garyp
Jr. Member
Is this right, or does the return need to go to the tank? I read somewhere that the return could go to the accumulator then to the tank.
I personally don't understand why a lot of people are using a accumulator. Everybody i know who has this setup HAS HAD VAPORLOCK! i personally did a High pressure in tank pump and have NEVER had a issue no vapor lock or anything.
I can easily see how the above setup could cause vapor lock. Not handling the loop paths correctly.
But I know a lot of people who run an accumulator without issue.
Realistily you don't need an accumulator; IF (and it is a big if) you always keep the intank fuel pickup submerged. Any gulp of air will stall an EFI engine. I had a car that in a left turn on a very low tank of gas would stall. I could tell just how low the gas tank was by how hard I could take the turn before the stall happened. In a Bronco on a trail it isn't handling that will pull fuel away from the pickup, side hills, climbs, decents and even just bouncing around can all do it. If you never run low on fuel, never get into odd angels, never accelerate hard (or brake hard dependng on where the pickup point is in the tank); then you will probably be just fine without an accumulator.
The early EFI factory engines had an accumulator (small one) in the fuel lines. Later (and current) still have an accumulator but it is simply built into the tank.
A proper out of tank accumulator needs 2 inlets and 2 outlets. The inlets don't really matter. One is the supply from the main tank. The other is the return off the EFI regulator. Doesn't really matter how they enter. For the outlets there needs to be 2. And these do matter. One needs to be off the bottom of the accumulator, this feeds the high pressure pump. Coming off the bottom any air bubbles have had a chance to seperate and rise to the top. The top outlet is the return to the main tank. Any air bubble (either sucked up from the main tank or a vapor bubble from heating the fuel in the EFI loop) is sent back to the main tank.
seen many efi equipped Broncos including mine and have never once seen an accumulator in the return line. some have them on the supply side but many have removed them. they are good on the supply side if you run your fuel tank almost dry while driving but IMHO you don't need one anywhere. total waste. put a rope on yours and use it for a boat anchor.
I personally don't understand why a lot of people are using a accumulator. Everybody i know who has this setup HAS HAD VAPORLOCK! i personally did a High pressure in tank pump and have NEVER had a issue no vapor lock or anything.
I just bought the BC EFI fuel tank with the "in-tank pump", should I still install an accumulator? I think I am almost more confused now?