When you experience symptoms like engine sputtering, difficulty starting the car/vehicle or poor acceleration and your vehicle is equipped with an electric fuel pump then chances are good that we will have to check both among other possible tests at least in one case: checking for proper electric final pressure! A fuel pressure gauge is essential for this process because it can be used to measure the level of pressure in a fuel system. Most of the recent vehicles require that fuel pressure be maintained at around 35 to 65 PSI, depending on engine specs.
When starting, find the Schrader valve on the fuel rail. Such valve is commonly located near the fuel injectors, and it appears as a tire-sahapedvalve stem. Make certain the fuel pressure gauge is securely connected to this valve so no false reading are taken. You need to perform a fuel system pressure release first, by either removing the relay or fuse for your vehicle's fuel pump and then allowing engine start until it stalls. This stops any extra fuel from spraying all over when you plug in the gauge.
With the gauge in place, turn on and off ignition without starting engine. Now, the electric fuel pump should kick on and pressurize the fuel system. Compatibility with the manufacturer's specifications can be confirmed by checking the reading on a pressure gauge. For example, if your vehicle needs 50 PSI and the gauge is showing far less that might mean you have a weak fuel pump, clogged filter or bad regulator.
When a gauge reading is significantly lower than the required pressure, it means that the fuel pump in your car cannot send enough power to meet engine demand and results symptoms including poor acceleration or stalling of an engine. Loss Of Fuel Pressure (Due to a Bad Pump Or Something Else) —30% Testing for voltage to the pump can help rule out electrical issues.
And keep in mind that fuel filters should be replaced every 20,000-30,000 miles to prevent clogs, which can cause the pump to overheat and lower pressure. If swapping in a new filter doesn't help both pressure went way up, far out of spec) first step would be to check the fuel pressure regulator; FPR is penetrated by an air passage too).
This allows to test fuel pressure and therefore saves us from replacing the pump automatically, which can help if it is seized within a regulator or in lines of feeding. To learn more about electric fuel pump replacement or diagnosis, please go to Electric Fuel Pump and discover superior service for your auto application.