idle: clean out the valve with carb cleaner, you will need a whole can to get all the crap out. also run a few cans of fuel injector cleaner in the next few tanks so all your injectors are getting the right flow.
interoir: bentley manual is a huge help with the center console, as its a total bitch to remove (i still havent put mine back in!)
coolant: replace the sensor.
Alusil, Dinan DME | ITG Air Filter | Eibach/Bilstein HD | 26/20 Swaybars | Iridium plugs | Depo/ProLumen HID | Optima batt. | no AC | Stoptech brake lines, Frozen rotors, brass bushings, Superblue