My wastegate tee connector was knocked loose at the dealer about three months ago and my car was out of control. I returned to the dealer and they found it. After the ECU reprogram I removed it to see what they did to the computer. If you pull the Vac/boost line off your wastegate you can only get 12.5 psi of boost max. Before I could hit 18psi. So Mazda did more than just a timing fix. Somebody else try it. I am back to stock at 6 psi. Car runs better overall.