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03-20-2002, 03:35 PM
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#1 |
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Registered User
Join Date: Jun 2001
Location: Oklahoma City Oklahoma
Posts: 173
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Fuel guage
Fuel gauge in my 71 swb worked fine, installed a new poly tank in the rear, ran a new wire to fuel gauge, have tank filled up but only shows 1/4 on fuel guage. What have i done wrong. Thanks
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1971 Chevy SWB Oklahoma City, Oklahoma |
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03-20-2002, 04:04 PM
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#2 |
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Registered User
Join Date: Jan 2002
Location: Henderson, NV
Posts: 358
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Same thing happened to me. The float had a pin hole in it and wouldn't float to show a full tank. Only got to 1/4.
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1980 Chevy Shortbed Pickup 1969 Z28 engine Turbo 350 |
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03-20-2002, 04:08 PM
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#3 |
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Registered User
Join Date: Jun 2001
Location: Oklahoma City Oklahoma
Posts: 173
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I thought that is why you buy brand new, so you don't have these kind of problems. i guess i will be pulling the bed off agian.
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1971 Chevy SWB Oklahoma City, Oklahoma |
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03-20-2002, 05:52 PM
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#4 |
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Old member
Join Date: Jan 2002
Location: Liberty, & Garden City S.C. , U.S.
Posts: 19,945
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Where did you hook the wire? It also needs a ground off of the sender. Need more info
------------------ Andy 71's Are for ever!!! or 67,68,69,70,72 http://geocities.com/chevy71tpi/main.html
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1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71  Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs. |
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03-20-2002, 06:05 PM
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#5 |
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Registered User
Join Date: Jan 2002
Location: Sahuarita, AZ USA
Posts: 2,033
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If it wasn't grounded, it would read past full, wouldn't it?
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Bill - Tucson, AZ 47 Chevrolet 2 dr sedan 56 Chevrolet 210 2 dr sedan 66 Chevrolet Malibu 2 dr 4 speed 71 Chevrolet C30 Longhorn 86 Chevrolet Monte Carlo SS (Sold) 01 Chevrolet Tahoe IM - BUSTERWIVE@aol.com |
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03-20-2002, 06:34 PM
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#6 |
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Weapons Of Construction
Join Date: Apr 2000
Location: Colorado, USA
Posts: 1,095
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Is your old gauge still hooked up and somehow altering the reading? Disconnect your new one and see if the gauge goes to past full (open circuit). Then short it to ground and see if it goes to past empty (short circuit). If both of those tests work, maybe your sender is bad, or maybe the sender doesn't have the right resistance range to work with your gauge.
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1971 GMC 2500, 402/TH400 4.10 Daily Driver Lafayette, CO |
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03-20-2002, 06:36 PM
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#7 |
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Registered User
Join Date: Jun 2001
Location: Oklahoma City Oklahoma
Posts: 173
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Ground appears to be good off tank, and it did read past full until i hooked it up to guage. When i hooked up to guage it went down to almost empty, filled tank up and went up to 1/4 and hasn't moved since
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1971 Chevy SWB Oklahoma City, Oklahoma |
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03-20-2002, 08:09 PM
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#8 |
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Weapons Of Construction
Join Date: Apr 2000
Location: Colorado, USA
Posts: 1,095
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Sounds like either a sunk float or something binding and not letting it come to the top.
Either that, or a sending unit that doesn't match your gauge. Contact the vendor and ask them what the resistance reading of the sender should be at full and empty. Compare that to factory spec, and also to what yours is doing. Just pull the wire and ohm from the wire to ground. I'm betting you'll end up pulling the tank and sender and either rotating the sender 60 degrees, or bending the arm because it's dragging on the side of the tank. Just a hunch...
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1971 GMC 2500, 402/TH400 4.10 Daily Driver Lafayette, CO |
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