Hmm, how long was the tick around for? I have had the tick since about last summer, but it more of a click then a tick. I always brushed it off as a belt or something, but upon further inspection I found it sounds like its comming from the middle of the rear head. Currently I can only hear it at idle. Also my secondaries are currently only opening ocasionally. At first I thought it was from the heat, but now im certain it is mechanical. Im not even 100% its the secondaries but that burst of energy at 3500 is gone most of the time. Im scared that if its not the secondaries I got a bigger problem. I want to take it to Ford since my warranty is almost up but I know im not going to get them to replace anything unless I can get them to tear it apart and look at the bearings, im trying to figure out how to get them to do this. I know if its waranty work its like free money for them so I gotta convince them its worth it somehow.