My 2010 Fusion Sport AWD started surging at highway speeds between 60-70mph about two months ago. It surges about every second or so,sometimes it feels about to run out of fuel. You can feel yourself moving back and forth in the seat.No tach or speedo movement. My instinct told me it could have been some bad fuel because it started shortly after a fill up. As the tank went empty it got worse. So filled the tank and added dry gas. Surging quit for about 100 miles,then came back as bad. Filled the tank and added more drygas again. Drove again about 100 miles and surging returned. Now it was surging at low speeds.I took it to the dealer with an almost empty tank and they found no codes. They said that a flight recorder would need to be installed to monitor the issue because the problem could not be replicated. They did however updated the programming of the ECU. I fllled the tank, drove great for 300 miles. Surging back again at any fuel level. Sometimes restarting car will temporarilly stop the surging. Setting the cruze makes the surging worse. Once it starts, it will surge from dead stop. Took it to service today after major surging during 50 mile commute, left run in lot for about 10 min, surging could not be replicated with the mechanic. Go figure! Friday it gets the recorder installed. My take a few tries because it cannot monitor all the functions simultaineously. The mech said that the engine,trans, trac control, or ABS may have to be monitored seperately. Has anyone had this issue or can relate to this problem?