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The fuel gauge will no longer give an accurate reading.
Your fuel gauge is probably reading incorrectly because of a bad fuel level sending unit. There is an access hole for it in the trunk or under the back seat. It is easy to replace and not very expensive.
No, you installing a fuel pump has nothing to do with the fuel gauge
The gauge may be giving you a false reading.
Your fuel sending unit is not giving the correct reading to your gauge
running out of gas
Either your oil pressure gauge is reading low , your engine temperature gauge is reading high , or your fuel gauge is reading low so your almost out of gas
Float in tank is stuck or damaged or installed from the factory incorrectly.
There is none. But you can try disconnecting the wiring attached to the fuel sending unit and look at the fuel gauge. If it is giving you an empty reading, the fuel gauge is faulty and should be replaced.
check wiring at fuel tank where fuel pump is located
Possible broken wire, the fuel pump module is installed incorrectly and the float is hitting the side of the fuel tank.
Check the fuel gauge sending unit, located in the fuel tank. The sending unit could be stuck in the full position.