ES White Paper WIF

A Water In Fuel or WIF sensor detects the presence of water in diesel fuel and gasoline typically using the difference of electric conductivity between two electrodes through water and fuel. Detection of water in fuel can prevent or at least reduce any damage water could cause to fuel injectors should water bypass the filter media. Water in the engine fuel system can cause injection system damage, hard starting, loss of power, misfiring, surging or stalling.