v-8 conversion fuel help

[rubydist]

The "returnless" fuel systems still have a return. There is a pressure line to the filter and a return line back from the filter to the tank. Rather than have the pressure regulator on the fuel rail in the engine compartment, the regulator is on the fuel return line in the tank. So the filter has 3 fittings - 2 on the tank end and 1 on the engine end of the filter. Under normal operation, the excess fuel is pumped to the filter and back to the tank, rather than all the way to the engine and back.

If you don't have any return (and therefore have no regulator) your fuel pressure will vary all over depending on how much fuel you are using, since the pump pressure varies with flow - but it should be way too high most of the time.

 

[franklin2]

I think I could probably hook something up but not sure how to get it back to the tank I don't mean the line I can run that I am talking about how it enters the tank ?? On the v-8 swap page he says that you can run one line but need an explorer regulator I wish I knew where to get one of them or is that in the pump?? I am surprised nobody else has dealt with this unless I am in the wrong section?? either way thank you for your help I am going to keep searching..

If you are using the 1996 tank, which used a return originally, it should have a return port capped off on the sending unit. Unless you changed something and now it does not have the return port anymore.

 

[willie07]

The "returnless" fuel systems still have a return. There is a pressure line to the filter and a return line back from the filter to the tank. Rather than have the pressure regulator on the fuel rail in the engine compartment, the regulator is on the fuel return line in the tank. So the filter has 3 fittings - 2 on the tank end and 1 on the engine end of the filter. Under normal operation, the excess fuel is pumped to the filter and back to the tank, rather than all the way to the engine and back.

If you don't have any return (and therefore have no regulator) your fuel pressure will vary all over depending on how much fuel you are using, since the pump pressure varies with flow - but it should be way too high most of the time.

If you are using the 1996 tank, which used a return originally, it should have a return port capped off on the sending unit. Unless you changed something and now it does not have the return port anymore.

I am going to pull the pump today I hope lol meantime going thru my pile of "stuff" lol I did find the two rail along with all the lines going back to the tank from the door /explorer It is a good amount of work but thinking maybe I should just go back to the two line system?? I am lucky enough to have a lift so i know I can get the lines in maybe just easier to do that?? going to check it out today hopefully I will update as soon as possible Thanks again

 

[willie07]

If you are using the 1996 tank, which used a return originally, it should have a return port capped off on the sending unit. Unless you changed something and now it does not have the return port anymore.

I am using the 99 ranger tank The explorer /donor is gone but I did save all the lines and fuel rail hope going to take off bed today and see if I can get the donor lines installed maybe that is the easiest way.. I do have access to a lift luckily so I think I can run the lines without to much trouble at least that is the plan?? Thanks again I will update as soon as figure out what I am going o do

 

[willie07]

If you are using the 1996 tank, which used a return originally, it should have a return port capped off on the sending unit. Unless you changed something and now it does not have the return port anymore.

I AM USING THE STOCK 99 FORD RANGER TANK sorry about the caps not to good on the computer On my fuel pump it has one for fuel going from the pump towards engine and into filter , the other line looks like something with evap system plugging into the cannister above the spare tire and a third port in the of the pump assembly center that is just a piece of hose on it just hanging over the side of the tank and ?? I wish I knew how to take a picture I was thinking that could be a return line?? I was going to put original 96 fuel rail and two line back into truck and use that port as a return line??

 

[willie07]

The "returnless" fuel systems still have a return. There is a pressure line to the filter and a return line back from the filter to the tank. Rather than have the pressure regulator on the fuel rail in the engine compartment, the regulator is on the fuel return line in the tank. So the filter has 3 fittings - 2 on the tank end and 1 on the engine end of the filter. Under normal operation, the excess fuel is pumped to the filter and back to the tank, rather than all the way to the engine and back.

If you don't have any return (and therefore have no regulator) your fuel pressure will vary all over depending on how much fuel you are using, since the pump pressure varies with flow - but it should be way too high most of the time.

So could I add that filter and run a line from the open end of the filter back to the tank ?? do I have to change the regulator built into the pump ?? and if so do you know what regulator I would need ?? Thanks .. I did find that filter it has a 5/16 in and out coming from fuel pump assembly to engine compartment and the one on the tank side I think is 3/8 for the return ??

 

[alwaysFlOoReD]

So could I add that filter and run a line from the open end of the filter back to the tank ?? do I have to change the regulator built into the pump ?? and if so do you know what regulator I would need ?? Thanks .. I did find that filter it has a 5/16 in and out coming from fuel pump assembly to engine compartment and the one on the tank side I think is 3/8 for the return ??

I don't know your specific setup, but normally a return is smaller than the engine feed. The engine uses some volume of fuel.

 

[rubydist]

The return line from the filter back to the tank is larger than the pressure line to the filter on these vehicles.

Yes, you need the filter from the returnless system, and you need the pump assembly from the returnless system. And you need the returnless fuel rail system or else you need to plug the return fitting on the fuel rail.

 

[willie07]

The return line from the filter back to the tank is larger than the pressure line to the filter on these vehicles.

Yes, you need the filter from the returnless system, and you need the pump assembly from the returnless system. And you need the returnless fuel rail system or else you need to plug the return fitting on the fuel rail.

Ok right now i have a 99+fuel rail on the engine with no return line can I use that with the filter that has the two outlets on the tank side use the fuel side to fuel rail and the other side of filter to return back to tank ? It runs right now but fuel pressure is high// I think I am confusing myself lol