I see that most people use the schrader valve port on the fuel rail to be used as the return line for the FMU. What I was woundering, how do you get around the fact that it is a schrader valve? Do they make fittings that will depress the valve or open it for this purpose?

Or, do you just try and gut it?

There's a little tool to remove it, costs maybe 3 bucks at any local parts store.

Oh, and if your installing an fmu on the 96+ returnless fuel system, then you don't need to worry about this b/c the fmu goes back between the stock fpr and the tank.

I KNOW I'M BUMPING AN OLD THREAD....

but does this mean a return line is not needed if i place the vortech 12:1 fmu between the stock and walbro hp fuel pump.

anyone confirm this?

just looking for as much confirmation as possible before i try it.

no need to bring it back a simple search would have found your answer 1000 times at least .

fmu goes on the return port on the fpr to the feed on fmu .then return on fmu goes to tank .