Looking for some diagnostic advise for the turbo of a 92 legacy sedan, auto, 2.2

Suddenly it doesn't want to go faster than 38 mph. When it hits that speed, the turbo sounds like its dumping and the engine sputters and sometimes stalls.

 

Is the dump valve releasing too soon? What other controls should I check?

Could be a few things. Loose hose in the intake system. Plugged cat. Could also be in limp home mode. Are you getting a check engine light or any codes? Maybe other things as well.

Yeah....is the check engine light on? If so, go to my site and you'll find instructions on how to pull the codes.

 

You may also want to check out www.bbs.legacycentral.org as well.