Grant74

iTrader: (10)

As per the title really! On the drivers side, I have the fuel pump and fuel level sender, with the three pipes going into the top, which I think is all I need.

So I dont understand what this is on the passenger side- it looks like another fuel level sender, plus some kind of outlet? i would like to know what this is, and if I can use it as an extra fuel feed to stop fuel surge!



All help appreciated.

Grant

saiklon

The Impreza fuel tank has a hump in the middle for propshaft clearance, as a result, at lower fuel levels, there are effectively two fuel reservoirs divided by the hump. The passenger side therefore has a second fuel level sensor and a 'passive' pump that depends on vacuum generated by the fuel return line to pump fuel to the driver's side.

Grant74

iTrader: (10)

I will have tO have a look and see if something more useful can be done with the passive feed to get the pump pulling fuel from both sides as have a fuel surge issue to resolve

Don Clark

Fuel surge common with less than a 1/4 tank...............

Grant74

iTrader: (10)

That's the best diagram I have seen in ages! I reckon you must be able to use that feed if it goes back into the driver side of the fuel tank

Turbotits

iTrader: (2)

I have a pump both sides. The n/s pump is just pumping straight onto the filter bag of the pump on the o/s. Has cured my surge issues

saiklon

Turbotits, how long have you been running this setup?

I would imagine the passenger side pump would fail quickly if you regularly run at low fuel levels since all the fuel will be on the driver's side of the tank.

Grant74

iTrader: (10)

Im interested to know how you wired it?

Turbotits

iTrader: (2)

ive been running it in there well over a year now. its not perminatly running. i have it wired through a switch so that when im down to a little less than half a tank and giving it some i just hit the switch and its certainly solved my problem. i also do some sprints with pretty tight bends and havent had a problem since fitting

Grant74

iTrader: (10)

How have you put the wires for the pump through the top? That is a fantastic idea by the way!

Grant74

iTrader: (10)

Mean to add do you have any pics of the install?

Turbotits

iTrader: (2)

no pics im afraid. Its pretty staight forward to do. I used a couple of jubilee clips to hold the pump to the tank sender. be carefull not to obstuct the float up and down movement. The wires come through the top. Ive used a small water tight cable grommet and added some extra sealant on top just to be sure. lol The pipe is just run inside the tank from one side to the other and fixed above the o/e filter bag with a simple cable tie. Make sure the fuel pipe you use in the tank is designed to be submersed in fuel. the normal fuel pipe will rot away and clog the fuel filter up. ive made that mistake. lol
Its fiddley to get the pumps in and all secured so as to not obstuct the floats took me a couple of goes to get it just right. but can be done.

a link to the type of grommet ive used. cant remember where i got mine. you wont want to buy these as they come in quantaties of 1000. but gives you an idea of what to look for in the likes of b & q

http://www.mossexpress.co.uk/mss/mss...em&item=464121

just to add you dont need a particurlarly powerful pump on the n/s. i used my old o/e one as i had alread upgraded to a walbro.

Grant74

iTrader: (10)

Thats exactly what I was planning to do- have my walbro mapped to the car, and living in Jersey, getting it remapped isnt the easiest, and is a boat ride etc.

So was thinking oe pump in there, on a switch as you suggest.

When you say you ran pip from one side of the tank to the other, are you talking up or across the car?

Turbotits

iTrader: (2)

across the tank from n/s to o/s but within the tank. no need to have any fuel pipes coming out of the tank other than the originals.

Grant74

iTrader: (10)

I have tried to get some fuel resistant pipe and left it in a tank of fuel overnight as a test- it seems fine but is that long enough to tell?

saiklon

My fuel tank pipes got torn when I was replacing my fuel pump and the mechanic replaced them with random hoses he had lying around, I've not seen any issue - more than 2 years later.

If the pipes can handle the pressure (no swelling when fuel pump is on), they should be good to go.