Has anyone also noticed that when driving on hills it changes? A few days ago I was driving down a really steep hill and the gauge went down from 5/8 to about 1/4, and on the way back up the hill on my return trip it went to full.

-Joe

 

What would you expect to happen with a tank that is much longer than it is wide?

 

lol its kinda obvious this would happen because the gas has to follow gravity and the sensor is in a fixed place >_<

 

My Chevelle's gas gauge would go from 3/4 to E on acceleration! LOL But that was unbuffered.

 

Mine dances around once its under half a tank. I've just sorta gotten used to it and it can wait till the fuel pump goes out.

 

The fuel sender is NOT the only thing that affects the readout on the dash. Grab your wiring diagram and start tracing. Im going to reference a diagram for a 97 blazer. The purple wire from the sensor goes to the fuel buffer module under the glove box. The buffer has it's own power source, inputs, outputs and 5 volt reference voltage. The signal is also sent to the vehicle control module located on the right side of the engine compartment. These magic little boxes analyze and fondle the signal that is eventually sent to the fuel gauge. A flaky gauge is not always cause by a bad sender. Meter the sender out with a VOM and diagnose the problem instead of just throwing parts at it. A wiring diagram, a $10 meter and an hour of time will save you gadzooks of money. Trust me on that one!

 

yes sorry, i used the search first but i miss spelled what i was searching for..

Didn't realize until after i made the thread hehe

 

I just replaced my sending unit with a new one and sure don't trust the gauge. Sometimes the warning light will flash at 1/4 tank and other times at 1/8 which I think is about right. You can replace the sender without replacing the pump. Someone had twisted the outlet tube on mine so when I replaced the pump I just finished it off getting it loose.

 

Ive got the digital dash cluster, and mine reads full for 250km, then drops to half by 375, then empty at 500... ive never tried to see if it will go farther than that, i just fill her up then. I cant rely on my guage it seems. Ive asked other blazer owners who have the digital dash, and they ALL have the same problem with it.

 

I know this topic is old, but is it safe to use Chevron Techron (20 gallon treatment) two tanks in a row? I have a gauge that is like 1/4 of a tank behind (I have below 1/2 a tank now and it is dancing between F and 1/4 sometimes going to 1/2 when the car is stopped with the engine off) and I couldn't help but notice that it only started doing that after I started using Lucas every tank for like 4 tanks and then every other tank until I stopped using it all together a month ago. I have Techron in the gas now and I got to fill it up tomorrow. I don't use much gas because don't drive much around here because it is a small town even when I only get 9-11mpg.