v-8 conversion fuel help

[willie07]

Good morning, I searched the forums but could not find what I need ?? My name is Bill and is first time posting .. I bought a project 99 ranger 4x4 auto. ext cab 126 in wheel base that originally was a 3.0 then the p.o . converted to a 351 auto . When I bought it the 351 was blown up ,disassembled and basically non useable. I found a donor 1996 explorer 5.0 awd with a good drivetrain but a rust machine lol perfect for my needs. I installed entire drivetrain from the 96 explorer donor vehicle after doing a water pump ,timing chain rear main seal all gaskets and used the cast iron manifolds from a 98 explorer and completed install .. I did switch over to a one line fuel rail l system that came with the truck but this is now my issue the truck runs and drives (yard drive } did a fuel pressure test from schradder valve on fuel rail and I have a reading over 100 lbs I know it is to much ..the only thing i found regarding this is I need a fuel pressure regulator from an explorer pump?? Does that mean I need to install an explorer pump or add a regulator somewhere down the fuel line?? I had to get rid of the donor vehicle not sure how to correct this problem It does run fairly decent even though I know the fuel is an issue cant take it in the street right now but it defiantly smells rich when running and idle is searching ?? I have gotten a lot of info from this site so I am hoping some one has the correct answer I would really like to get my project completed and road worthy thanks in advance , Bill

 

[franklin2]

You must not have used all the wiring and modules from the explorer? I think the single line fuel systems have a brain box mounted toward the rear, and it varies the voltage to the pump to help control the pressure, along with a return system near the pump also.

I am not too familiar with the single line system. But I think if you use the single line, you will need to go whole hog and use the wiring, the pump, everything to make the single line system work. Or convert back to the dual line system if the truck originally had that.

 

[franklin2]

Here is a article from a guy who has done your swap.

Swapping An Explorer 5.0L Into A 1998-2011 Ranger - The Ranger Station

Want an Explorer 5.0 in your Ranger? Using the Explorer 5.0L wiring, computer and accessories will basically be a plug and play conversion.

www.therangerstation.com

Here is excerpt from the fuel section.


Fuel System:

The 1999+ Explorer fuel system is a returnless (no fuel return line to tank) and runs at 65 PSI just like a 1998+ Ranger. Earlier Explorer engines (1996-1998) run at a lower pressure and use a fuel return line. For the return line, you have two choices. Run a return line or use 1999+ Explorer rails which are returnless. Use the in-tank fuel pressure regulator from an Explorer pump assembly with 1996-1998 Explorer 5.0L engines. That is very important, as the 4.0L Ranger in-tank pump is set to ~60psi and the Explorer 5.0L pump is set to ~42ps

 

[willie07]

You must not have used all the wiring and modules from the explorer? I think the single line fuel systems have a brain box mounted toward the rear, and it varies the voltage to the pump to help control the pressure, along with a return system near the pump also.

I am not too familiar with the single line system. But I think if you use the single line, you will need to go whole hog and use the wiring, the pump, everything to make the single line system work. Or convert back to the dual line system if the truck originally had that.

Hi, Thank you for your help I should have included thar in my original post .. I used the harness and pcm from the 96 explorer and plugged it into the 99 harness at the firewall made the necessary charging modification and grounds at the fire wall and the starter connection It starts and runs gauges work all good except for the fuel issue even have the a/c hooked up I did read the article about the explorer regulator in the tank i was hoping somebody could tell me if I use an explorer ump and what year pump di I need if that is the case ?? I do appreciate the advice and help

 

[willie07]

Here is a article from a guy who has done your swap.

Swapping An Explorer 5.0L Into A 1998-2011 Ranger - The Ranger Station

Want an Explorer 5.0 in your Ranger? Using the Explorer 5.0L wiring, computer and accessories will basically be a plug and play conversion.

www.therangerstation.com

Here is excerpt from the fuel section.


Fuel System:

The 1999+ Explorer fuel system is a returnless (no fuel return line to tank) and runs at 65 PSI just like a 1998+ Ranger. Earlier Explorer engines (1996-1998) run at a lower pressure and use a fuel return line. For the return line, you have two choices. Run a return line or use 1999+ Explorer rails which are returnless. Use the in-tank fuel pressure regulator from an Explorer pump assembly with 1996-1998 Explorer 5.0L engines. That is very important, as the 4.0L Ranger in-tank pump is set to ~60psi and the Explorer 5.0L pump is set to ~42ps

Hi thank you , yes I did read this but not sure if this means to run a fuel pump from a 96-98 explorer or the regulator from the pump ?? I would like to run the one line fuel from the tank to the rails without the return line .. If it is a just purchasing a pump for a 96 -98 explorer that would be great I wish I could have kept the explorer but I am doing this in my backyard and trying to remain friends with the neighbors lol so far so good I am semi retired and just a hobbist always wanted to do a ranger conversion they are cool trucks, . any advice /help /thoughts are always appreciated , Bill

 

[85_Ranger4x4]

I don't know about the OE fuel systems, I snagged a aftermarket return style regulator for my EFI swap to dial in the fuel pressure. It does not go in the tank.

IIRC without looking at the book I think my EFI system (aftermarket Aces throttle body injection) wants around 50psi so I need something to knock it down to there.

 

[franklin2]

Hi thank you , yes I did read this but not sure if this means to run a fuel pump from a 96-98 explorer or the regulator from the pump ?? I would like to run the one line fuel from the tank to the rails without the return line .. If it is a just purchasing a pump for a 96 -98 explorer that would be great I wish I could have kept the explorer but I am doing this in my backyard and trying to remain friends with the neighbors lol so far so good I am semi retired and just a hobbist always wanted to do a ranger conversion they are cool trucks, . any advice /help /thoughts are always appreciated , Bill

The diagram below has the 1999 3.0 fuel pump system in it. You can see there are some wires to a pressure sensor. You most likely have no where for these to go with your older PCM. Unless someone else has an idea, I think you are going to have to change the fuel rails and install a return line. And see if a 1996 ranger fuel pump/sending unit will fit the 99 tank.

 

[franklin2]

I found where "G" goes in the diagram below. It looks like a signal ground.

 

[franklin2]

Here's where the "X" and the "I" go. X looks like signal power, and I looks like the pressure signal input to the computer. This is all 1999 stuff.

 

[superj]

you could probably easily get a holley multiport fuel pressure regulator, i think a blue top is the higher pressure version, and just run the left arm to the fuel rail and the right line make a return line to the tank.

there are a few on this page that would work and less then 100 bucks. even the chevy style one would work

https://www.holley.com/products/fuel_systems/fuel_pumps_regulators_and_filters/regulators/

 

[superj]

i used one on my wrangler when i changed it from the stock carb to a holley four barrel. i know i am talking about carbs but the same principle applies.