Determining the Health of your Fuel Pump
We can check the health of the fuel pump and filter by using a technique with our scope called "Current Ramping" What is is essentially is looking at a currrent draw waveform when the fuel pump is activated. Looking at the first waveform you can see the irregular pattern. This is an indicator that the pump is worn ( bushings, brushes, commutator etc.) We can also determine the pump rpm and average current draw which can also indicate a partially restricted filter element or a pump that is on its way out.