The fuel pump is the heart of your fuel injection system. When it stops working, the whole system will not run at all. This pump, usually found inside or near the fuel tank, is considered that important in fuel injection since it pushes fuel from the tank to the injectors and create sufficient pressure for accurate fuel delivery. The pressure from the pump and the volume of flow must both meet your vehicle manufacturer’s requirements or else, engine performance, emissions, and economy will get affected.
Flow and Pressure are so important in the fuel injection system. If your pump does not meet the OE minimum fuel flow or pressure requirements, then you will possibly experience drivability and emissions problems. The weak pump that you have will not be able to generate enough pressure, leading to troubles on the calibration of the fuel system. This can also let the engine run lean or starved for fuel under load. Symptoms will then show such as hard starting, poor idle quality, stumbling or hesitation when accelerating, and loss of high-speed power.
Low fuel pressure can also be a cause of lean misfire at idle under the load. This can lead to a dramatic increase in HC emissions. If this happens in your car, then you may not pass the emission tests. Hence, when your fuel pump becomes weak or has failed, it is important to have it replaced with a quality one (the one which meets all OE fuel performance specifications.)
Perhaps you wonder how fuel pumps get damaged? Just realize how active they are. Since fuel pumps run constantly over the years, they will experience wear in the brushes, armature bushings, and commutator. Pump vanes and gears can also wear down, causing gradual loss or pressure and flow.
The accumulation of rust and sediments can also cause pump problems. Fuel starvation can also be another factor in accelerated wearing, which can even damage the pump and other fuel injection system parts.
Never let your damaged fuel pump unsolved for a long time. Have the pump’s voltage supply and electrical connections checked at once. An open relay, loose wire, and blown fuse may have caused the pump to stop working. Or if not, low battery voltage may have reduced the pump’s ability to generate pressure.
Once the static pressure or volime of fuel is delivered less that the specifications of your car manufacturer, then have the fuel pump replaced immediately. Replacement will be required if the pump the pump’s check valve has failed.
If you are replacing your fuel pump today, make sure that you know what you are looking for. Selecting the right replacement involves more than looking up the year, make, model, and engine size. It also involves intelligent selection of OE performance specifications. Be sure that your replacement pump fits the same as your original pump. Nonetheless, your car might not require this. So check out the requirements carefully.
Since there are lots of performance requirements and pump designs used in our modern cars, lots of performance and fit problems are encountered. So again, be careful with choosing are replacement pump.
Regarding the installation, fuel pump is one of the most difficult ones to work on. Upon installation , whether mounted inside the tank or not, make sure that you will have the tank inspected and cleaned if contaminants are found in the pump or filter. Having the pump replaced without cleaning a dirty tank will doom the new pump to premature failure.
When replacing the in-tank fuel pump, disconnect the battery to avoid unwanted sparks. Upon doing so, drain the tank and remove the tank straps. As you do the installation, replace the filter screen and use a new O-ring or gasket for the sealing collar. Never test a new pump before it having been installed by jumping it. It you run the pump under a dry condition with no fuel (to lubricate it) will just end up to damage.
These are just some of the pointers that I can share. Just always keep in mind that the fuel injection carries the lifeblood of your vehicle. So better ensure the perfect condition of its components especially the heart.
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