As he says. The 'impact' switch is not necessary, they only started using them when the fuel pressure bumped way up for FI, a small leak that causes a fire in wreck becomes a misting fogger with higher pressure FI to produce explosions rather than fires. The impact switch can be mounted anywhere, but absolutely needs to be mounted in correct orientation to work best. Just like the car you get it from, and only available from junkyards pretty much. I never sold a one at the parts store ever and thinking can't get them. Dealer part only.
Anywhere around 5-7 psi pump will do, and yes it can deadhead with needle closed and no harm but depending on the one you get may not be quite as reliable as the mechanical one is longterm. The mechanical pump will pump trash through that can bring the electric one down depending on the type, diaphragm or impeller. The impeller type can scar up with dirt or sand going through it.
Ford FI needs no main pump power bypass because PCM is set up to run pump for 2 seconds at key on to prime the FI even if you don't crank. Modern ones don't bypass fuel back to tank anymore, rather they use a 'driver module' that speeds up or slows down pump based on demand, it makes pump last longer but PCM has to control that feature.
' Im NOT SURE YET what the issue is it could be the sock filter or the hoses or a hose. Or it could be the pump. I just thought for a minute an electric fuel pump might b eeasier to install I could even leave the old one on the engine I guess.
I always preferred the original parts, and I remember my thoughts the first time I heard of someone having a fuel pump inside the gas tank.
But its getting cold Im getting old and just want an easier way........... .'
Caps by me.
Your stuff and do what you will but this is not easier. Throwing parts at it anyway as long as you do not positively verify that tank and sock and lines are clean and open. Nothing wrong with electric pump idea except if lines or sock clogged, you haven't cured anything in that case. No way would I be doing any of this without the lines and other known clean and working FIRST, and then most likely no problem by then anyway. Pumping through the old pump is not intuitive either, what if it is part of the problem too? In short, casting around for cures that may or may not work but not dealing directly with the problem there to get to 100% working perfect and DONE. Murphy's Law generally doubles up on you when yo do that.
No insult or injury meant to anyone at all but having done this stuff for many years I've learned to fix what's broke, not what I think is broke, two totally different things there. I watched that happen so much at the parts store it was incredible, and thousands wasted on ideas that 50% of the time only burned cash and patience. Many people get close to problem fixes but then meandering ideas make them drop sight of the ball to fumble around for a good while.
Luck.......... ..........