Fuel pump help, Please Options

[gster]

I've installed an Airtex pump on the car as recommended by many.
The car does run but terribly....
I hope I've installed correctly and put the "T" adapter in the right place.


The fuel line from the tank goes to the filter then to the pump.
The pump output line is then T-eed to the other 2 lines....



Have I got this wrong?
Is the filter restricting flow?
The car has been sitting awhile and I've put fresh gas in.
Otherwise nothing has changed.
Any help is appreciated.

[Dave_Darling]

Let's summarize things a little bit here.

- The original pump had three ports. One was intended to dump extra fuel from the pump back into the fuel tank. They later figured out this wasn't really needed, which is why pretty much all fuel pumps are now two-port pumps.

- The 914's fuel system works by the pump pressurizing the fuel, and the pressure regulator acting as a flow restriction or blockage, like putting your thumb over the end of a garden hose. Any excess fuel that gets through or past the restriction is dumped back to the tank. That's what the return line is for.

- If you split the outlet of the pump and run one leg of that back to the tank, the majority of your fuel will take the easy way and wind up being dumped back into the tank. You will have very very low fuel pressure.

- If you take the outlet of the fuel pressure regulator and hook it back into the outlet of the pump, excess fuel will go straight back into the high-pressure loop of the fuel system and the pressure will build until the pump cannot push any more. You will have very very high pressure.

In this situation, you should get rid of all of the "T" and "Y" fittings in the fuel line except for those at the fuel rails. (The fuel rails, more or less, are complicated T fittings.) Run your lines from the tank, to the filter, to the pump, to the fuel rails, to the pressure regulator, and back to the tank.

--DD