News » 535lph Fuel Pump

The Walbro/TI Automotive F90000295 535lph fuel pumps are high-flow units designed for high-performance applications, but they do not have internal check valves. This presents a problem when running multiple pumps in a staged application. The Issue: No Internal Check Valves = Fuel Pressure Drop Check valves prevent fuel from flowing backward when a pump is not running. Since the F90000295 lacks check valves, fuel can backflow through an inactive pump, creating the following problems: Loss of Fuel PressureWhen one or more pumps are off, fuel can flow backward through them, reducing system pressure. This means your fuel rail pressure won’t stay...