Electric fuel pumps should be tested any time engine performance issues, such as sputtering or poor acceleration occur. Fuel Pump Test Step 1 How To With Fuel Pressure Gauge The ideal pressure is 35 psi to 65 psi most modern cars ball in this range. To start up connect the gauge to the fuel rail or on to Schrader vale located in engine. Now turn the ignition to on without starting the engine and take note of where in operates at. If the pressure is well below what the manufacturer has indicated, chances are your pump may be defective or simply not able to deliver a high enough operating pressure.
One of the simplest ways to check whether or not that pump is working properly might be just listening for when it operates. As you turn the ignition key, a working electric fuel pump should have made an efficient low hum or whine. The lack of sound would be indicative of a pump or relay failure, (or the wiring).. Up to 30% of fuel pump failures are attributed to electrics, a blown fuse or dud relay among the most common reasons; so by inspection and substitution with another known good item in its place from a similar functioning area you can first eliminate one major electrical cause.
There is a way to be sure if it is an electrical issue, take a multimeter and test the pump's voltage. But the first thing you must do is find your fuel pump's input and output terminals which can be found conveniently together in a sngle connector near where hte fuelpump module sits at he top of th efueltank. Using a multimeter, you can test to see if the pump is getting proper voltage from the vehicle's electrical system — normally between 12 and 14 volts. If the pump is not getting the power it neesd, then there may be an issue in your wiring, relay or car's computer system.
Also important is a visual inspection of the fuel pump's wiring and connectors. After time, the pump may become corroded or have worn power leads. Check the wiring carefully to see any damages and corrosion that may not allow your fuel pump from working. If the problem is either corroded connectors or bad wiring, try to fix those before replacing of pump itself.
If the fuel pump is working but you still experience performance problems, then it could be due to a problem with your car's fuel filter or pressure regulator. When a filter becomes clogged it can basically prevent fuel from passing, causing the pump to appear weak. It is suggested that the filter be replaced every 20,000-30,000 miles mileage (your driving condition may affect how frequently it needs replacement) to avoid these issues.
To do a more thorough assessment, some mechanics will use an oscilloscope to evaluate the waveform of the pump. This makes it possible to recognize abnormalities in the work of the pump that are not noticeable during pressure or voltage tests. This tends to be a technique used by professionals for when they are diagnosing the pump's performance in relation and correlation over time.
If they do, the electric fuel pump (assuming there is one) itself might be bad and should likely need to be replaced. Additional engine damage will result if a failing pump is not corrected quickly. To know more that what self or other pump replacement is durable, then You must get in touch with Electric Fuel Pump and takes pumps according to your car configuration.