What would cause the turbo to boost in normal driving... no pulling a hill, no pulling a trailer, no load. Sometimes will boost going down a hill.
details from OP comments below:
The check engine light was coming on, codes read that the waste gate needed replaced, we replaced it and now the turbo boosts when just driving normal speed on a straight road with no load or hills... is that normal? Has never done in the past. Why would it boost when going down a hill almost coasting? We are gauging boost when it kicks in like a jet engine starting up.