Vacuum leak whistle

[rob350]

I seem to be having a nasty vacuum leak whistle that is intermittent. It’s actually a really loud whistle. It seems to change tone when I grab a hold of the throttle body and move it back and fourth. I have the spearco intercooler, with the adapter plate between the turbo and throttle body. I have replaced the throttle body gaskets twice, the second time using thicker homemade gaskets. I have triple checked my vac. lines, vacuum block has a fresh gasket.. Any suggestions? Kind of a dumb thing to ask but I’m out of ideas.

Thanks

 

[esinger]

I normally buy Carb cleaner and start spraying in areas close to the sound while the car is running. When you hit the spot where the leak is, the RPMs will shoot up.

 

[Chuck Leeper]

Try moving only the throttle blade linkage around. Could be there's a leak where the shaft goes thru the body.