Fuel system flush circuitry and method for operating the same

A fluid injection system, comprising:

• a fluid injector assembly;
• a fluid conditioning module having an outlet port that is fluidly coupled to an inlet port of the fluid injector assembly via an injector assembly inlet conduit, wherein the fluid conditioning module includes:
• a motor system operatively coupled to the controller;
• a recirculation pump operatively coupled to the motor system, an outlet of the recirculation pump being fluidly coupled to an inlet of the recirculation pump via a first filter;
• and
• a delivery pump operatively coupled to the motor system, an inlet of the delivery pump being fluidly coupled to an outlet of the first filter, an outlet of the delivery pump being fluidly coupled to the injector assembly inlet conduit;
• a flush conduit fluidly coupled to the outlet port of the fluid conditioning module;
• a flush valve disposed in the flush conduit and configured to control a flowrate of fluid therethrough;
• and
• a controller operatively coupled to the fluid conditioning module and the flush valve, the controller being configured to adjust a flowrate of a fluid through the injector assembly inlet conduit by controlling the flowrate of fluid through the flush conduit, the controller being further configured to determine a filter blockage of the first filter based on a measurement of power of the motor system.