
WE b OLD #1378745 Mon Sep 28 2020 02:15 AM
Joined: Dec 2007
Posts: 1,437
J
jdl Offline
Shop Shark
Ron, have you thought about trying to get a better gauge and sending unit?


Jordan D. Long

1954 Chevrolet 3100 1/2-Ton

And some more pictures
Photobucket

I got a 'Possum Pickup... Now I'm the Roadkill King!!! Anyone want to make some Stovebolt Stew?
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