Sorting out my fuel system

Venom · Post by **Venom** » Wed Nov 18, 2009 3:11 pm

Hey guys,
When i had my EJ conversion i was advised to install a pre-pump, swirl pot and a VL turbo (or equivilent) fuel pump. That is all installed in the car currently and i certainly don't have any problems with fuel delivery to the EJ. What i wasn't happy with were two lines running under the car, as i was told they wouldn't fit were the existing fuel lines already run. I am fairly sure now that's not true, and it was done becaue they were extremely busy and my car was taking up too much time/space in their workshop.

18 months later and i'm actually getting off my arse to have a look at those two lines. Closer inspection reveals that one is the wiring for both the efi pump and the pre-pump. Pretty sure this will be easy to redirect through the car body and out of harms way were it is now. what i can't work out is what the other fuel line is for. I have traced all the other hoses at the surge tank and accounted for inlet from the pre-pump/fuel tank, return line to fuel tank, outlet to the EFI pump. So i'm guessing that this other line is a return directly from the injector rail to the swirl pot. Am i correct?

If it is a injector rail to swirl pot return line is there anything stopping me from switching this to the old carby return line to the fuel tank?

I am also considering fitting an EFI fuel tank. If i did could i run the efi pump directly from the in-tank feed and do away with the swirl pot setup completely?

Cheers,
Rhys

Venom · Post by **Venom** » Wed Nov 18, 2009 4:04 pm

Answering some of my own questions...

The other other fuel line running under the car goes directly from the efi pump to the injector rails. Definitely not a injector rail to swirl pot return line

. I think the old fuel tank to carby line is now the return line from the injector rails to the fuel tank. None of the other old fuel system/lines are used, it's all disconnected in the engine bay.

I think i'll just remove the old lines and run the efi fuel line there instead.

discopotato03 · Post by **discopotato03** » Thu Nov 19, 2009 2:36 am

Personally I think the go would have been to get all these bits out of an EFI L Series ie the fuel lines/tank/any breather tubes .

The Bosch pumps VL Turbos use are not really very exciting , enough to reliably feed a 153 Kw turbo 3L six in a very sedate state of tune .

My RX L Series runs one of those pumps and the reason why is they're affordable available and with simple wiring alterations goes straight in - to a factory fuel injected L sedan anyway .

I don't find the factory L sedan tank fuel surge prone but I don't throw my car around violently either .

Your call , cheers A .

Hint , troll the local you pull it wrecker for EFI L wagons .
Also chase the pump wiring up through the floor pan and grab the gromet .

YouTube · Post by **El_Freddo** » Thu Nov 19, 2009 4:31 pm

Pretty much as Disco said - grap all the lines from an EFI subi and use them. The only difficulty I can see is that when I did mine I had the dash removed as well as the fan box, plus my interior, seats and all.

It will be a big effort, but well worth it knowing that you'd have to be doing something very wrong to puncture/squash the fuel lines! The tank swap isn't difficult but is a little fiddly.

Let me know if you need any help with it

Cheers

Bennie