I have just fitteda boost guage and when I went to plug the pipe on to the little nipple on the whatever it is called that I have to plug it into near the intercooler there was alreadz a grey pipe connected, do I

1) unplug this and connect the new pipe to the Guage

or

2) use the y shaped piece of crappy plastic pipe that came with the guage and connect the 2 pipes and nipple together.

the original pipe is onlz about 6 inches long and connects to something buried under the dump valve where I can"t get to.

Cheers

Steve

If you have to remove a pipe then definitely T-piece it. I don't know what the pipe is for but just disconnecting it isn't a good idea.

Is there another nipple/pipe on the manifold?

The grey pipe probably goes to the dump valve!

yes there is another nipple in front of the one with the pipe on it, it has a rubber bung on it I connected the boost guage to this aswell and as soon as I started the engine the guage went from 0 down to 50 and vibrated lots, I did get Y piece connecter which had a brass restricter in one arm should this go to the guage? or should I just connect the pipe straight to the nipple.

Cheers

Steve

What model have you got. Mines a 00MY, removed a little bit of pipe over nipple on manifold, connected pipe work direct to nipple.

When I start engine vaccum pulls needle down to around 30hg ( I think this is the correct term, stand to be corrected). Only when on full boost do I get what sounds like a vibration from the gauge.

Apart from that no probs.;)

Steve that is exactly what happens to mine as mine is a MY00 also, I have been told that there is supposed to be a restrictor in the pipe which stops the needle vibrating.

What this space:

your boost guage will drop on idle.. it's meant to... give it grieve and it'll be ok... mine was never vibrating though????