Tim, start by getting the fault codes read on the vehicle, I have a code reader and ain't too far from you if you want to try it, from the fault codes you can then have a better idea of whats wrong.
Cooling fan running on, does your temp gauge get to the three o'clock position as normal or is it sitting low? (Thermostat jammed open is a possible)
ETS and rough idle is probably the ETM pots worn out but fault codes will confirm this.
PM me if you want to meet up to try the fault code reader on your vehicle - Mike
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