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Fuel Pump Replacement/Installation

By Chris Myer

Answers questions such as:

How to replace 1997 dodge stratus fuel pump?
How to replace a fuel pump Volvo?
How to replace fuel pump?
How to replace fuel pump nissan?
How to replace fuel pump on gmc truck?
How to instructions for a saturn sl1 fuel pump?
How to change a electric fuel pump on gmc trucks?
How to install an electric fuel pump?
How do i install an electric fuel pump in my car?
How do you get to the fuel pump on a 2001 Ford Explorer?

Fuel-Pumps.Net recommends that you ensure that your fuel pump is replaced by a certified mechanic. That said, the basic process that they will follow to replace an in-tank fuel pump is outlined here. Replacement of an inline fuel pump is typically much less complex. The most important part of that process is safely relieving the pressure that is maintained inside the fuel line (even when the pump is off) and capturing the fuel that will be lost during the pressure-relief process.

To determine if the fuel pump for your car utilizes an inline or in-tank pump, look up your car and observe the part number. All inline fuel pump kits start with "GSL". Any other part number will be in-tank. Far and away the majority of cars use in-tank fuel pumps, not inline, and will follow the instructions posted at the link in the previous paragraph.

Fuel Pressure Regulation

By Chris Myer

Answers questions such as:

How is Fuel Pressure Regulated?
How it works car fuel pressure regulator?
How to properly test a fuel regulator?
How car fuel pressure regulator works?
How is Fuel Pressure Regulated?

Just as there are different fuel pumps for low pressure (carburetor) and high pressure (fuel injector) fuel systems, there are different ways to regulate the pressure of these pumps. most low-pressure systems use a front-pressure regulator.

This front-pressure regulated system uses a simple spring-pressure to increase or decrease the pressure of the fuel coming from the fuel pump. High pressure systems, on the other hand, are almost exclusively back-pressure regulated. That means the regulator is located after the fuel injectors and allows enough fuel to flow back to the tank to maintain the required pressure.

High pressure systems therefore require that the fuel pump is able to provide more pressure and flow than is actually needed by the fuel injectors so that effective regulation can be enabled. When the vehicle is making little horsepower (such as when it is at idle) the fuel pressure regulator is returning large quantities of fuel back to the fuel tank to keep the fuel pressure from spiking above what is required. When at maximum horsepower output, a smaller amount of fuel is being returned since more is being used by the engine to make power.

The answer to the FAQ entitled, "Fuel Pump Troubleshooting" answers how fuel pressure regulators for high-pressure (fuel injected) systems are tested.


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