Fuel Pump and Filter Replacement

Simply put, a vehicle's fuel pump forces the fuel from the fuel tank into the engine. A vehicle does not operate well if the pump is failing. The vehicle may progress for a short while but eventually the pump will fail and this may leave your vehicle dead on the side of a road. 


All internal combustion engines need three things to operate; air, fuel and spark. On this page we will talk a bit about the fuel aspect beginning with the components of this system: 
Fuel tank - a metal tank that holds the fuel which may also contain the fuel pump and emission control components. There is a filler tube that opens to the outside of the vehicle and a sending unit that relays the amount of fuel in the tank to the gauge in the driver's control panel.
Fuel pump - is located inside the fuel tank on newer cars, attached to the engine or on the frame rail between the tank and the engine 
Fuel filter - located either before or after the fuel pump and sometimes in both locations, made most often from paper products but it can be made of stainless steel or synthetic materials - most are designed to be disposable.
Fuel injectors - are tiny electric valves that are operated by the engine control unit (ECU) which open to spray fuel into the intake manifold of the engine - in use in domestic vehicles since 1986.


Most common issues with the fuel injecting system:
A problem occurs most often from a clogged fuel filter. Usually the engine sputtering will sputter at high speeds or it will not start at all. The second most common failure is the fuel pump. Most often if the pump relay is working correctly the the pump is not working. The last possibility is dirty injectors which clog over time causing the injector to not deliver fuel to the engine or sticking open and delivering too much fuel.


Suggestions to determine if your fuel pump is failing
The engine jerks and then resumes normal performance doing this repeatedly
Your vehicle begins using too much fuel, you are filling up more often
The temperature of the vehicle is hotter and the engine is stalling
The fuel pressure gauge does not register the proper pressure according to the manual
The engine does not start


The owner's manual will note how often to replace your particular vehicle's fuel filter. If your vehicle demonstrates any out of the ordinary conditions, our expertly trained technicians at Main Street Automotive will gladly access the problem, make recommendations and give you a free estimate. 

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