I have a 2000 Oldsmobile Alero. Whenever my gas gauge gets to about 3/4 tank, my car acts as if it is out of gas. I know my fuel gauge is working and that my car has gas. I was told that it was most likely the fuel pressure regulator valve so I had that replaced but it hasn’t helped at all. Is it my fuel pump? Or what else could it be?
It’s time for a mechanic to test and diagnose it. There are lots of guesses and parts that could be replaced like even a filter.
My guess would be a dying fuel pump. With a dying pump, the weight of the fuel can assist it until it gets low, and then the weakness becomes evident. But guessing isn’t necessary. The fuel pump is easy to test.
Post back with the results.