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Gas guage goes from 3/4 to past full

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Old Jan 16, 2008 | 11:47 PM
  #1  
Hunnicuttz's Avatar
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From: Florida
Car: 1992 Formula
Engine: 5.7 350
Transmission: 700R4
Gas guage goes from 3/4 to past full

On my 92 formula the gas guage is messing up. When the tank is empty the gas guage shows that it is at 3/4 but when i fill it up it goes Past the full mark. Why is it doing this? should i just adjust the needle?
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Old Jan 17, 2008 | 05:52 AM
  #2  
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From: Lawrence, KS
Car: Met. Silver 85 IROC/Sold
Engine: 350 HO Deluxe (350ci/330hp)
Transmission: T-5 (Non-WC)
Axle/Gears: Limited Slip 3.23's
Re: Gas guage goes from 3/4 to past full

Typical problem on our cars. Try a search for a ton of info.

JamesC
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Old Jan 17, 2008 | 06:14 AM
  #3  
impaled's Avatar
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Car: 1985 Camaro and 1996 Mustang GT
Engine: 350 4bbl/281
Transmission: 700R4/4R70W
Axle/Gears: 9" rear/8.8" 4.10
Re: Gas guage goes from 3/4 to past full

my car just stays at 3/4. i will do some searching.
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Old Jan 17, 2008 | 01:04 PM
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Hunnicuttz's Avatar
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From: Florida
Car: 1992 Formula
Engine: 5.7 350
Transmission: 700R4
Re: Gas guage goes from 3/4 to past full

I have done some searching but most of the info I have found is that everyones needle is stuck at one point and doesn't move.
Mine actually moves but goes past full when I fill it up and goes as far down as 3/4 when completly empty. so it is kinda working but it bothers me that it isn't set right. I was thinking that if I take it apart That maybe all i need to do is reposition the needle, or would it just go back to where it is now? any thoughts?
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Old Jan 17, 2008 | 01:28 PM
  #5  
AMigs87IROCz's Avatar
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From: Rhode Island
Car: 1987 Iroc-z
Engine: Swapped into a 350TPI
Transmission: T-56 Six Speed
Axle/Gears: Moser 12 Bolt 3:42 Gears
Re: Gas guage goes from 3/4 to past full

In my camaro I run in to that problem. Does yours also...start with a 1/2 tank, hit the throttle and you've got 1/4 tank-hit the brakes and now you've got nearly a full tank.
Yea-if anyone has a tip/trick...let me in!!!!
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Old Jan 17, 2008 | 01:35 PM
  #6  
Hunnicuttz's Avatar
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From: Florida
Car: 1992 Formula
Engine: 5.7 350
Transmission: 700R4
Re: Gas guage goes from 3/4 to past full

Originally Posted by AMigs87IROCz
In my camaro I run in to that problem. Does yours also...start with a 1/2 tank, hit the throttle and you've got 1/4 tank-hit the brakes and now you've got nearly a full tank.
Yea-if anyone has a tip/trick...let me in!!!!
No mine doesn't do that.
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Old Jan 17, 2008 | 02:16 PM
  #7  
JamesC's Avatar
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From: Lawrence, KS
Car: Met. Silver 85 IROC/Sold
Engine: 350 HO Deluxe (350ci/330hp)
Transmission: T-5 (Non-WC)
Axle/Gears: Limited Slip 3.23's
Re: Gas guage goes from 3/4 to past full

The problem is usually associated with sender. A quick search found the following link:

https://www.thirdgen.org/forums/tpi/...der+gauge+fuel

JamesC

Last edited by JamesC; Jan 17, 2008 at 02:19 PM.
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Old Jan 17, 2008 | 02:49 PM
  #8  
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From: Fairhope, AL
Car: 89RS(other cars & pics in vBgarage)
Engine: LO3, 305 TBI Mildly Modified
Transmission: BakerBuilt 700R4 w/B&M Megashifter
Axle/Gears: 3.23 Auburn Pro Series LSD
Re: Gas guage goes from 3/4 to past full

i thought that 90% of camaros once you got somewhat past F like at 3/4 it would dive down when you hit brakes and go up when you gas it (not a huge movement but some)
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Old Jan 17, 2008 | 03:01 PM
  #9  
impaled's Avatar
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Joined: Nov 2006
Posts: 504
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Car: 1985 Camaro and 1996 Mustang GT
Engine: 350 4bbl/281
Transmission: 700R4/4R70W
Axle/Gears: 9" rear/8.8" 4.10
Re: Gas guage goes from 3/4 to past full

my old 87 camaro would be at half, go up to full upon acceleration and 1/4 on braking. at least you have a remote idea of how much fuel you have compared to it just staying at 3/4
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