So when i fill up to a full tank of gas and drive it around, by the end of the day it already shows that i have wasted a quarter tank. The next morning when i turn the car back on it shows that i have only used an 1/8 of a tank. After a few days of going back and forth between how much gas is in my tank, i end up at having only 1/4 of a tank left. I keep driving and driving and it still says i have a 1/4 tank left, then next thing you know, i stall because i am out of gas (the reason i know that it is because i was out of gas because as soon as i put in some gas it started right up and i went to the gas station). So apparently it doesn't give me the right amount of gas i have in my gas tank and neither does it let me know when i am starting to run on empty. What could be the problem?? Should i replace my fuel pump because that's where the sensor is? Or could it be the stock gas gauge?

Also for reference, when i got the car back from the shop a while ago, the big tube leading to the gas tank (all underneath the car) was disconnected. I barely got it on because it was a tight squeeze but maybe it isn't on far enough and there's air leaking or something so that the pressure can't be measured correctly?? I just dunno anymore..

 

What was the car in the shop for? Did rhey do any work on the fuel system?

Fuel level in the tank is measured by two floats.

 

Just had the same problem yesterday - had to tow the car and then the shop removed the fuel pump but couldn't find any fault - looked in the tank - EMPTY!!!

Put $20 fuel in and away she goes....

Any clues on this yet??