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#1 |
Registered User
Join Date: Aug 2006
Location: US
Posts: 184
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Gas Gauge issues
Hello. New to the board. Just getting started on a `68 C10 handed down a couple of generations and needs a load of work.
Ok trying to fix the gas guage on this `68 C10. Father in law told me it needed a new float when I picked it up from him. I ordered one and this evening went about installing it. When I pulled out the old sending unit, all looked pristine including the little bag. I think maybe he already replaced it once. At any rate I decided to pull off the old float even though it looked fine. When I pulled it off I noticed it was heavy. So, I'm thinking ok, maybe it's waterlogged. Decided to put the new obviously light and hollow one on and just for curiosity sake float the old one in the sink. Old one sank except one corner held it up. Ok, maybe bad. So, I put the new one in and reinstalled. Hit the key, and nothing. Well, here's what I noticed. Needle sits near "Empty" label. When you hit the key, though, it moves maybe a 1/16 inch or so further to the left (empty side). Unplug the sending unit wire from fuse box, hit the key and it goes all the way over to full+. Like 3 o'clock position. So, I'm trying to figure out...Bad sending unit? Maybe somehow positioned wrong? What? Thoughts? |
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#2 |
Registered User
Join Date: Jun 2002
Location: Knoxville Tenn.
Posts: 3,058
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Re: Gas Gauge issues
Check here:
www.fix-a-gauge.com
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56 Chevy Bel-Air 2dr. HT (purchased new) 71 Chevy Cheyenne SWB PU (502HO) 65 GMC short bed step--work in progress and my gofer |
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#3 |
Registered User
Join Date: Jun 2002
Location: Knoxville Tenn.
Posts: 3,058
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Re: Gas Gauge issues
This should help also:
http://www.6066gmcguy.org/Electrical-02.htm
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56 Chevy Bel-Air 2dr. HT (purchased new) 71 Chevy Cheyenne SWB PU (502HO) 65 GMC short bed step--work in progress and my gofer |
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#4 |
Registered User
Join Date: Jul 2006
Location: El Cajon Ca
Posts: 84
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Re: Gas Gauge issues
If you take the wire loose from the sender and ground it does the guage go to empty?? If the guage reads past full at the 3:00 position when you connect it the sending unit is bad. Check the back of the fuel guage in the dash ground the guage and see if it reads empty. If not guage is bad. This may help with trouble shooting.
Last edited by 68SHORTBOX; 02-08-2007 at 08:43 PM. |
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#5 |
Registered User
Join Date: Aug 2006
Location: Bakersfield,CA
Posts: 7,893
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Re: Gas Gauge issues
is your tank still in the cab??? cuz mine would go to 3:00 position and then i grabed the wire and made contact again on the tank and its fine its only done that to me twice though but food for thought
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-steven Alte Seele S.S. "Allison" '72 C/10 LWB 350SB/TH350 - DD PITBULL IS NOT A CRIME |
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#6 |
67-72 Addict!
Join Date: Feb 2002
Location: The TAX State!
Posts: 7,857
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Re: Gas Gauge issues
If the new one reads empty it may have a bad float. The last sending unit I installed had a tiny break along the soldered joint and it was brand new. Take the new unit out and pop the float off and submerge it to see if it fills up or you see air bubbles. Just cuz it's new doesn't mean it's not defective. Good luck!
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Jim 1970 C/10 Fleetside w/Ghost Flames Lowered 4.5" front and 4" rear (Raked) 355/350 Turbo w/shift kit 10" Redneck Performance Verter w/2500 stall Hooker Super Comps part#2808-1 Performer RPM Air-Gap 12 Bolt w/3:73 gears- Eaton Posi Comp Cams XE262 with 1.6 Crane Energizers, Road Demon 625 and Brodix IK 180 heads |
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#7 | ||
Registered User
Join Date: Aug 2006
Location: US
Posts: 184
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Re: Gas Gauge issues
I got the following response on another board...
Quote:
Quote:
...So, I'm thinking that may be it. Thoughts? Last edited by DoobieBrother; 08-31-2006 at 02:39 PM. |
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#8 |
Registered User
Join Date: Mar 2006
Location: Rapid City, SD
Posts: 96
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Re: Gas Gauge issues
Dumb question, but how much gas is in the tank? I just replaced the sending unit on my 69, the tank had a bunch of crap in it, the sock was torn and the stem for the sender was plugged solid. When I put the replacement sender in, hit the key, it was still on empty. I thought crap, the used sender I had picked up was no good, but it looked like new. I went to the gas station, added gas and low and behold, it came up. It may not be 100% accurate, I don't know how much gas was in the tank to begin with, but it works. Mine only had the one wire for the power, no ground wire.
Keith
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Keith ------------- 1980 C-10 1981 C-30 |
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#9 |
The LuvShack Garage
Join Date: Jan 2004
Location: Maple Grove, TN (West Side)
Posts: 30,477
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Re: Gas Gauge issues
Do you have this in a larger version?, very handy to have
![]() If so please E-mail to luv2xclr8@charter.net (Subject 67-72)
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Owner/Op: "TN Classic Transport Carriers" The Toy: "Square Vette" 72 Hybrid Blazer Toy Barn: "LuvShack" 40 x 60 x 20 Shop Tow Piggy:"Maddy" 88 Silverado 3500 Hauler: "Feathers" 14 Aluma 8218T |
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#10 |
Registered User
Join Date: Jul 2006
Location: El Cajon Ca
Posts: 84
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Re: Gas Gauge issues
Will enlarge it and PM to you.
Last edited by 68SHORTBOX; 09-01-2006 at 12:11 AM. |
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