Vacuum related squeal

[L Sandel <ls@xxxx>]

Greetings list,

I have developed a rather annoying vacuum related squealing/whistling
sound... It is difficult to pinpoint, but seems to be coming from in back
of the engine. I checked out as many of the vacuum connections as humanly
possible, but haven't been able to track down the culprit. It seems to only
happen after the engine is warmed up.

So, has this happened to anybody before?

It is REALLY embarrassingly loud. If it were a bit more 'woooosh' and a bit
less 'fweeee', it could at least pass for a blow-off valve until I could fix
it... "Is that a turbo in there?" "Um... sure... yeah... ya hear that?"
Fwooosh....

Thanks for any help,
Luke/#10270