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176 Posts
I took my car in to see if they could reprogram the PCM because my rpm idle last 5 minutes. What they told me is that when the colder it gets outside the longer the rpm idle will last because here in Chicago it gets real cold, so, yeah warming the car first is a good idea, but the service guy told me that Ford just resently told them to stop reprograming the PCM or TCM to the latest calibration. Until the car detects that something is wrong, than afterwards they could do something, but yeah Ford told every dealer to stop doing that. I dont know if he was lying or telling the truth, maybe someone in here could give me a heads up?