Holley 2300 EFI?

[ISX_15]

Been looking around for options to upgrade later on, and seems like Holley EFI is the move, my only question is, how can i do this while keeping my OEM fuel tank? Can i keep the OEM fuel guage working? Curious how others did their fuel systems, im thinking about getting a brand new fuel tank and running a inline pump, and if possible just capping off the factory lift pump opening. The fuel pump modules im seeing dont require the need for a return line , aswell as pressure regulator being built into the unit.

 

[ISX_15]

If anyone is familiar with the fuel tanks let me know if this would work as a replacement to my factory one, not a big deal if stock guage doesnt work, can utilize the handheld

https://www.holley.com/products/fuel_systems/fuel_injection/sniper_efi/ignition_and_fuel_systems/fuel_systems_and_accessories/in-tank_retrofit_fuel_module/parts/12-168

 

[Curious Hound]

OEM fuel level sender should be fine. Not sure why you think you would need a new tank. One thing that might be helpful would be to download the manual and installation book from Holley and read it thoroughly several times. That should answer a lot of questions before you go buying a bunch of stuff you don't need. I know that for the stand-alone digital dash I ordered, I was able to download all the documents and study them before The unit arrived.

 

[ISX_15]

I need new tank cause mine is original and rusty, got bad fuel going on. If i end up replacing tank ill redo whole fuel system. How would oem fuel level sender still work if i change it out to those drop in tank modules? Understandable if i kept the stock sending unit but isnt that part of the pump? I can do inline pump and keep the sending unit like you suggest but it seems sloppy. Rather just get a sending unit module and ditch the old one.
Besides my factory fuel guage never was accurate, i dont mind on relying on the computer screen.

Edit: if i keep stock sending unit/lift pump, do i just add new fittings to the tank for the EFI inline pump and fuel return? Leave factory lift pump/fuel pump unplugged, whilst keeping sending unit wired?

 

[85_Ranger4x4]

I need new tank cause mine is original and rusty, got bad fuel going on. If i end up replacing tank ill redo whole fuel system. How would oem fuel level sender still work if i change it out to those drop in tank modules? Understandable if i kept the stock sending unit but isnt that part of the pump? I can do inline pump and keep the sending unit like you suggest but it seems sloppy. Rather just get a sending unit module and ditch the old one.
Besides my factory fuel guage never was accurate, i dont mind on relying on the computer screen.

Edit: if i keep stock sending unit/lift pump, do i just add new fittings to the tank for the EFI inline pump and fuel return? Leave factory lift pump/fuel pump unplugged, whilst keeping sending unit wired?

Get a sender for a EFI 85-88 RBV with your wheelbase/cab configuration.

Swap out the pump for a high pressure pump, I just did this for my EFI conversion (which is still in process) You will need to run new high pressure rated fuel line(s). Check your EFI for what it wants for pressure and configuration, mine preferred a return line which also helps cool the TB and fuel.

A 2.8 doesn't have a pump in the tank, it is on the side of the engine. Just delete it and cover the hole with a blockoff plate.

83-84 fuel tanks have a smaller hole for the pickup as EFI did not exist then, to use the OE style in tank pump you need a 85-88 tank with the larger hole.

Here is what I did:

Post in thread 'Aces Killshot Fusion EFI Swap'

Mar 8, 2026

Pulled in the garage ready for the fun to begin...



Right in the feels...



Kind of a side project is making my inop check engine light trigger with the second efan wire from the new ECM. You can set the temps where you want them so I can have the efans kick on around 200* like they do now and have the CEL come on around 220* or so for an added alert



My...

• 85_Ranger4x4

• 

Post in thread 'Aces Killshot Fusion EFI Swap'

Apr 1, 2026

Trying something new... a more tech oriented Youtube channel

• 85_Ranger4x4

• 

 

[ISX_15]

Get a sender for a EFI 85-88 RBV with your wheelbase/cab configuration.

Swap out the pump for a high pressure pump, I just did this for my EFI conversion (which is still in process) You will need to run new high pressure rated fuel line(s). Check your EFI for what it wants for pressure and configuration, mine preferred a return line which also helps cool the TB and fuel.

