Driving home yesterday when car cut out while driving. Fuel tank gauge shows over half full but, although car is turning over, it seems that no fuel is getting through. I suspect that the fuel pump has failed but don't know where the fuel pump is located on car. The other possibility is that the car has a safety fuel cut-off system that is faulty??? I've checked fuses and all ok, still no fuel getting through system. Is their a way of checking the fuel pump? Is it possible that the fuel gauge is stuck and I've simply run out of petrol?? (I own a 2002 Hyundai Sonata)
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hi it can really only be two things, first is the fuel sender on the pump inside the tank it could be stuffed or sticking causing a false reading, second it can also be a faulty fuel gauge on the dash.
1999 fuel pumps are located within the gas tank on this model and use a float assembly to send fuel levels to the dash gauge. This is why you may notice that parked on a hill or with sudden stops you car shows a little more or less fuel and then settles. It shouldnt go up and down as drastic as you describe so that makes me feel that the sending unit on the fuel pump is going bad. It looks like a half circle of contacts and as the float arm goes up each contact causes a different reading.. think clock face and clock hands. Watch it carefully now that you have filled it up and note when it gets to same range you were in before. If you see same problem it could be a failure.. if not then its possible a piece of debrs wash causing an intermittent failure. Unfortunately on these models the fuel pump and replacemetn is a lengthy process. You must drain the tank, remove it from vehicle and remove pump. insert new one and then do a pressure check at engine block as these new pumps have to maintain about 90PSI pressure to the fuel delivery system. Its not a weekend DIY fix to do this repair and if you see the issue its best to leave this job to a dealer or reputable service facility.
You weren't low on gas - your fuel tank sending unit is failing and needs replacement. It's inside the tank and usually can be replaced without replacing the fuel pump as well - don't get suckered into that.
sounds like you probably need a fuel level sender. it's located in the trunk on the right hand side attached to the fuel pump. I got one on ebay for about 20.00, but you might as well replace the fuel pump while you're at it, as it can go bad with time.