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

cameyer · 08-24-2013, 02:29 PM

So I have finally finished installing my under bed gas tank from lmc and have it filled up however I have found the gas gauge bounces around a lot. Since my gas guage never work I don't know if this is normal for this truck so hopefully some one can help. The gauge fluctuates as much a quarter of a tank when I go over bumps
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*Sharps40* · 08-24-2013, 03:49 PM

Normal. Enjoy it, it works!!!!! Gotta buy 2013 cars for a steady gas gauge.

NCD1966 · 08-24-2013, 05:12 PM

i'll take a bouncy one anyday; mine just pegs out pass full all the time.

its not an old sending unit and its not stuck either (i checked)
not sure whats the deal

VonDog · 08-24-2013, 05:49 PM

Quote:

Originally Posted by NCD1966

i'll take a bouncy one anyday; mine just pegs out pass full all the time.

its not an old sending unit and its not stuck either (i checked)
not sure whats the deal

Sounds like the contact inside the sending unit control box is stuck! I yanked mine out cuz it didn't work at all and found that the box had broken open and the copper inside the wasn't making contact so I soldered it back together, made sure the contact was positioned right, and soldered the small box back together, installed and everything works now. Good luck!

**yelmer** · 08-24-2013, 06:41 PM

some of the after market sending units use the wrong ohms? current to the gauge . if you can find a original good unit might be the way to go if you are having problems .

*Sharps40* · 08-24-2013, 06:44 PM

Quote:

Originally Posted by NCD1966

i'll take a bouncy one anyday; mine just pegs out pass full all the time.

its not an old sending unit and its not stuck either (i checked)
not sure whats the deal

Maybe 0 to 90 ohm sender on a 0 to 30 ohm gauge....?

61_FL_Apache · 08-24-2013, 06:48 PM

When it stops bouncing, that means to look for a gas station.... QUICK!!

cameyer · 08-24-2013, 07:05 PM

The sending unit is brand new. I didn't look very closely at it just popped it in should u take it out an examine it? I have the bed off right now so I'm trying to get everything perfect before the bed goes back on
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VonDog · 08-24-2013, 08:25 PM

I would pull it before you put the bed on and check it with a meter while you work the float!

jtrichard · 08-24-2013, 10:43 PM

NCD 66 ...with the key/INJ. on ground out the wire at the sending unit and see if dash gauge goes to E if it does then its the sender if it still stays at F then you have an "open" wire to the dash gauge

hotrodder · 08-25-2013, 02:27 PM

Does the tank have a baffle in it? The fuel sloshing around can cause the float to bob around until it settles down.

08-24-2013, 02:29 PM	#1
cameyer Registered User Join Date: Sep 2012 Location: santa cruz california Posts: 89	Bouncing gas guage So I have finally finished installing my under bed gas tank from lmc and have it filled up however I have found the gas gauge bounces around a lot. Since my gas guage never work I don't know if this is normal for this truck so hopefully some one can help. The gauge fluctuates as much a quarter of a tank when I go over bumps Posted via Mobile Device

08-24-2013, 03:49 PM	#2
Sharps40 Account Suspended Join Date: Oct 2012 Location: here Posts: 2,408	Re: Bouncing gas guage Normal. Enjoy it, it works!!!!! Gotta buy 2013 cars for a steady gas gauge.

08-24-2013, 05:12 PM	#3
NCD1966 Registered User Join Date: Jun 2010 Location: Lafayette , La Posts: 404	Re: Bouncing gas guage i'll take a bouncy one anyday; mine just pegs out pass full all the time. its not an old sending unit and its not stuck either (i checked) not sure whats the deal __________________ 1966 Chevy C10 Stepside 355ci sbc with 3speed OD 2021 GMC Sierra 1500 AT4 6.2 1980 Chevy Camaro z28 383ci 1990 Chevy Suburban 350 tbi 2x4 (sold) 1984 Chevy C10 sliverado short fleet 1997 Chevy C1500 short fleet

08-24-2013, 06:41 PM	#5
yelmer Registered User Join Date: Aug 2008 Location: greeley colorado Posts: 1,360	Re: Bouncing gas guage some of the after market sending units use the wrong ohms? current to the gauge . if you can find a original good unit might be the way to go if you are having problems .

08-24-2013, 06:48 PM	#7
61_FL_Apache Who Me? Join Date: Sep 2010 Location: Royal Palm Beach, FL Posts: 4,067	Re: Bouncing gas guage When it stops bouncing, that means to look for a gas station.... QUICK!! __________________ Steve 1997 Tahoe LT 4D 2WD (DD) 2001 Blazer 4D 2WD 1961 Apache 10 (sold) 1965 C10 Stepper (sold)

08-24-2013, 07:05 PM	#8
cameyer Registered User Join Date: Sep 2012 Location: santa cruz california Posts: 89	Re: Bouncing gas guage The sending unit is brand new. I didn't look very closely at it just popped it in should u take it out an examine it? I have the bed off right now so I'm trying to get everything perfect before the bed goes back on Posted via Mobile Device

08-24-2013, 08:25 PM	#9
VonDog Registered User Join Date: Jul 2013 Location: Phoenix, AZ Posts: 348	Re: Bouncing gas guage I would pull it before you put the bed on and check it with a meter while you work the float!

08-24-2013, 10:43 PM	#10
jtrichard Registered User Join Date: Jun 2013 Location: joshua tree ca. Posts: 1,484	Re: Bouncing gas guage NCD 66 ...with the key/INJ. on ground out the wire at the sending unit and see if dash gauge goes to E if it does then its the sender if it still stays at F then you have an "open" wire to the dash gauge

08-25-2013, 02:27 PM	#11
hotrodder Registered User Join Date: Oct 2011 Location: Bloomington Indiana Posts: 322	Re: Bouncing gas guage Does the tank have a baffle in it? The fuel sloshing around can cause the float to bob around until it settles down.

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