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'94 Cavalier Fuel Gauge Issues?

I've got a '94 Chevy Cavalier with over 225K miles on her. The fuel gauge has always been iffy, but it's really gotten worse. History: In the last month the starter and fuel pump have both been replaced, so wiring and fuel problems don't surprise me. It was at half a tank yesterday, and when I went home, it was bouncing between empty and 1/4 tank. At rest it showed 1/4 tank. I filled it today at lunch ($42 worth- so it should be FULL). When I got back to work it showed it at the 5/8 mark (half way between 1/2 and 3/4). I don't know what's wrong, and obviously can't take it to the mechanic until after the holidays. Can anyone help me, or even give me some instructions on what to look for? Thank you!!! This ol' girl really wants to die, I can tell, but I won't let her!

Update:

I'm not sure if it matters, but it always goes well over the full mark when fueling, and then that first "half" takes forever, but the second "half" goes so fast, just not THIS unusually fast. I'd say a few days trips maybe.

3 Answers

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  • J J
    Lv 7
    7 years ago
    Favorite Answer

    Since the fuel pump and the fuel gauge is in the same unit I'd ask the mechanic who put the fuel pump in to fix it. He doesn't need to know all the details just that it isn't working right.

  • Matt
    Lv 6
    7 years ago

    The gage itself is obviously good. If it was dead, the gage would stay in one position and never move. U probably need a new float. Which means you'll have to drop the fuel tank to replace it

  • 7 years ago

    take the fuel pump out and see if the float level sensor is working right

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