bought an 86 iroc a couple months back. car had been sitting for a while. all original 305 auto with 57,000 on the clock. idled rough as a corn cob. drove it home and changed plugs, cleaned the throttle body, adjusted the tv cable, changed the thermostat, changed the cold start switch, and changed the temp control sensor. baby runs like new from the factory now. all thanks to the great info i gathered from here. keep up the good work gentlemen!