Join Date: Mar 2001
Location: seattle wa usa 206.789.6800
78/79 930s had an obnoxiously high cold idle anyway. (after restarting warm after sitting a short while also). using a AAR from an SC helps a lot. we used to do that at the dealer in the 70s. winter to summer temps can require some minor mixture and idle speed tweeks. have you tried just turning down the idle speed when it's hot and checking the CO?
www.johnwalkersworkshop.com 206 789 6800
7613 greenwood ave n seattle wa 98103