Fuel Pump Getting Power But Not Working

Fuel Pump Getting Power But Not Working

Fuel Pump Getting Power But Not Working

If you notice that your fuel pump is receiving power , but isn’t working it could be due to some possible reasons:

  1. A malfunctioning fuel pump: It’s likely that the fuel pump is failing and must be replaced. Even if it’s running however, it may not be working properly.
  2. Filter for fuel that is blocked: A fuel filter that is blocked could block fuel from reaching the pump, even when it is receiving power. This could cause the pump to fail.
  3. Electrical or wiring issues: There might be problems with the electrical or wiring connections that connect to the fuel pump. This could result in the pump stop working even though it is receiving electricity.
  4. Failure of the fuel pressure regulator: If the regulator for the fuel pressure is malfunctioning, it may not allow the proper amount of pressure from the fuel tank to enter the pump. This could cause it to not work correctly.

To identify the problem You may need to speak with an auto mechanic or mechanic to conduct additional tests and examinations to determine the root of the issue.

Reasons why Fuel Pump is Getting Power But Not Working

1. The plug For The Pump May Lose Its Springiness

The fuel pump is fitted with the connector end or plug. In general, they are pin or spade designs. However, the female ends can decrease their springiness as time passes. Ultimately, they bend in a few places and do not have a good grip.

The result is the fuel pump isn’t able to get the voltage that it needs to turn through the test with a multimeter that says there’s enough power.


I would suggest you poke the leads’ pointed ends before conducting tests. To do this, it is necessary to disengage them from the house that houses the connector. Then, simply slide the leads out by depressing the plastic tabs.

Clean the leads and compress them slightly with gentle pressure. Now they’ll be in good contact and provide the power the fuel pump needs. If they don’t provide any luck, then you need to find an alternative connector end which can be found at the auto repair stores.

2. Problem With The Return Side Of The Circuit

Some cars control the operation of the fuel pump from both sides of the circuit. If there’s any issue with the return portion of the circuit, the fuel pump will not function, even if it receives energy.


You cannot be certain that the return portion in the circuit could be in trouble without examining the circuit electrically. You must possess an instrument such as a multimeter to check the circuit. After that, you can watch this instructional video and learn how to check Earth connections.

When both ends (the wire that connects to the pump and that connecting to the ground) have voltage, I would guess that the circuit’s return circuit is the problem. It is recommended to hire an electrician to resolve this electrical problem.

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3. The fuel Pump Motor Is At Fault

A good fuel pump will provide a reading of 12 VDC. It should be able to run at this level of voltage. The problem is that it is supposed to bind, and the amperage in the circuit isn’t enough to make the motor turn.

If you attach the motor for the fuel pump straight to your battery, it’ll spin. But the test is when the motor runs in a circuit specifically designed for it. If the circuit works, you can change the motor in the fuel pump.


If you wish for your fuel pump to have power, you must replace the damaged motor of the fuel pump. Alternatively, you can contact an expert mechanic to complete the task for you, even if you’re not an expert in mechanical work.

What Can Cause A Fuel Pump To Not Get Power?

There are a variety of reasons that can be responsible for stopping the power supply to the fuel pump. In this article, we will discuss why the pump’s fuel supply lost no power.

Electrical Issues

If there is no electrical energy in the fuel pump, the first assumption is that it’s the electrical system in the automobile. For example, the fuses that power the main EFI ignition and fuel pump could blow out. They could cut off the power supply for the pump.

Faulty Ignition Circuit

A malfunctioning ignition circuit in your vehicle can be a reason to be concerned. The ignition circuit comprises several components, including an ignition switch, fuel pump, and relay. If there’s a fault with these components or with the wiring, the fuel pump won’t be able to receive electricity.

Bad Fuel Pump Relay

A malfunctioning fuel pump relay can cause the engine to have no power. The relay that controls the fuel pump can fail for various reasons. A surge in electrical power is one reason that can increase voltage and can cause a fire to the contacts. In the end, the fuel pump does not receive energy.

How To Check If The Fuel Pump Is Getting Power?

