A few years back my wife got a bad tank of gas in her 1999 Blazer and we had to replace the fuel pump. Ever since then when the gas gets down to a quarter of a tank the engine goes dead when we come to a stop-not every time, but enough to be annoying. It usually cranks right back up without a problem, but not quickly. I've been told it's because of a weak spring in the fuel pump, but yesterday when I filled up I had gas leaking from somewhere around the gas tank. The gas did not come up through the filler. I admit to overfilling the tank because of not being able to use the last quarter of a tank. There doesn't seem to be pressure in the tank. When I take the gas cap off there is no air escaping or entering. Could this all just be because there is a loose connection at the top of the tank, like the filler hose?

 

Might be filler hose clamps or hose, but also check the the o-ring sealing the fuel pump to the tank. Had the same problem of gas pouring out when filling till the gas pump nozzle clicks off. Turns out the o-ring was bad (cheap aftermarket fuel pump replacement from a few years back). As the Captain says AC-Delco or Delphi is the only way to go. You have to drop the tank to replace the o-ring, so why not replace the pump to eliminate future problems.

 

I would first do I fuel pressure/ leak down test first

 

How many gallons does it take when your gage reads 1/4. Also for some reason these things are sensitve to overfilling. The fuel leval sending unit on these gages are problematic. When you come to a stop on a downward facing place you ar running out of gas.

 

I had the fuel pump replaced and found that one of the fittings at the top of the pump was cracked, so it was leaking air. Now it's fine and the "Service Engine Soon" light is out (finally!!).