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03-11-2005, 02:37 AM
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#1 |
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Registered User
Join Date: Jan 2005
Location: Mountain Home Idaho
Posts: 544
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Fuel guage problems
My fuel guage does not move anymore. It has found its resting place past the full mark, it hangs out at about the 2 or 3 o'clock position and just sits there. I know I need a new fuel sending unit in my gas tank but why did my needle go completly out of the e to f range? thanks for any help, and where do you recomend I get an aftermarket fuel sending unit
Mike... |
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03-11-2005, 02:41 AM
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#2 |
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Member since 2000
Join Date: Dec 2000
Location: Mountain View Ca / Mexico
Posts: 7,879
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check your connection on the fuse box..........it should be a brown wire if memory serves me right, it is just a female connector that conects to the fuse box......it comes out sometimes. If it isn't that then well move onto the next thing, sending unit or the wiring to the gauge.
goodluck, i know other will give other ideas. |
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03-11-2005, 04:05 AM
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#3 |
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Registered User
Join Date: Aug 2003
Location: Fort Worth Texas
Posts: 275
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While we are on the subject. My gauge works
but wiggles back and forth about a half inch even when it is sitting still. Do I need a new sending unit ? 
__________________
Joe Peters the HatGuy 72' K5 Highlander My Daily Driver http://www.pbhats.com/BLAZER/index.html |
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03-11-2005, 06:21 AM
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#4 |
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Registered User
Join Date: Dec 2004
Location: Paris TX
Posts: 7
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I've got gremlins in my fuel gauge too (in my 3/4 ton). But mine jumps from normal to way past full (about 3 or 4 o'clock), stays there for a few seconds, then falls back to normal. It does this continuously.
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72 GMC Jimmy 72 GMC 3/4 ton Camper Special 70 Chevy 3/4 ton (in pieces) FOR SALE! |
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03-11-2005, 11:49 AM
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#5 |
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Registered User
Join Date: Jan 2005
Posts: 21
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If your gauge goes way past full, then you probably have an open circuit between the sending unit and the gauge. Check that the brown wire from the tank is connected (both at the tank and at the fuse box). If the brown wire is OK (test at the fuse box with a multimeter 90 ohms is full, 0 ohms is empty) then the open could be in the printed circuit harness.
typical fault tree needle way past full..... open circuit between sending unit and dash sending unit is bad needle stays on empty... short between sending unit and dash leak in sending unit float needle works but only between 1/4 and empty 82 ohm ballast resistor behind gauge is bad needle bounces around bad gauge Use a multimeter when in doubt. |
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03-11-2005, 01:13 PM
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#6 |
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Registered User
Join Date: Mar 2004
Location: Sacramento, CA
Posts: 1,084
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Nice troubleshooting steps ssls6. Any idea if you can fix the bad guage that bounces? What part in the guage would cause it to bounce?
I just replaced my tank, sending unit etc and filled up for the first time and I got the bouncy gauge syndrome.
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'71  Jimmy, 350, SM465, NP205, 2in Tuff Country lift, 33s on rallies, TBI, softtop and hardtop"If life was fair you'd be able to afford one of each and a garage large enough to house them all." |
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03-12-2005, 02:10 AM
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#7 |
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Registered User
Join Date: Aug 2003
Location: Fort Worth Texas
Posts: 275
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Thanks ssls6,
The trouble shooting guide is great! Looks like I'll be shoping for a new gauge.
__________________
Joe Peters the HatGuy 72' K5 Highlander My Daily Driver http://www.pbhats.com/BLAZER/index.html |
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03-12-2005, 08:00 AM
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#8 |
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The LuvShack Garage
Join Date: Jan 2004
Location: Maple Grove, TN (West Side)
Posts: 30,482
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HMMMM, BRAND NEW SENDING UNIT HERE, READS EMPTY, SOUNDS
LIKE THE FLOAT ON MINE MAY HAVE SANK / GOT A LEAK IN IT. 
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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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03-12-2005, 05:19 PM
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#9 |
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PROJECT 7DEUCE
 
Join Date: Dec 2002
Location: GRANTS PASS OR
Posts: 21,608
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Nice trouble shootin guide hope fully it will help me on mine bad guage...
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GO BIG GREEN  GO DUCKSMEMBER #6377 72 k-5 daily driver 6'' lift 35'' 350-350-205 slowly getting rust free. Project "7DEUCE" check out my build http://67-72chevytrucks.com/vboard/s...d.php?t=267665 Tim Powell..R.I.P EastSideLowlife..... R.I.P.. |
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03-13-2005, 07:44 PM
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#10 |
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Registered User
Join Date: Jan 2005
Location: Mountain Home Idaho
Posts: 544
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Luv2xclr8: or maybe you got a short according to the trouble shooting guide above...
Mike |
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03-13-2005, 07:46 PM
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#11 | |
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The LuvShack Garage
Join Date: Jan 2004
Location: Maple Grove, TN (West Side)
Posts: 30,482
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Quote:
WE CHECKED IT, MIGHT HAVE MISSED IT, BUT IT LOOKS AS IF IT'S THE FLOAT
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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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Linear Mode