Follow these steps to find out how to test for fuel leaks:

  • Find the fuel pump wiring. You will find over two cables. The longer wires are used and designed for those who are fuel pumps.
  • It is within the fuel tank. It is best tested using the connector left on and using a paperclip to insert the connector.
  • Select one of the meters that connects to an earth point and turn the engine. You will see the battery’s voltage on the live wire and just less than half of a volt on the Negative wire. If you can’t detect voltage from the live wire’s battery, check the relay and wiring.

Does The Ignition Switch Affect Your Fuel Pump?

An ignition switch supplies electric power for the pump and the ignition system for a short period when it is set in the position of cranking. If it is damaged, it will stop the power supply for the pump.

What Is The Source Of Power For The Pump That Pumps Fuel?

Fuel pumps are an essential element of the vehicle’s fuel system. It is responsible for transferring fuel from the tank into the engine. If you don’t have a working fuel pump in place, it will not get the fuel required to function, which could cause inadequate performance or an engine malfunction.

One of the crucial elements of a fuel pump’s operation is the power source. The fuel pump requires an ongoing and stable power source to function properly. This article will examine what powers the fuel pump and how it functions.

Types Of Fuel Pump Power Sources

Two main kinds of power sources are used by fuel pumps: electrical and mechanical.

Mechanical fuel pumps can be used in older vehicles and utilize a mechanical lever to transfer gasoline from the tank into the. These fuel pumps are generally driven by a crankshaft or camshaft that provides the required mechanical force to control the pump.

However, the majority of modern vehicles utilize electric fuel pumps. This is because they operate on electrical power and depend on a constant power supply to function properly.

How Electrical Fuel Pumps Work?

Electric fuel pumps are usually situated in tanks for gasoline. The pumps connect to the electrical system in the vehicle and are managed by the Engine Control Unit (ECU). The ECU transmits a signal to the fuel pump relay, which sends energy to the fuel pump.

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The fuel pump comprises two main components: an engine and a pump. The motor rotates a shaft which is driven by the pump. The pump produces a suction effect, which draws gasoline from the tank and moves it through the fuel lines to.

Most electrical fuel pumps are engineered to operate at a certain voltage, usually 12 volts. The relay for the fuel pump is accountable for ensuring the pump receives the proper quantity of energy. If the relay malfunctions, it could mean that the pump does not receive sufficient power to operate properly, resulting in an inefficient engine or complete engine malfunction.

Common Fuel Pump Power Problems

There are a variety of issues that can lead to fuel pump power issues. Most often, the problem is caused by a defective motor relay. If the relay is damaged, the relay will not send the energy to the pump that is needed, leading to an unresponsive or hard-starting condition.

Another common issue is a fuse that has blown. For example, if the fuse that controls the fuel pump has been blown, it won’t be able to receive power, which means that the engine will not begin.

In some instances, wiring problems can result in power issues for the fuel pump. For example, if there’s a short or a short in the wiring that connects the relay for the fuel pump and the pump, it cannot receive power, resulting in a”no-start” situation.

What Is The Sensor That Controls Your Fuel Pump?

A fuel pump is an important component of the vehicle’s fuel system. It’s which is responsible for the delivery of fuel from the tank into the motor. Fuel pump operation is usually controlled by a sensor designed to measure the pressure of the fuel and ensure that the pump is working properly. In the following article, we’ll look at the different kinds of sensors that could be utilized to regulate the operation of the pump.

1. Fuel Pressure Sensor

The sensor for fuel pressure is among the most commonly used sensors for controlling the fuel pump. The sensor measures the fuel pressure within the fuel system and transmits a signal to the engine control module (ECM) when the pressure falls below a specific level. When the ECM gets this signal, it transmits a signal to the relay for the fuel pump to switch on it. The fuel pump.

The sensor for the fuel pressure is normally situated near the fuel rail and is linked to the fuel system by a pipe. It functions through a diaphragm subjected to the pressure of the fuel, and when the pressure changes, it transmits a signal for the ECM.

2. Fuel Level Sensor

The sensor for fuel level is an additional type of sensor that can be used to regulate your fuel pump. The sensor measures the fuel inside the gas tank and transmits an indication for the ECM when the fuel level is below a certain point. When the ECM detects this signal, it transmits a signal to the relay that controls the fuel pump to switch on it. The fuel pump.

