fuel guage - The 1947 - Present Chevrolet & GMC Truck Message Board Network

firemedicsafd · 06-10-2003, 10:14 PM

my fuel guage reads 1/4 full when its close to empty and about 3/8 when its totally full. whats the problem? im gonna try taking the tank down and seein what i can clean and fix for little money. that darn haynes book aint worth the paper its printed on cause it doesnt go over the fuel stuff that much. can anyone help me?
please!!!!!!!!!

Russell · 06-10-2003, 10:54 PM

Probally just need to recalibrate the fuel gauge, how? Don't ask me!

*rage'nrat638* · 06-10-2003, 11:01 PM

make sure its got a good ground

bpmcgee · 06-11-2003, 02:41 AM

Fire,

A sender which has no ground will read over full. So if yours isn't reading high enough, it probably would NOT be a ground problem. May be a bad sender unit?

Brian

Prerunner1982 · 06-11-2003, 06:15 AM

might as well check ground anyways. mine read 1/4 over F for a few days. then went back to normal. then eventually it read E for empty but 3/8s for full.

scalawag · 06-11-2003, 07:28 AM

when i first got my truck i had troubles with the gauges.

take out the gauges. take some sandpaper and stick in the contacts where the gauge posts go. that will get a good contact on the gauges. second remove the plastic gauge holder, pull out the big plug on the circuit board and clean all the contacts with a pencil eraser. dab a little bit of elecrical grease on it. if that dont fix it. you got a bad sender.

MIKE'67 · 06-11-2003, 10:40 AM

I had the same problem with my '67. I found that the float had developed a small crack allowing gas to enter. This made the float arm too heavy to rise to the full mark. I replaced that and it works fine now.

79BIG10 · 06-11-2003, 06:51 PM

I agree. It sounds like the float.

06-10-2003, 10:14 PM	#1
firemedicsafd Registered User Join Date: Dec 2002 Location: Jacksonville, Florida Posts: 110	fuel guage my fuel guage reads 1/4 full when its close to empty and about 3/8 when its totally full. whats the problem? im gonna try taking the tank down and seein what i can clean and fix for little money. that darn haynes book aint worth the paper its printed on cause it doesnt go over the fuel stuff that much. can anyone help me? please!!!!!!!!!

06-10-2003, 10:54 PM	#2
Russell Professional Grade Join Date: May 2003 Location: Fort McMurray, Alberta Posts: 7,915	Probally just need to recalibrate the fuel gauge, how? Don't ask me! __________________ 1995 Chevrolet 2 Door Tahoe (6.6L LBZ Duramax / ZF6 / NP241 with 1 ton solid axle swap)

06-11-2003, 06:15 AM	#5
Prerunner1982 Registered User Join Date: Oct 2002 Location: Edmond, OK Posts: 5,904	might as well check ground anyways. mine read 1/4 over F for a few days. then went back to normal. then eventually it read E for empty but 3/8s for full. __________________ Jon 1982 Chevy Silverado 350/th350.... RETIRED 1993 Jeep XJ 2 door(Cherokee) 4wd 4.0ltr/AX-15 (5spd)/NP231 .... Oklahoma Roll Call

06-11-2003, 07:28 AM	#6
scalawag Registered User Join Date: Aug 2002 Location: caledonia ms Posts: 260	hi man when i first got my truck i had troubles with the gauges. take out the gauges. take some sandpaper and stick in the contacts where the gauge posts go. that will get a good contact on the gauges. second remove the plastic gauge holder, pull out the big plug on the circuit board and clean all the contacts with a pencil eraser. dab a little bit of elecrical grease on it. if that dont fix it. you got a bad sender.

06-11-2003, 10:40 AM	#7
MIKE'67 Registered User Join Date: Nov 2001 Location: Albertville, Alabama USA Posts: 299	I had the same problem with my '67. I found that the float had developed a small crack allowing gas to enter. This made the float arm too heavy to rise to the full mark. I replaced that and it works fine now. __________________ 1977 Short Stepside, black, 350/350. Located in Albertville, Alabama.

06-10-2003, 11:01 PM	#3
rage'nrat638 Account Suspended Join Date: Mar 2003 Location: THE FALL GUY CHICAGO IL Posts: 5,883	make sure its got a good ground

06-11-2003, 02:41 AM	#4
bpmcgee Registered User Join Date: Mar 2003 Location: Northern Illinois Posts: 2,181	Fire, A sender which has no ground will read over full. So if yours isn't reading high enough, it probably would NOT be a ground problem. May be a bad sender unit? Brian

06-11-2003, 06:51 PM	#8
79BIG10 I'm back with 2nd truck! Join Date: Feb 2002 Location: Texas Posts: 3,774	I agree. It sounds like the float. __________________ 1979 Chevrolet Bonanza Big10 "Tootsie Roll" 1985 Chevrolet Silverado (wife's) Member of the Southern Bowties Club "Don't underestimate how sexy a fat man who drinks to excess can be." Homer Simpson



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