Bought a used 2012 f150 with the 3.5 ecoboost, and I've noticed under normal acceleration ( from stop, city and highway) there's a woosh woosh noise from the drivers side, and when this happens the RPM'S dip and the vehicle has a "jumping" motion, my mechanic has yet to figure out this issue and I figured I'd ask you guys.

 

Just a guess ... but I would check the clamps on the plastic tubes coming from turbos. Maybe there's a leak.