Engine Mgmt., Fuel, Spark, EGTs, & Air/Fuel Ratios
88 Shelby Z TII. When cold, it idles high as it should and comes down as it warms up. Thing is, when its cold and you give it some throttle and let off, it drops to about 400 rpm, tries to stall but doesn't, then recovers back to high idle. Its fine once its warmed up. What may cause this?