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You can give a pull on it. It will go toward the right. Grab a hold of the arm and pull it open. It should move freely with some resistance. Make sure it can do that. Check your BPC and wiring harness. If the harness has come unattached, you will run base boost so boost would be reduced. You could do a quick run with the line disconnected from the WGA but be carefull as the turbo will spool up and boost hard. You will hit a fuel cut. this would be just to check if the WGA is working or if you have BPC problem.


I still say it sounds normal pre-MBC.
 
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