My Auto shop teacher told me it probobly had something to do with the thermastat, so i have no idea, my dads a Service Manager over at Fairlane Ford im just to lazy to go over their and have them play around with it...lol

2002 Cougar 2.5 duratec/ mtx-75 85,0000 Mondeo ST-200 wheels/BFG KDW NT black/black Spec Stage 1 Torsen T-2 Trubendz 2.5 flowmaster dual exaust apexi s-afc II K&N FIPK