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Fuel Pumps

Fuel Pumps

A fuel pump is a part of automobiles that distributes liquid from the fuel tank to the internal combustion car's carburetor or fuel injector. Carbureted engines typically have low-pressure mechanical pumps installed outside the fuel tank. In contrast, fuel-injected engines typically have electric fuel pumps installed inside the tank (and some fuel-injected engines have two fuel pumps. One low-pressure/high-volume supply inject in the tank and one high-pressure/low-volume pump on or close the engine).

For the motor to work properly, the fuel pressure must be within particular limits. The vehicle will run bumpy and thick if the fuel pressure is too high since it will not consume all of the gasoline being pushed, leaving the machine unproductive and dirty. The engine may run dry, backfire, or stall if reduced pressure.

The engine does not always need the use of a gasoline pump. A carbureted engine's low-pressure gasoline can be provided simply by raising the tank above the carburetor and letting gravity supply the fuel.

What are the symptoms of a bad fuel pump?

Car Won't Start

The vehicle will not operate if the fuel pump cannot deliver gasoline from the fuel tank to the motor. The pump does not supply enough fuel in such circumstances, making it more difficult to ignite and drive the vehicle. This is a very typical and similar symptom of a failing fuel pump.

The old pump struggles to acquire pressure in this situation, and the engine burns out of fuel. Your automobile may not start due to fuel alternator, starter, filter, or battery issues.

Fuel Tank Noise

If you hear loud screaming coming from the fuel tank, it means your fuel pump is broken. The breakdown of the pump bearings could cause this noise.

The pump can also make a lot of noise if the fuel is polluted or there isn't enough fuel in the tank. There is no or very little noise if your pump is working properly. Excessive loudness is a sign of a problem.

Lower Gas Mileage

The fuel pump could be an issue if your car requires more fuel than usual to fill up the tank. This shows that your pump valve is not correctly opening, resulting in excessive fuel injected into the engine. The engine does not store or consume the additional fuel.

Engine Stalls

Various faults within the vehicle can cause Stalling, but be cautious if stalling frequently happens while the vehicle thermometer indicates a high temperature. Fuel pump motor failure often results in increasing temperatures and stalling.

If the stalling frequently happens while the temperature is high, it is possible that the pump has indeed been destroyed and has to be changed.

AEM High-Pressure Fuel Pump

The AEM 380lph High Flow, High-Pressure Fuel Pump for high performance naturally aspirated and forced induction EFI vehicles. The High Flow, High-Pressure Fuel Pump can be installed externally or in-tank using optional hardware sold separately. It utilizes the industry standard "044 Style" envelope and -10 AN female inlet and -6 AN female outlet connections for easy installation on new applications and quick replacement of existing competitor fuel pumps. The AEM 380lph High Flow fuel pump delivers incredible performance and value.


  • Designed for high output naturally aspirated and forced induction EFI vehicles
  • Popular "044 Style physical configuration but with AN inlet and discharge port connections
  • Maintains very high flow even at boosted fuel pressures; 340 lph @ 73 PSI (30 psi boost)
  • Installs externally or in-tank
  • Each pump individually tested to flow minimum of 380lph (100gph) @ 43 PSI
  • For gasoline vehicles (pump life will be diminished when used with alcohol fuels)
  • Kit includes fuel pump, -6 to -8 male AN discharge fitting with check valve, terminal nuts, boots, instructions

Where is the fuel tank located?

An electric fuel pump located in the tank is connected to a component or hanger assembly secured to an entrance at the top of the tank. The top of the module/hanger unit has fuel lines and electrical wires for the pump and transmission mechanism.

The sending unit, pump, and float arm are usually included in a module and a tank to guarantee that fuel is accessible at the pump pickup and a filter to catch dirt and impurities.

The sending unit, reservoir, and float may or may not be included in a hanger assembly. You can use a roller vane, geroter, or turbine pump, the latter being the most prevalent on late-model automobiles.

Before igniting the fuel pump circuit, the PCM checks for a cranking signal from the camshaft sensor when the ignition key is pressed. The relay then provides power to the gasoline pump.

The pump motor spins, gathering fuel through the filter and delivering it to the engine via the fuel lines and filter. A port injection system's fuel pressure varies from 45 to 66 psi, while a throttle body injection device's pressure runs from 9 to 18 psi.

The sender's float increases and lowers in response to the fuel level. The float arm is attached to a rheostat, which regulates the amount of electricity sent to the fuel gauge based on the float location.

What to do if the engine doesn't start?

Check for the pump if the engine cranks but won't start. Test for voltage to the pump if it does not run. Inspect the circuit, such as the fuel pump relay, when there is no voltage and less than the fixed voltage.

Conduct fuel pressure and volume measurements if the pump is on. However, regardless of the cause of the failure, we have the necessary parts to repair it. So you can maintain and service your car your way, we provide thoroughly inspected, fully prepared replacement fuel components and hanger components.

We also deliver sender assemblies, individual pumps, and gasoline pump strainers. We also have seals, fitting gaskets, pushrods, and other installation essentials.

Find High-Quality Fuel Pumps and Components Only at Vivid Racing

From fitment help from our in-house experts to shipping packages, we'll take care of you and your Fuel Pumps every step of the way. We know how much of a financial investment you're making in a set of Fuel Pumps, accessories, and upgrades. In return, we'll deliver a service and product second to none.

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