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Old 08-11-2009, 06:47 PM   #1
Gammar

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Default How to check gas tank level???

What would be the best way to check your gas tank level when ur gas gauge dont work on a 1981 cutlass?

I know i seen ppl use like a stick to see how much is in the tank on older trucks.
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Old 08-11-2009, 07:44 PM   #2
matt69cutlass

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Default Re: How to check gas tank level???

does the gauge work at all? Does it read completly full or empty? If I remember correctly the fuel sender wire is tan. With it disconnected the gauge will read full. Ground it and the gauge will read empty. Check the ground, if its not good the gauge wont read correctly. If the ground is good and the gauge works correctly when checking the tan wire you need a sending unit.
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Old 08-11-2009, 08:13 PM   #3
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Default Re: How to check gas tank level???

If the gauge/wiring system is f*cked it's easy to check....shove a dowel rod down there and see how far it gets wet. You'll get used to it quick.

If you want to fix the guage, ground it out. The needle should go all the way over.....then ground out the wire by the fuel tank, with the key in the on position. if the needle goes all the way over, the wire to the sender is good. Check the grounds first....its easy.

If the gauge doesn't change when you ground it...either the gauge or the wire is bad....
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Last edited by IIIQuaZIII : 08-12-2009 at 11:23 AM.
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Old 08-12-2009, 08:27 AM   #4
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Default Re: How to check gas tank level???

Drive it till the car stalls and wont start....then its empty.
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Old 08-12-2009, 08:41 AM   #5
FE3X CLONE

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Default Re: How to check gas tank level???

Quote:
Originally Posted by matt69cutlass View Post
If I remember correctly the fuel sender wire is tan.
Fuel sending wire is pink. At least on the G-body's. Tan would be the oil sender wire.
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Old 08-12-2009, 09:02 AM   #6
matt69cutlass

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Default Re: How to check gas tank level???

I stand corrected! Doh!! Not sure what I was thinking.
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69 Cutlass, 455/ Edelbrock heads,11.71 @114 grocery getter,gotta get the ice cream home before it melts!

06 2500 4X4 Mega Cab 5.9 Cummins daily driver love everything about it

Turbo lag= that brief moment in time your competition thinks he is winning!

I tell my wife if I didn't do the car thing Id take up drinking! Everyone has to have a hobby!

My vehicles are assembled with wrenches.....not chopsticks!
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Old 08-12-2009, 01:18 PM   #7
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Default Re: How to check gas tank level???

Drove a car like this my entire ownership. Every 100 miles I filled the tank. If I lost track I would push down on the trunk listen for the slosh and fill up ASAP. Worked out fairly well, did make an attempt at fixing it but overall it didn't really bother me.
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Last edited by one442 : 08-12-2009 at 01:20 PM.
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Old 08-12-2009, 01:25 PM   #8
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Default Re: How to check gas tank level???

Quote:
Originally Posted by 70W-32 View Post
Drive it till the car stalls and wont start....then its empty.
Been there, done that. That is how I figured out the one on my 86' was stuck, I couldn't figure out how I was getting such good gas mileage
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