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Thread: Help with EFI

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    Default Help with EFI


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    Ok so I want to convert my sprinter from twin webers to efi, just to make sure I havent forgotten anything which specific parts do I need for the conversion? Ecu, Injectors etc..

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    Senior Member adam's Avatar
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    When going from a 4k to 4age, I needed

    - Lifter pump
    - High pressure pump
    - Thicker fuel lines
    - Fuel rail with fuel pressure regulator
    - Injectors
    - Wiring
    - ECU
    - Fuel filter


    I think that's it on the fuel side of things.

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    make sure you've got all the required sensors and loom plugs - tps should come with throttle body, intake air temp sensor, cold start injector & switch (if you choose to run it).

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    with the fuel lines they need to be changed to be an efi specific type, thats for the rubber ones as the steel lines on the body are fine. Also use a fuel clamp specificly for efi
    My website: SQ Engineering - 4AGE and 3SGE upgrade/replacement parts

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    You don't necessarily need to convert the hard lines to a larger size, if you run a surge tank in the engine bay and run a low pressure pump to fill the surge tank it will work fine. It just not a good idea to put an EFI pump at the tank end and have it pushing through carbie fuel lines.

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    Hmm.. I see, so say If I were to get an 4age 20valve blacktop engine (including the manifolds) to replace my current engine then I still should be able to run the standard ECU from that engine right? What else should I need/replace if I were to do as such? My flywheel, gearbox and clutch shouldn't be an issue..

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    You're going to have the dizzy headache.... unless you relocate the dizzy or find a DLI conversion you'll have to run an aftermarket computer.

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    Ahh I see.. So I guess I'll need an aftermarket computer, other then that what else would I need to replace for my car to be kept up with the engine swap? Just want to see some of my options before I change anything to my car.. I'm not sure if I should convert my engine to EFI or replace the whole engine in total.. What do you guys think? My engine atm is a 1.8 Litre bottom end 7A Block with a 4AGE Head running on twin webers.

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    Is think you're best off selling the entire engine as a package and start a fresh with an EFI motor. You'll probably break even assuming you do the work yourself.

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