1. The engine cranks but doesn't start. This is the most common sign of a bad fuel pump. When the fuel pump fails, the engine doesn't get any gas and it can't start.
2. The car hesitates or stalls while driving. If your car is hesitating or stalling while driving, it could be a sign that the fuel pump is not delivering enough gas to the engine. This can be dangerous, so it's important to have it checked out as soon as possible.
3. The car idles rough. If your car is idling rough, it could be a sign that the fuel pump is not delivering enough gas to the engine. This can cause the car to vibrate or shake.
4. The car has a low fuel pressure. If you suspect that your car may have a bad fuel pump, you can check the fuel pressure. The fuel pressure should be between 35 and 45 psi. If it is lower than 35 psi, the fuel pump may be bad.
5. The car makes a whining noise when the fuel pump is on. If you hear a whining noise when the fuel pump is on, it could be a sign that the fuel pump is failing. This is a serious problem, so it's important to have it checked out as soon as possible.