The fuel level sensor is typically located inside the gas tank. It operates with a float that is connected to an adjustable resistor. As the fuel level fluctuates, the float is moved either up or down, thereby altering the resistance of the resistor. The resistor then transmits a signal back to the ECM.

3. Crankshaft Position Sensor

The crankshaft’s position sensor is an additional sensor regulating the engine’s fuel pump. The sensor is made to track the crankshaft’s position and transmit an alert for the ECM if the engine is cranking or running. When the ECM receives this signal, it will send a message to the relay for the fuel pump to switch up the engine’s fuel pump.

The sensor for the crankshaft’s position is usually located close to the crankshaft. It functions by using a magnetic field affected by the crankshaft’s teeth. When the teeth pass through this sensor, it transmits an electrical signal sent to ECM.

Can A Fuse Make A Fuel Pump Unable To Function?

A blown fuse can cause a fuel system to stop working. The fuel pump circuit in most automobiles has a safety fuse within the fuse box. If the fuse that protects the fuel pump is blown and the fuel pump is damaged, it cannot receive the power it needs and won’t be able to operate.

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The Ignition Switch Can Affect The Pump That Pumps Fuel?

The ignition switch can impact the pump that pumps fuel. In most vehicles, your fuel pump will be controlled by the vehicle’s computer, which can receive signals from different sensors to decide when to start the pump. The most important sensor the computer relies on is the ignition switch.

It is accountable for managing the electricity flow to the vehicle’s electrical system. For example, when you press the button on your ignition switch, it transmits an electronic signal to the computer to start the engine. It also transmits energy to different components like the fuel pump.

When the ignition switch is defective or not working properly, it could stop your fuel pump from receiving power, which can hinder the engine’s start-up. In some instances, the malfunctioning ignition switch can also result in intermittent issues that cause the fuel pump may operate and, at other times, not according to the setting of the key inside the ignition.

Additionally, the ignition switch could be a source of the interference with the anti-theft system within the vehicle, which could stop the pump for fuel from starting. Most modern vehicles come with an anti-theft device that requires a specific key or code to begin the engine. If an ignition switch isn’t accepting the key or code, it could stop it from starting even though the switch is operating properly.

It’s important to note the switch for ignition is only one of the many parts that could affect the pump’s functioning. Other causes for the failure of the fuel pump include a burned fuse, an inoperative fuel pump relay or a blocked fuel filter, or a defective fuel pump. Therefore, it’s essential to get a professional diagnosed with the issue to pinpoint the precise cause of the issue.


What gives a fuel pump power but fails to function?

A faulty fuel pump relay, a clogged fuel filter, a defective fuel pump, or damaged fuel pump wiring could cause a fuel pump to have power but not function.

How can I determine whether the fuel pump is broken?

By turning the key to the ON position without starting the engine and listening for a humming sound from the fuel pump, you can determine if the pump is not operating properly. The fuel pump might not be operating properly if there is no humming sound. You can also check the fuel pressure at the fuel rail with a fuel pressure gauge. A faulty fuel pump could be the cause of low or no fuel pressure.

Can I drive my car if the fuel pump is broken?

It isn’t prescribed to drive your vehicle with a flawed fuel siphon as it might make the motor slow down, fizzle, or not start by any means. Getting the problem fixed as soon as possible is best.

What can I do to fix a fuel pump that is generating power but not functioning?

The solution for a fuel pump that is getting power but isn’t working depends on the problem. The fuel pump relay may need to be replaced if it is the problem. It may be necessary to replace the fuel filter if it is the result of a clogged filter. It may be necessary to replace the fuel pump if it is the result of a broken one. The fuel pump’s wiring may need to be fixed or replaced if it’s the problem.

Can I manually repair a fuel pump that is generating power but not operating?

If you have the necessary mechanical skills and tools, you can fix a fuel pump that is getting power but isn’t working. However, a professional mechanic is recommended because diagnosing and fixing the problem may necessitate some technical expertise.

How much does it cost to fix a fuel pump that has power but doesn’t work?

The problem’s root cause and the cost of new parts will determine how much it will cost to fix a fuel pump that keeps getting power but doesn’t work. Parts and labor can cost anywhere from $300 to $1,000 on average.