Gas Guage problem - Chevelle Tech
Electrical & Wiring Troubleshooting electrical problems.

 
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post #1 of 9 (permalink) Old Nov 25th, 13, 2:05 PM Thread Starter
Glen
 
Join Date: Nov 2013
Location: Wisconsin
Posts: 6
Gas Guage problem

My working gas gauge on my 70 ss now reads past over full and does not move even with the key off. I disconnected the gauge fromthe circuit board but still stays at way over full. Is the gauge shot?
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post #2 of 9 (permalink) Old Nov 25th, 13, 6:41 PM
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Darren
 
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Re: Gas Guage problem

Welcome to the site.. we have beat this one up a few time. Please try the search feature.

https://www.chevelles.com/forums/show...ight=past+full
https://www.chevelles.com/forums/show...ight=gas+gauge
https://www.chevelles.com/forums/show...ight=gas+gauge
https://www.chevelles.com/forums/show...ight=gas+gauge

If you donít push the limits how are you going to find the weak spots?
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My car: 1970 Chevelle

Factory 12 bolt /4-Speed Malibu -Dual stage wet nitrous with heater & purge - Holley Strip Dominator, Speed Demon 750 CFM - (All MSD distributor, blaster 3 coil, 6AL, & 3 stage retard) - 4 wheel disk brakes - Aeromotive Fuel system Ė Boss 338 18ís - BMW 5.25 true HID projector mod - and of course... the FLAPPER - bla, bla, bla.. lots of other expensive stuff I canít remember
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post #3 of 9 (permalink) Old Nov 25th, 13, 6:49 PM
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Ron
 
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Re: Gas Guage problem

You need a new sender.

70 Chevelle SS396 (496) Straub roller, 700r4
69 Malibu convertible (sold)
95 Z28 Convertible T56 6 speed
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post #4 of 9 (permalink) Old Nov 25th, 13, 7:13 PM
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Eric
 
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Re: Gas Guage problem

Or you lost the ground to the sender or the wire from the sender to the gauge is open.

Your just jealous because you can't hear the voices!

1967 Olds Cutlass 468 BBC/T400
1963 Plymouth Fury 440/Torqueflite
2007 Ford Mustang GT (momma's car)
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post #5 of 9 (permalink) Old Nov 27th, 13, 10:09 PM
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Joe
 
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Re: Gas Guage problem

You don't go replacing/guessing until you properly do the troubleshooting.

Basics of basics.

Unplug the TAN wire connection that links the gas tank sending unit to the rear lighting harness in the trunk.

The tan wire "half" that leads into the trunk----touch it to good ground with the key on, fuel gauge should go to EMPTY.

Leave the tan wires disconnected, with the key on, the fuel gauge should go past full. If these conditions are satisfactory, the gauge and wiring leading to rear of vehicle are OK.

Post back if you need more help/next steps to try.

-If you don't stand for something, you'll fall for anything.
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post #6 of 9 (permalink) Old Nov 27th, 13, 10:17 PM
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Darren
 
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Re: Gas Guage problem

I included one or more of your very knowledge responses in the links I provided Joe. Hope he is not a ď1Ē hitter. Seeking information and providing information are both appreciated.

If you donít push the limits how are you going to find the weak spots?
USMC- Retired
My car: 1970 Chevelle

Factory 12 bolt /4-Speed Malibu -Dual stage wet nitrous with heater & purge - Holley Strip Dominator, Speed Demon 750 CFM - (All MSD distributor, blaster 3 coil, 6AL, & 3 stage retard) - 4 wheel disk brakes - Aeromotive Fuel system Ė Boss 338 18ís - BMW 5.25 true HID projector mod - and of course... the FLAPPER - bla, bla, bla.. lots of other expensive stuff I canít remember
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post #7 of 9 (permalink) Old Nov 27th, 13, 10:20 PM
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Joe
 
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Re: Gas Guage problem

Quote:
Originally Posted by 70 nialator View Post
I included one or more of your very knowledge responses in the links I provided Joe. Hope he is not a ď1Ē hitter. Seeking information and providing information are both appreciated.
Yup, I saw that Darren, glad you did that, but sometimes the newbies tend to be easily scared off, so I thought I'd just sum it up quickly. Agreed, hope they come back.


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post #8 of 9 (permalink) Old Nov 28th, 13, 8:21 AM Thread Starter
Glen
 
Join Date: Nov 2013
Location: Wisconsin
Posts: 6
Re: Gas Guage problem

Thanks for the trouble shooting tips. Every thing points to the gauge right now, except.....should there be 12 volts at one of the gauge terminals. I will have to double check but I don't remember if I had any power there


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post #9 of 9 (permalink) Old Nov 28th, 13, 8:29 AM
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Cory
 
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Re: Gas Guage problem

Quote:
Originally Posted by 70 nialator View Post
....Seeking information and providing information are both appreciated.
Best forum on the interweb for that !!!

Many thanks
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