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| | | | Joined: Jan 2013 Posts: 1,084 'Bolter | | 'Bolter Joined: Jan 2013 Posts: 1,084 | When the engine starts fuel gauge reads empty. After a few minutes it max's out at 1/4 tank even though tank is full. What do you guys think?
Allen
Yeah, well, that's just like, you know , your opinion, man - The Dude
1948 Chevy 3600 - goal Original restoration, Current Stage 1 - Disassembly and getting body in primer
1954 GMC 3100 goal Hot Rod, Current Stage 1 - Get body in primer
1931 Ford Model A 5 window Coupe - Old Skool Hot Rod
1945 Ford 2N Tractor - Runs great
1964 Ford 2000 Tractor - Use it every week
1974 Stingray Corvette
| | | | | Joined: Oct 2016 Posts: 916 'Bolter | | 'Bolter Joined: Oct 2016 Posts: 916 | Bad connections that are causing a voltage loss?
Last edited by Norcal Dave; 10/09/2017 4:41 AM.
~ Dave
1950 Chevrolet 3600 3/4-ton with 261 engine & T5 Transmission
| | | | | Joined: Jul 2014 Posts: 1,289 Moderator for Tons o' Fun , Co-Moderator Driveline Forum | | Moderator for Tons o' Fun , Co-Moderator Driveline Forum Joined: Jul 2014 Posts: 1,289 | Whats interesting is that it takes a few minutes for this to happen. I agree with checking all of the connections for corrosion and verify the ground wire on the sending unit is well grounded but I'm wondering about the guage itself. Somewhere on this site was a guage troubleshooting guide and I'm also wondering that if we knew what the resistance was supposed to be , if you could check the resistance on the sending unit to see if its correct for what it should be with a full tank ? There's another post on this same forum, might check it out to see if that provides some help. I'm anxious to see other folks recommendations.
Ron - - Dusty53 1954 Chevy 3604In the Gallery Forum "You can't dance with the Devil and then wonder why you're still in Hell."
"They will forget what you've said, and they will forget what you have done but they will never forget the way you made them feel." | | | | | Joined: Mar 2010 Posts: 10,279 Renaissance Man | | Renaissance Man Joined: Mar 2010 Posts: 10,279 | Remove the ground wire from the sending unit to see if the gauge goes past full with the key on.
If it doesn't, this might indicate that the back of your gauge isn't grounded properly. This is common when one gets carried away with painting parts.
If it does go to past full with the key on, then your problem is likely a bad sending unit. Take it out and wire it up correctly so that you can manually move the float up and down while watching the gauge.
Carl
1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission
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