High Pressure Fuel pump install

[Grit dog]

Also found this little gem on LMC’s website. I haven’t seen something like this for sale anywhere else.

https://www.lmctruck.com/fuel-system/fuel-pumps/fuel-pump-control-module-15

Still no motor in the truck yet, but I will be sure to follow up when I get this done and running!

They work great. I didn’t get it from LMC. I dont recall now but there’s several similar options out there.
My carb 454 is a gen vi so cant run a mechanical pump. This little gadget is the ticket to safe operation.

 

[Ricko1966]

Also found this little gem on LMC’s website. I haven’t seen something like this for sale anywhere else.

https://www.lmctruck.com/fuel-system/fuel-pumps/fuel-pump-control-module-15

Still no motor in the truck yet, but I will be sure to follow up when I get this done and running!

Not as simple and easy as just buying this thing from LMC but cheap and no truck down time if one would fail. 2 simple 4 prong relays from your local parts store,or even 1 simple relay and a diode. 1 relay runs the fuel pump,relay trigger is the original choke wire or an oil pressure switch. Second relay runs the fuel pump only in cranking position. Solenoid wire is the trigger. Even simpler is solenoid wire to a diode to fuel pump,again runs pump only in cranking position. The 2nd circuit is necessary to run the pump while the engine is cranking,the diode or 2nd relay is necessary to keep the fuel pump from backfeeding the solenoid and keeping the starter engaged after the engine starts. If a four prong relay fails you are only dead for a few minutes,you can cripple it back up a couple of different ways to get to the parts store to buy another 8.00 relay,not waiting for the mail to send you a new part. Also many oil pressure switches can be used to power your fuel pump,mid 70s Vega is one example. I think they were standard ignition number ps263. Didn't trust my memory,did a little quick research it's a ps64. Here's a wiring dighram for you

 

[Broken85]

It’s EXPENSIVE but it works
Holley #12-308
I bought 1 tried it out then bought 2nd later (had 3 of the in-line fuel pumps fail)
Install in your existing tanks
Works with existing fuel tank switch valve
Wired to valve so tank switch still works
No regulator needed
No return line
Works with factory fuel gauge
Been running them for 3 years now,
never had any problems

I think I maybe going to this set up sooner than I thought. I don’t think the inline can pull the fuel.

Question, when you wired the in tank pumps, how did you switch power between the two pumps? Did you use a relay and if so, what did you use to trigger it??

I will need to power them from the designated pump relay from the sniper two, so I am looking for the best way to provide that power to the selected tank. I thought about a two pole ground trigger relay to the sending unit of one tank, but I don’t think that is going to work. Potentially a tank switch valve off a 1987 would work since GM had to have solved this problem when they went to a TBI.