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Yet another fuel guage issue
#784775 Thu Sep 29 2011 09:15 PM
Joined: Oct 2009
Posts: 428
J
jon1963 Offline OP
Shop Shark
Ok folks....I realize that this has been gone over a million times, but here goes my turn. 63 Chevy truck, 12 volt system. Brand new wiring throughout whole truck, new fuel tank sending unit, guage just rebult by bowtie bits. Have good power and grounds...have plenty of fuel (1st thing I checked) and guage will only read 1/4 full. Everything is for 0-30 ohms. Help please.


http://s971.photobucket.com/albums/ae197/jon63c10
1963 c-10 shortbed stepside 427 BBC T16 HD 3 speed
1963 c-10 shortbed fleetside 348 "w" 1st gen big block & powerglide
Re: Yet another fuel guage issue
jon1963 #784778 Thu Sep 29 2011 09:26 PM
Joined: Nov 2009
Posts: 240
D
Shop Shark

Since you've elimnated all the other things... Is the sending unit float hitting the side of the gas tank?



When I die, I want to go peacefully like my Grandfather did, in his sleep -- not screaming, like the passengers in his car.
-Unknown-
Re: Yet another fuel guage issue
di1953gmc #784788 Thu Sep 29 2011 09:51 PM
Joined: Oct 2009
Posts: 428
J
jon1963 Offline OP
Shop Shark
Id planned on pulling it tonight just to make sure it hadn't gummed up. Its been in the tank 3 mo, the guage just got in Monday, so I was thinking that it mighta gummed up some. Might also help tell me if working proper.


http://s971.photobucket.com/albums/ae197/jon63c10
1963 c-10 shortbed stepside 427 BBC T16 HD 3 speed
1963 c-10 shortbed fleetside 348 "w" 1st gen big block & powerglide
Re: Yet another fuel guage issue
jon1963 #784820 Fri Sep 30 2011 12:15 AM
Joined: May 2005
Posts: 6,719
B
General Purpose
Pull gauge and sending unit OUT! Set them up with test wires, including a test ground wire directly to battery terminal, and make them read properly before you do anything else!!!! Maybe you have a 1/4 tank of gas? Anyway work the sender up and down during test to see the gauge work. Don't use ANY of the truck wiring for this. If it all works fine, then you know its Ground or supply. Check ground: Battery to engine, engine to body, body to chassis, chassis to sender ground. Then Check supply circuit all the way to gauge and to sender. (including ignition switch malfunction)

If test does not work, it's the "new" sender or "rebuilt" gauge.

I assume you have checked to see that there is hot to gauge and hot to sender, already, with a test light. and I assume it goes to empty when ignition shut off.

Last edited by bartamos; Fri Sep 30 2011 12:21 AM.

I'm away on an ego trip. Will be back on Feb 30.
I'm not an Auto Mechanic, but I play one on TV.
I charge $0.02 for every opinion and I take Paypal.
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Re: Yet another fuel guage issue
bartamos #784968 Fri Sep 30 2011 02:23 PM
Joined: Oct 2009
Posts: 428
J
jon1963 Offline OP
Shop Shark
Yes, I have hot to guage and hot to sender. And it goes to empty when off.


http://s971.photobucket.com/albums/ae197/jon63c10
1963 c-10 shortbed stepside 427 BBC T16 HD 3 speed
1963 c-10 shortbed fleetside 348 "w" 1st gen big block & powerglide

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