Starting suggestions after fuel filter change

javelinadave

Administrator
Staff member
Adam,
So if you have the key in the on position and the engine isn't running the electric pump is still running. It needs a switch so it only runs when there is oil pressure for it to be installed "correctly". Five to ten minutes of listening to the radio or ??? and the pump may overheat, melt itself or a line and now you have created an air/fuel leak.
With the good comes some bad. I'm not criticizing or debating, YMMV.
 

AdamSanta85

Well-known member
Adam,
So if you have the key in the on position and the engine isn't running the electric pump is still running. It needs a switch so it only runs when there is oil pressure for it to be installed "correctly". Five to ten minutes of listening to the radio or ??? and the pump may overheat, melt itself or a line and now you have created an air/fuel leak.
With the good comes some bad. I'm not criticizing or debating, YMMV.

The pump turns on when the key turns, just like every car that comes with an electric fuel pump. I solved the radio issue by installing a small switch that allows me to turn the radio on without the key in the ignition. Wasn't needed but simple enough to do. Handy at the beach.

As far as running the pump without the engine running/fuel pressure and it causing over pressure or over heating...

The point of having a electric pump in the system is to have pressure in the lines. The pump I am using (link) makes a max of 14psi (low, modern fuel injection systems are way higher). With the pump running/solenoid open fuel goes into the FIP, into the injector lines, back out through the injector return, pressure gets built up by the small orifice in the return line banjo (this also creates pressure when using just a lift pump), fuel passes through there and returns back to the tank where it is recycled. If for some reason the stop solenoid failed and the pump was running the pump would just build max 14psi in the system and hold it. I suppose if I had a weak fuel system that could cause a leak. Engine on or off the pump is doing the same thing.
 

javelinadave

Administrator
Staff member
I'm not criticizing or debating.

^^^^^^^^^^^^^^^^^^^^

I am happy that you are so passionate about the electric fuel pump, I just don't agree with the need. Again, I'm a purist so I also wouldn't hook the radio up like that either but that is just me.
 

AdamSanta85

Well-known member
^^^^^^^^^^^^^^^^^^^^

I am happy that you are so passionate about the electric fuel pump, I just don't agree with the need. Again, I'm a purist so I also wouldn't hook the radio up like that either but that is just me.

I was just replying to your questions, and clearing up that using an electric pump won't cause wires to burn up, fuel pumps to overheat or lines to leak. No worries.

I also wouldn't hook the radio up like that either but that is just me.
The radio still turns on/off with ignition. If I flip a switch you can use radio without the key. It's the best of both.
 
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