Please help Identifying vacuum hose.

[s2_bo]

Hi Guys, am in the middle of something and could really do with some help.

Can anyone tell me if the pipe shown below runs to the ECU or to the rear diff? Its the plasticy one.

IMG_0209.jpg

Its not holding pressure at all and could be my boost leak finally found.

I know my diff look hasn't been working for ages so maybe this really is where that air is escaping.

Thanks in advance.

Bo

[S2central.net]

Darn hard to tell from that photo... Best thing to do is hook one end of that hose in engine bay up to an air line and see where air escapes at the other end.

I posted up a revised view of the 3B vacuum tree this week which you'll find useful.

Paul

[s2_bo]

Thanks Paul, that diagram helped. Its the pink line that is not holding pressure so its the Diff.

Cheers.
Bo

[S2central.net]

A leak in that pink line will give you a boost leak for sure and a diff lock that wont work.

Have you isolated it to that pink hose ?
It could also be a failed 1-way valve under the rear seat. If you've got this far, then you should be able to bottom this one out easily now.

Paul

[s2_bo]

Ill Check the valve under the seat. Might well be that as it seams easier to suck air thorough it than to blow it in.

Thanks again!!!

Bo