The Mitsubishi Eclipse fuel pump utilizes two check valves to control fuel pressure and correct fuel flow through the gas lines. Different recalls on the Eclipse affect the operation fuel pump check valve. Once the fuel pump check valves begin to have problems, different symptoms develop in the performance of the Eclipse engine.
Fuel Pump Check Valve Symptoms
A symptom of a faulty fuel pump check valve in a Mitsubishi Eclipse is when the engine hesitates during acceleration. The Eclipse operator gently presses the accelerator pedal and the engine hesitates before catching and speeding up the vehicle. This hesitation is caused by the fuel pump check valve not opening and closing properly.