whats up with my F#$#@ fuel gauge - The 1947 - Present Chevrolet & GMC Truck Message Board Network

shrtbx · 09-21-2009, 02:29 PM

I know these trucks dont have the best fuel gauges but im confused. It always seemed to work when it wanted to. As time went on it would be all over the place. Now it just sits all the way past E. I picked up another gauge but is it something other than the gauge?

lowrod65 · 09-21-2009, 03:13 PM

man im having the same problem with my 82, so i hope someone has a fix.

**old Rusty C10** · 09-21-2009, 04:01 PM

its prolly the wire ontop of the sender on the tank you can usually get to the brown wie betweeen the bed and cab just try to jiggle it ans see if the contact is bad

diamondave · 09-21-2009, 05:15 PM

Same problem with my 79... I kicked the tank and it works now... when I have time I will properly check it...

78maliburat · 09-21-2009, 05:59 PM

if its past E its most likely a ground issue

Storm Chaser · 09-21-2009, 06:31 PM

I agree with the bad ground- from the sender to the frame

lowrod65 · 09-21-2009, 08:21 PM

ok heres my problem. when the key is off it shows half full, when i turn the key on it goes past full. any ideas?????

**old Rusty C10** · 09-21-2009, 09:38 PM

on these trucks 99 / 100 times its the wiring ontop of the tank start there and work backwards

78maliburat · 09-21-2009, 09:40 PM

Quote:

Originally Posted by lowrod65

ok heres my problem. when the key is off it shows half full, when i turn the key on it goes past full. any ideas?????

most likely ground also

asphaltburner · 09-21-2009, 10:48 PM

Yo! If the fuel needle is pegged beyong full, you have an open within the circuit. Either a break in the grounding to the truck frame (most common), or a break in the positive electrical supply to the sender. The fuel gauge is supplied with 12v+, a ground, and a lead to the sender. The sender has a lead from the gauge and a grounding lead. Grounds are a problem in this circuit, usually due to corrosion, or road damage. The sender lead can be damaged, or the plugin near the starter can corrode. This may help you track down the open.
Todd.

lowrod65 · 09-21-2009, 11:04 PM

well im off tomorrow so first thing in the morning i will check everything out starting at the tank. thanks for everybodys help.

shrtbx · 09-21-2009, 11:23 PM

Let me know how it goes. As soon as i get some time again im going to check out the wires as well.

lowrod65 · 09-21-2009, 11:32 PM

yeah as soon as i get it figured out i'll post wat the problem actually was and how it was fixed.

09-21-2009, 02:29 PM	#1
shrtbx Registered User Join Date: Feb 2007 Location: los angeles Posts: 202	whats up with my F#$#@ fuel gauge I know these trucks dont have the best fuel gauges but im confused. It always seemed to work when it wanted to. As time went on it would be all over the place. Now it just sits all the way past E. I picked up another gauge but is it something other than the gauge?

09-21-2009, 03:13 PM	#2
lowrod65 Registered User Join Date: Dec 2007 Location: hillsboro tx Posts: 65	Re: whats up with my F#$#@ fuel gauge man im having the same problem with my 82, so i hope someone has a fix. __________________ kill'em all

09-21-2009, 04:01 PM	#3
old Rusty C10 Robert Olson Transport Join Date: Oct 2002 Location: recent transplant to NC USA Posts: 20,310	Re: whats up with my F#$#@ fuel gauge its prolly the wire ontop of the sender on the tank you can usually get to the brown wie betweeen the bed and cab just try to jiggle it ans see if the contact is bad __________________ Bob 1951 International running on a squarebody chassis "If a man's worth is judged by the people he associates himself with, then i am the richest man in the world knowing some of the fine people of this board" http://67-72chevytrucks.com/vboard/a...t.php?f=25&a=9 (you can review the site rules here!) PM Me for your vehicle/parts hauling needs in the North East US or see my Facebook page Robert Olson Transport Live each day to the fullest.. you never know when fate is going to pull the rug out from under you... I hate cancer!!

