No Boost?!

[GimpyDammit]

Went out for a drive tonight and after boosting up and slowing down noticed a weird whine comming from the passengers side at the front, sounds like a supercharger. Pulled over and had a look around, then while demonstrating the sound to people I was with I noticed that it wasn't making any boost.

Gauge would get to 0 and then it would whine.

Had another look around and noticed a vacumn line that goes to a canister near the air filters was off. Reconnected it but it didnt fix.

Car is a r32 gtr running twin trust t517z's with a hks evc 4 ebc.

I was thinking bov's or wastegate actuators, but a mate thought it could be a split intercooler pipe.

Did manage to get it to boost a little, but only like 0.1 bar.

Anyone have any ideas?

-Michael-

[JMW]

Almost sounds like a hose has blown off. Was it puffing black smoke out the exhaust?

[omega36]

If its a whistling sound my guess would be intercooler piping has popped off somewhere and leaking boost (hopefully not split, or something worse).

Last time this happened to me the piping had popped off the 'Twin Turbo' cooler pipe.

[GimpyDammit]

Almost sounds like a hose has blown off. Was it puffing black smoke out the exhaust?

No smoke, the car is running just like normal, just no boost

I'm going to have a look at the piping today and if i can't find anything i'll chuck it on a hoist at work and have a better look.

[GimpyDammit]

Had a look at the intercooler pipes today and the intake pipes. Had a feel around and pulled at them couldn't find anything obviously wrong.

Could it be bov's stuck open or somthing like that?

[Strik3r]

somewhere between your turbos and your engine is an intake leak.. could be BOV's stuck open, could be intercooler piping, could be one of the VAC lines that runs to your boost controller, fuel pressure vac line, etc. etc. start from your turbo's and work your way over to the engine. Might be easier if you remove the front bar.

[GimpyDammit]

Had a look today at work and couldn't find anything wrong with the cooler pipes, gave them a tug and no movement.

Also had a general look around and nothing really wrong.

Any other ideas?