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05-07-2004, 08:16 AM
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#1 |
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Too many projects
Join Date: Aug 2002
Location: Morrow, OH
Posts: 344
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Fuel guage problem
My fuel guage went to empty when the fuel tank is full. This sending unit was new in November or December. Any ideas. When I filled the tank it went to full, sat overnight & it said empty.
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Jim   '55 Chevrolet Pickup '56 Chevrolet Belair '04 Chevrolet Astro '95 Chevrolet Blazer |
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05-07-2004, 08:27 AM
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#2 |
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Almost done!
Join Date: Apr 2004
Location: Woodstock GA
Posts: 193
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It sound to me like your float don't float! Pull it out and shake it. If it has any fuel inside, get a new one.
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The 1970 SWB Project Removed 6cyl manual trans, manual everything V8-350 Auto/PS/PDB Blazer Fuel Tank Behind the Marker Light Fuel Fill |
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05-07-2004, 09:37 PM
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#3 |
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Too many projects
Join Date: Aug 2002
Location: Morrow, OH
Posts: 344
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This was a brand new gauge in December. If I disconnect the wire from the sending unit, the fuel gauge goes to full, reconnect the wire, the gauge goes to empty, or there abouts. When the truck is moving, I can see the gauge moving like the float is moving.
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Jim '55 Chevrolet Pickup '56 Chevrolet Belair '04 Chevrolet Astro '95 Chevrolet Blazer |
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05-07-2004, 10:19 PM
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#4 |
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Account Suspended
Join Date: Apr 2004
Location: N.C. high country
Posts: 6,107
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Sounds like you have a fuel tank not grounded. Theres only one wire hooked to the sending unit and the tank grounds it. Check for loose tank bolts .
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05-07-2004, 11:07 PM
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#5 |
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Too many projects
Join Date: Aug 2002
Location: Morrow, OH
Posts: 344
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Thanks, I'll try grounding the tank.
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Jim '55 Chevrolet Pickup '56 Chevrolet Belair '04 Chevrolet Astro '95 Chevrolet Blazer |
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05-07-2004, 11:36 PM
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#6 |
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Account Suspended
Join Date: Oct 2002
Location: Olathe, KS
Posts: 2,301
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Check for a grounded sending unit wire. The gauge will go to E when the brown wire (sending unit wire) is grouned. When the sending unit wire does not recieve a ground signal it will cause the gauge to go past full.
Hopefully you'll find a shorted spot in the wire going from the tank to the gauge, if not your sending unit could have issues (sinking float). |
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05-08-2004, 08:03 AM
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#7 |
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Too many projects
Join Date: Aug 2002
Location: Morrow, OH
Posts: 344
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Thanks Garrett,
I'll trace the wire, see what I can come up with. By the way, I have a brother that lives in your town.
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Jim '55 Chevrolet Pickup '56 Chevrolet Belair '04 Chevrolet Astro '95 Chevrolet Blazer |
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