Electric fuel pump wiring?

[greenteagod]

So from my understanding, this is a safety issue. If for some reason the engine stops then it kills the fuel pump as well. In the event of a wreck you might not have your senses about you to stop pumping gas on an engine fire or something else bad going on. It seems there would be more situations where you'd lose oil pressure and want the fuel to stop rather than losing fuel pressure and wanting the fuel to stop.

Not that I've done this mod just yet, I am waiting on a couple parts, but I actually did have a friend who had an old 240z and that thing burnt to a cinder because he had a rear mount battery and electric fuel pump. Engine caught on fire and it basically just emptied the entire gas tank in to the fire because that was still operational.

I'm not trying to speak on behalf of pennyman or anyone else so I'll definitely let them chime in about that.

That is true about the lines emptying, but pennyman says he's been running this setup for a good long while. I wager he can attest to that aspect of it.

[camoit]

You could always add in the two systems so it can shut off aether way.

[BradMph]

There is also the impact sensor that can be used to shut off fuel. Though you need a reliable one and probably more then one. Front/Back or a central located sensor. The ole 2 wire airbag sensor could be modified to control fuel since it detects an impact. I am really thinking more and more on this type of shutoff because some people have had issues with oil switches if they get a switch that shuts off fuel at a higher oil pressure rating then the required switch settings. They roll up to a light with a quart low of oil and engine shuts off. Our trucks, well atleast mine is getting older and oil pressure is not on viagra anymore, so it does drop lower then normal. I am though going to try the oil switch first, but if it causes a problem I am definitely going towards an impact/roll over sensor.

[pennyman1]

The oil pressure switch only needs 5 psi to switch, so if you are dropping below that at a stop, you got problems. Also make sure the oil pressire switch has a large hole in it so it doesn't clog from an errant piece of sludge. Use a switch like this: http://www.ebay.com/itm/310333238965...t_12655wt_1327