Fuel Pump pressure loss testing (for fuel delivery-related symptoms due to poor performance) Low pressure is usually caused by malfunctioning components, leaks or clogs and pinpointing the specific issue keeps the fuel system functioning in the proper 40 – 60 psi range for most cars.
The most common tool used for testing pressure loss is the fuel pressure gauge. Start by finding the Schrader valve on the fuel rail that gives you access to the fuel system. Make sure that the gauge is well attached to this valve, there should be no leaks in the test process. Put the car in an “on” ignition position however never ever starting the engine. This will prime the pump and you should see a baseline reading from the pressure gauge. If that reading is far from spec, it means either a pump failure or a blocked fuel filter.
Record the baseline pressure and test for pressure retention. Switch off the ignition, and watch for the gauge to drop right down. A healthy system will hold pressure for a few minutes, but any loss happens almost immediately and shows that there is a leak in either the fuel lines or injectors, or a defective check valve on the pump. This test is critical because research states that 25–30% of all fuel system failures are caused by pressure retention problems.
The machine can also perform a “deadhead” test to isolate the pump to check its maximum throughput. Unhook the line that leads from your fuel system into your engine and attach the gauge directly to the outlet of your pump. Ignition on, pump should have 90-100 psi. Anything below this range indicates internal pump wear or motor issues.
This is why pressure loss testing is important: real world examples. The fuel pump, which failed more than 150,000 vehicles in a recall last year for sending inconsistent pressure, is the latest case. Drivers described loss of power and stalling, and further investigation found that some pumps couldn’t maintain sufficient pressure due to worn components.
For example, to prevent a loss of pressure from clogging or contamination, they suggest replacing the fuel filter every 15,000 to 30,000 miles. When diagnosed as faulty, replacing the pump with a quality replacement such as Kemso Fuel Pumps will provide unrivalled consistency in pressure and durability.
To know more and effective replacement solutions, go to Fuel Pump. Finding pressure loss early eliminates any more damage and ensures the fuel system operates efficiently.