Also what does the module do and what is the plug in on top of the module do, I assume it's for settings or diagnostic.
Don't know of any modules with most EFI setups. If it's red module it might be an MSD Atomic system. Any names or designations on stuff?
Being a '74 it might also have had a Ford electronic ignition originally and someone just left the old ignition module on the wheel well. But by your description of a "plug on top" I don't recognize it.
A member explained that the EFI is higher pressure and you cannot use the 3 way anymore
I've heard that too, but not sure how it is with maybe a new valve? Maybe they're just not made for 40-100 psi, which would not be surprising.
But they also don't have a method to direct the return flow. Which is why no matter if it's manual or electric, you need 6 ports if you're going to run EFI in the normal modes with dual tanks.
One member suggested I convert my aux tank to transfer tank. I assume I get a rail mounted 12 volt fuel pump with a dash switch and pump fuel to the main tank when needed.
How does that effect my 6 way valve now.
You assume correct. When the main tank starts running low you turn on the transfer pump and simply transfer all the fuel in the auxiliary tank into the main tank where your pump can utilize the feed and return lines.
As Steve said, it effects your valve by making it completely unnecessary.
Almost no such thing as too many questions. We just need more details.
Performance Fuel systems I'm using one fuel pump at present on rail and the 6 way valve the module is mounted on my fenderwell.
Performance Fuel seems to make only accessories for fuel injection systems. Not the systems themselves. So yeah, we're still going to need more details or some good pics.
I have pics but don't know how to post them
No problem. To upload directly you need to become a contributor for 12 bucks a year. Or you can use an online image hosting site like SuperMotors where Steve83 resides.;D
You can e-mail some to me at
paulb@wildhorses4x4.com or upload some to your "garage" function in your User CP area above.
Not quite. It's actually 3-feeding the engine and 3 returning to the tanks.
If they're all the same size then you need to look up some sort of road map to which is which. If they are different sizes then on the side with 4, the two larger ones are "feeding from" each tank, while the two smaller ones are "returns to" the tanks.
The side with 2 ports the large one is the feed to the engine and the small one the return from the engine.
This way when you switch the valve it returns fuel to the same tank it's pulling from. If it did not, then you might be pulling fuel from one tank and returning it to an already full tank. Overloading and spilling fuel out of every available orifice.
not same as module. I'm thinking about putting a check valve in each supply line so there is no way for fuel to get pushed back to either tank if switch is wrong .
Check valves are not a bad thing. But they're usually not necessary either. Your pump should, I believe, have a built-in check valve value itself. But some have added additional ones.
The real trick is to just not hook up the plumbing wrong.
I'm thinking the supplemental pump is the way to go but not sure how to plumb it. I know there is a feed line and a vent line on each tank.
The vent lines will be different, because they're only supposed to pull vapors from the tank and store them in the charcoal canister on the passenger front frame rail. First they go to the plastic condensing tank behind the driver's left shoulder, then any liquid that condenses is allowed to feed back to the main tank via a small return line.
With EFI you need full independent feed and return lines. Different ways of doing it of course, but most try to return to the tank that's being used, while some will return to a common point, or reservoir in the feed line so that the fuel goes right back into the system and re-fed to the engine.
I like routing them to the tanks, but have not used many different setups myself yet.
Paul