holyshift

Has anybody every modified the stock fuel pump pickup to work with an external pump for a carb.??? Ive heard of it happening but never actually seen hows it done or how well it works...any ideas let me know...Thanks

mjr46

yes....i have such on my 85 that was cfi... i removed intake pump and in place of it I ran a piece of 3/8 tubing joined with a hose and clamps and set to proper depth and run an external fram canister hp filter and holley blue pump

holyshift

Thats exactley what i was thinking to do, just wasnt sure if it worked to well. Thanks for the info mjr

mjr46

it'll work just fine...and for me 5 + years and still working

holyshift

Awesome, I just did my intake swap from EFI, and gota drop the tank now and modify that and connect some fuel lines and ignition box and i should be runnin here in a couple days, oh and by the way i got the new Summit Racing ignition box and Dizzy....very nice pieces if anyone needs to get some new ignition stuff check this out before you pay big money for MSD or something.

FLcracker9

I didn't remove anything in my 86 F150, I just cut the hot wire to the factory pump at the tank, and installed the electric pump in-line on the frame. My Holley Blue pulls fuel through the factory pump and pick-upwith no problem. Going on 2 years now, still working. On the 89 mustang I'm building, I'm going to use the factory pump for my carb set up. I bought a Mallory bypass fuel regulator ($80) thatallowsthe use of thestock high pressure pump. The excess pressure gets dumped back into the tank via the bypass line. This also keeps thefactory inertia switch intact in case of an accident, the pump will still shut off. I believe Joel 5.0 runs his like this with no problems?.

mjr46

I used factory wiring and just grounded the relay leg controlled by the ecm for PIP signal.....so my way still retains all factory features.. removing pump from carrier doesn't alter this in one way as long as you wire the blue pump into existing wiring

holyshift

Were the 86's EFI? If so would that be the same as my car.. I have an 88' that was EFI and iam going carb., could i do the same as you did and just put this holley blue inline and it be ok???

FLcracker9

The fuel pump on my 86 F150 is the submersible type, and it's mounted in the tank. I was experimenting, and not wanting to dropthe tank, I installed the blue pump on the frame, even with the bottom of the tank, and spliced into the fuel line. I ran a temporary hot wire from the battery to the pump, grounded the pump, and presto, fuel was siphoning out of the stock pump with no modifications. I said to myself, hey this is great if I don't have to drop the tank!. I did keep the blue pump as close to the tank as possible, and I installed a large plastic fuel filter between the pump and the tank (close to the pump). It serves 2 purposes, 1 to filter the fuel, 2 it acts as a resevior hold fuel when the engine is shut off, so on start up, it siphons with no problem. Remember, electric pumps are designed to "push" fuel, not pull fuel, thats why you should mount it as close to the tank as possible. If you really don't want to pull the tank, try it, you have nothing to lose?, if it doesnt siphon, you'll have to pull the tank and modify the old pump!

holyshift

Right on!!! thats awesome, I thinki may have to try that cause Iam in the same seat you are, I dont feel like dropping the tank, ill let you know the outcome, thanks fellas.