Extra Fuel Pump Fitting What For??

[camerondownunder88]

Hi,

I was just tiding up my 4K motor I'm about to put into my KE30 and noticed on the fuel pump for it there is an extra outlet my KE30 pump doesn't have.

The 4K is out of a KE70 and the pollution system has been removed. And I belive this line went to a part of the fuel system in the KE70.

So here is a photo of the pump on the 4K:

(the extra outlet is pointing away from the block on the top of the pump)

 

Now the one on my 3K in the KE30 doesn't have this out let yet a blocked hole for one. And both fuel pumps work.

So here is a picture of the one on my 3K for comparison:

So my main question is what is this outlet for and when was it introduced into the corolla?

 

Cameron

[Xany]

its a return line for feeding excess fuel back to the tank.

Edited September 10, 2006 by Xany

[camerondownunder88]

So would it be best to use the pump off my 3K or 4K when I do the engine change?

Cameron

[Xany]

doesnt really matter....i'd be using the 3K one though if you arent going to run a return line.

[Rolla__Boy]

Use the 4K one, and run the return line from the fuel pump into the cabin so you can make a "cool flamethrower" for those annoying cyclists that forget how to use a bike path

[HEKTIC]

bahaha nice (note to self: never ride a bike near Rolla Boy)

[camerondownunder88]

LOL sweet idea Rolla_boy. Wonder what the boys in blue think of it.lol

But at least my Rolla can now do a dump and burn like an F-111...lol

mmmm mach 2.5 corolla...:D