Fuel pipe - where does it go?!!

[itiejim]

I've got the engine back in the car now and am nearly ready to fire it up. However, there's a fuel pipe left over and I am struggling to work out where it goes...

It's one of the ones from the 4 way union at the back of the engine (4.5). My understanding is that one of the pipes is the feed, then one goes to the base of each set of throttle bodies as a purge. But - where does the other one go?

Any assistance gratefully received so that I can go and fire her up!

[JensenA]

Front of the Engine or the back of the engine?

[itiejim]

Back - I think it's a vacuum actually - and that it goes on the bottom of the airbox.

Just off to check!

[JensenA]

I couldn't find a 4 way union at the back of my engine