Hissing.

[Brett]

I get a hissing noise in the cabin when under gentle acceleration (dont know what its like WOT as the engine is not run in yet) is this a normal TII noise, or should I be on the look out for a split hose that escaped my attention?

[turbomaz]

I had the same thing on my Tll found out the main turbo pipe had worked a little loose.
Hope you get it sorted...

[Donato]

Have you got a mechanical boost gauge in the car? If you disconnect the vacuum pipe from the back it makes a sucking/hissing noise when the engine is running... or it may have had a vacuum pipe for one just left under the dash somewhere...

[Brett]

Checked all the pipes in the engine bay, everything is properly sealed (I should bloody well hope so considering I only put it all back together this time last week!) and there are no splits.
 No sign of it having had an after market guage fitted either.

[grinder]

sounds like what mine was doing - but i reckon that it was the boost gauge at fault

[Brett]

The plot thickens....
Just been out and had another look at things, every pipe is fine.

[grinder]

could be worse.....could be my car LOL

[stupid mode]

are you sure its just not the turbo spooling ??

the better half always says mine sounds like a hair dyer ... so it could be something an nothing matey

[Brett]

Nah, its something other than usual turbo sounds, I\'m wondering if its the BOV noise coming through the K&N?

[Oedipus Rex]

dunno about FC\'s but my FD will hiss when the turbo is spooling but I\'m not generating pressure, ie if I have my foot down a little, the BOV stays open so the turbo can keep spooling but not pressurise the sytem. This means when I put my foot down theres bollocks all lag.

Only started to hear it when I put my cones in for the stock air box.

[antnicuk]

i find that if there is a gromet missing or out of place slightly in the firewall the air coming through will hiss as there is quite a lot of air pressure being forced into the engine bay trying to get out.

[Brett]

Well I cant hear the hissing anymore, so unless it comes back I think I\'ll ignore it.  With a history like this cars got it was bound to have a few \'niggles\' running in.