Stepper motor housing pipe connection

[IainGriff]

In the process of changing the cam in my 500 and after removing the plenum I noted that there is a pipe connection on the stepper motor housing with no pipe connected to it. The connection is about the same size that would fit the vacuum advance pipe that runs from the dizzy to the plenum air intake. I can't find a pipe/tubing in the area that should run to this stepper motor housing connection, anyone know what its for and what it might connect to ?

[carsy]

You need a small piece of vacuum hose. It runs from the stepper housing to the fuel pressure regulator.

[IainGriff]

Thanks Carsy, that makes sense.

[FlipFlopGriff]

Got some from these guys:
http://www.advancedfluidsolutions.co.uk/3mm-18-id-...
Can't now recall whether it was 3 or 4mm so I think I bought a couple of metres of each.
FFG

[EGB]

IainGriff said:

In the process of changing the cam in my 500 and after removing the plenum I noted that there is a pipe connection on the stepper motor housing with no pipe connected to it. The connection is about the same size that would fit the vacuum advance pipe that runs from the dizzy to the plenum air intake. I can't find a pipe/tubing in the area that should run to this stepper motor housing connection, anyone know what its for and what it might connect to ?

Anybody got a picture of this 'mystery' pipe to pressure regulator? Thanks.