Can a Gas Gauge be calibrated?

[JPOutfitters]

My gauge shows 1/4 when my Burb is empty and shows about 1/4 past full when it is full!

Can this be corrected? It started doing this when I had someone change out the fuel pump in the tank and thinking it's because he bent something when putting the sending unit back into the tank.....

 

[4X4HIGH]

The Rheostat in the sender is bad. GM senders are 0-90 ohm so if you pull the sender you can check that it reads as such and if not then it's time to replace the sender.

 

[kdoske]

You should just buy a new sender because your potentiometer in your current sender is obviously failing. To answer your question though you could do 2 things.

• Use an op amp as a transconductance converter to reduce the resistance of your fuel sender linearly by 25% across the board.
• Use a resistor in parallel to the fuel sender signal wires to reduce it by 20% on the low side. Doing this would make your gauge show on the E line when empty but it would still go past the F Line when full.

Obviously doing either would take tons of time on your part to figure it out and determine what resistors you need to make it work.

 

[Blue85]

If it's always off by 1/4 tank, just fill it up, pull the needle and glue it back on pointed at full.

 

[Jessie James]

If it's always off by 1/4 tank, just fill it up, pull the needle and glue it back on pointed at full.

I was going to say that.

 

[kdoske]

Whaaaa, and mess up the gauge!!!! CRAZY