A 2.8 doesn't have a pump in the tank, it is on the side of the engine. Just delete it and cover the hole with a blockoff plate.

83-84 fuel tanks have a smaller hole for the pickup as EFI did not exist then, to use the OE style in tank pump you need a 85-88 tank with the larger hole.

Here is what I did:

Post in thread 'Aces Killshot Fusion EFI Swap'

Mar 8, 2026

Pulled in the garage ready for the fun to begin...



Right in the feels...



Kind of a side project is making my inop check engine light trigger with the second efan wire from the new ECM. You can set the temps where you want them so I can have the efans kick on around 200* like they do now and have the CEL come on around 220* or so for an added alert



My...

• 85_Ranger4x4

• 

Post in thread 'Aces Killshot Fusion EFI Swap'

Apr 1, 2026

Trying something new... a more tech oriented Youtube channel

• 85_Ranger4x4

• 

Can you show me the stock mechanical pump on the side of the engine?
With key on i can hear a electric pump kick on, im certain its not mechanical. I wonder if my fuel system was already messed with previously.
My fuel inlet line runs from tank to carb

Ill take a gander today at my fuel system, it might already have a inline pump, seeing that the fuel sending unit is apart of the tank and separate from the pump. But i also see some that are both pump and sending unit.

 

[Curious Hound]

nderstandable if i kept the stock sending unit but isnt that part of the pump?

No. The whole assembly is basically a bracket that holds the sending unit and the pump. The pump can be removed or replaced at will while still using the original sending unit.

BUT... go with what 85_Ranger said. He has played with those very components for a while and has it worked out.

 

[ISX_15]

No. The whole assembly is basically a bracket that holds the sending unit and the pump. The pump can be removed or replaced at will while still using the original sending unit.

BUT... go with what 85_Ranger said. He has played with those very components for a while and has it worked out.

Thanks alot! Seems like something i can easily handle was just curious on the fuel pump portion. I’ll utilize his thread for any further questions.
Really do appreciate the quickness guys.

 

[85_Ranger4x4]

Can you show me the stock mechanical pump on the side of the engine?
With key on i can hear a electric pump kick on, im certain its not mechanical. I wonder if my fuel system was already messed with previously.
My fuel inlet line runs from tank to carb

Ill take a gander today at my fuel system, it might already have a inline pump, seeing that the fuel sending unit is apart of the tank and separate from the pump. But i also see some that are both pump and sending unit.

2.8's originally had a mechanical pump towards the front of the drivers side of the engine. It is buried in there and will be hard to see. Follow the fuel lines, where the one that comes up from the rear of the engine on the DS frame rail meets the one that comes down from the carb... that is your fuel pump.

They just had a pickup assembly with the fuel level sender assembly made onto it.

Factory EFI fuel systems had a low pressure pump in the tank feeding a high pressure pump on the frame. What I did was install a high pressure pump on the low pressure hanger like what the 89+ Rangers had (but the fuel tank contour is different and they had different level senders)

If you have a 2.8 with an electric pump someone has been there before and all of this is bogus. You are going to have to figure out what has been done to your truck.

Inline pumps work with a carb but they can be kind of hard to prime, I would suspect that is what you have but who knows.

 

[ISX_15]

2.8's originally had a mechanical pump towards the front of the drivers side of the engine. It is buried in there and will be hard to see. Follow the fuel lines, where the one that comes up from the rear of the engine on the DS frame rail meets the one that comes down from the carb... that is your fuel pump.

They just had a pickup assembly with the fuel level sender assembly made onto it.

Factory EFI fuel systems had a low pressure pump in the tank feeding a high pressure pump on the frame. What I did was install a high pressure pump on the low pressure hanger like what the 89+ Rangers had (but the fuel tank contour is different and they had different level senders)

If you have a 2.8 with an electric pump someone has been there before and all of this is bogus. You are going to have to figure out what has been done to your truck.

Inline pumps work with a carb but they can be kind of hard to prime, I would suspect that is what you have but who knows.

Yeah its definitely been messed with, its just a softline from the carb that goes down to the frame rail to the hardlines. Ill send some photos when i get home