09-21-2009, 05:15 PM	#4
diamondave Registered User Join Date: Jul 2009 Location: Luverne,Mn Posts: 92	Re: whats up with my F#$#@ fuel gauge Same problem with my 79... I kicked the tank and it works now... when I have time I will properly check it... __________________ Static Dropped 1988 Chevrolet ECLB "Hovering less then 3 inches from the ground... full-time"

09-21-2009, 05:59 PM	#5
78maliburat Registered User Join Date: Jul 2009 Location: cleburne texas Posts: 174	Re: whats up with my F#$#@ fuel gauge if its past E its most likely a ground issue

09-21-2009, 06:31 PM	#6
Storm Chaser Registered User Join Date: Oct 2006 Location: In the Indiana Corn Posts: 449	Re: whats up with my F#$#@ fuel gauge I agree with the bad ground- from the sender to the frame __________________ 1988 R2500 Crew Cab Immediate plans- get it running! Future plans- Rear disc swap & Hydroboost Dually conversion with shackle flip-n-switch 4x4 conversion with 52" springs Maybe some new body panels Who needs a car when they make crew cab trucks?

09-21-2009, 08:21 PM	#7
lowrod65 Registered User Join Date: Dec 2007 Location: hillsboro tx Posts: 65	Re: whats up with my F#$#@ fuel gauge ok heres my problem. when the key is off it shows half full, when i turn the key on it goes past full. any ideas????? __________________ kill'em all

09-21-2009, 09:38 PM	#8
old Rusty C10 Robert Olson Transport Join Date: Oct 2002 Location: recent transplant to NC USA Posts: 20,310	Re: whats up with my F#$#@ fuel gauge on these trucks 99 / 100 times its the wiring ontop of the tank start there and work backwards __________________ Bob 1951 International running on a squarebody chassis "If a man's worth is judged by the people he associates himself with, then i am the richest man in the world knowing some of the fine people of this board" http://67-72chevytrucks.com/vboard/a...t.php?f=25&a=9 (you can review the site rules here!) PM Me for your vehicle/parts hauling needs in the North East US or see my Facebook page Robert Olson Transport Live each day to the fullest.. you never know when fate is going to pull the rug out from under you... I hate cancer!!

09-21-2009, 10:48 PM	#10
asphaltburner Registered User Join Date: Jul 2008 Location: Ault, Colorado Posts: 862	Re: whats up with my F#$#@ fuel gauge Yo! If the fuel needle is pegged beyong full, you have an open within the circuit. Either a break in the grounding to the truck frame (most common), or a break in the positive electrical supply to the sender. The fuel gauge is supplied with 12v+, a ground, and a lead to the sender. The sender has a lead from the gauge and a grounding lead. Grounds are a problem in this circuit, usually due to corrosion, or road damage. The sender lead can be damaged, or the plugin near the starter can corrode. This may help you track down the open. Todd. __________________ '78 3/4 ton 4x4 custom "Todd-built" FRANKENTRUCK!

09-21-2009, 11:04 PM	#11
lowrod65 Registered User Join Date: Dec 2007 Location: hillsboro tx Posts: 65	Re: whats up with my F#$#@ fuel gauge well im off tomorrow so first thing in the morning i will check everything out starting at the tank. thanks for everybodys help. __________________ kill'em all

09-21-2009, 11:23 PM	#12
shrtbx Registered User Join Date: Feb 2007 Location: los angeles Posts: 202	Re: whats up with my F#$#@ fuel gauge Let me know how it goes. As soon as i get some time again im going to check out the wires as well.

09-21-2009, 11:32 PM	#13
lowrod65 Registered User Join Date: Dec 2007 Location: hillsboro tx Posts: 65	Re: whats up with my F#$#@ fuel gauge yeah as soon as i get it figured out i'll post wat the problem actually was and how it was fixed. __________________ kill'em all

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