1980 turbo trans am

[dark toni]

The turbo on my car has a whine when you step on it. A mechanic at the Pontiac dealership says I need a new actuator, but we can't find tha part anywhere or even find the part number. Can anyone help me find the part or some info on where to get it

 

[Peter]

Try this.

http://www.bramall-turbo.com/FullAutoByMake_1Page8.html

 

[b4black]

A whine like a police siren could be normal or a sign of an unbalance rotating assembly. If it were a bad actuator, I would expect a hissing like an air leak, becuase that's what it would be.

You can check the actuator be removing it and applying pressure to one port (the one connected to the compressor's outlet) to make the rod come out. The other port should be connected to vacuum at the plenum, but I recommend disconnecting and capping it off (it doesn't do anything, but usually leaks).

Also, a boost gauge will tell you if the actuator is doing it's job or not.