Fuel tank gas gauge is constantly moving from full to empty?

Tiny
CHEVYOY33123
  • MEMBER
  • 2000 BUICK REGAL
  • V8
  • FWD
  • AUTOMATIC
  • 169,800 MILES
My fuel tank gas gauge is constantly moving from full to empty and I can never tell how much gas I have in the tank. And I want to know what might the problem be?
Monday, April 20th, 2009 AT 9:49 PM

1 Reply

Tiny
SQM
  • MECHANIC
  • 6,383 POSTS
Hello,

Sounds like either the fuel sending unit in the fuel pump is defective or the gauge cluster is faulty.
Do you have issue with any other gauges? or just the Fuel level gauge?
If that is the case then it is more likely the fuel sending unit. Which has a float that tells the amount of fuel in the tank.

Here is a helpful article:

https://www.2carpros.com/articles/how-to-replace-an-electric-fuel-pump

I have also attached replacement procedure for the sending unit.

Let me know if you have any questions.

Thank you.
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Friday, July 16th, 2021 AT 10:51 AM

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