My old RV-4 has a three way gage, fuel pressure, oil pressure, oil temperature, out of a P-38, all mechanical. The fuel pressure went out so I am in the process of replacing it with a UGA electric 3-way gage. The question is where to place the sender. Current system is two wing tanks to fuel selector valve to fuel filter to gasolator to mechanical fuel pump to fuel flow tranducer to fuel injection. There is a union between the mechanical fuel pump and gasolator and also a junction between the fuel pump and fuel flow tranducer.
I still haven't found where the mechanical fuel pressure line takes off.
I still haven't found where the mechanical fuel pressure line takes off.