83 305 "H" engine, 47,000 miles . Starts great and runs strong on cold startup. When choke opens stalling and low ( or high) idle problems. Poor performance and stumbling just off idle. Choke opens and works as designed but the throttle idle solonoid seems to work intermittently. one minute your 650RPM in drive (auto) and then it stumbles and stalls. Once warm it becomes very undrivable. Stalls when you come to stop. Starts at touch of key but drop it in drive and stumbles and stalls. this is a 100% stock , original car with Q-Jetcarb #17083526.