hi idle. ISC motor bad, ISC module bad or bad connection. If I remember right, the OVP on that will do it as well. Check the tps for idle switch over, duty cycle exsisting for the isc motor/valve, ovp for blown fuse and sticking linkage.
overheat. t-stat, stopped up radiator, fan clutch, aux fan switch in the intake, relays, fuses or fan motor.
I dont know how far Continential Imports in Gainsville is but Steve is a regular contributor to the forum and seems to be able to fix cars. (a valuable assest these days)
Project Smoker, '87 603 powered wagon
Hauler, 96 CTD can you say torque?
Toy 73 Cougar xr7 convertible
Acme Automotive Inc.