Split pipe

[jammy-pop]

What is the purpose of this little fiddly horrible pipe which I'm going to have to take the plenum off to refit!

[Yellow and Green]

No need to take the intake off. You can reach under it from the back (towards the front of the car) and get it back on the nipple. 

 Mine is more of a formed hose that makes it a bit easier to install. It’s the manifold vacuum for the fuel pressure regulator. 

 Good luck!

 

[jammy-pop]

Thanks Y and G! I need to buy a new hose as I think it split at the regulator end before. That's why it's lost its shape. What are the effects of not having this pipe connected, any ideas?

Steve.

[mike_sekinger]

That's not the right hose arrangement.  It should consist of a formed hardened plastic pipe with rubber clamped ends.

The pipe is your pressure reference for the fuel regulator. It is a rising rate set-up, so the pressure needs to increase with boost.  If you don't have the reference, then you have no increase in pressure.

[jammy-pop]

Thanks Mike, this may be the reason for my misfire at higher revs then 🤔 Will order a replacement pipe. Cheers guys.

Steve.