i have a 1992 f150 truck with a 302 engine ,,,my problem is that when i start it in the mornings it goes on fast idle for about 30 to 40 seconds then the fast idle cuts out ,it idles very rough and sometimes even stalls ,i was wondering if any one has had this problem and can help me out bye telling me how they fixed it ,,thank you for any help

 

try cleaning the IAC valve on the driver's side of the throttle body. It may be sticking. Also, check for any vacuum leaks.

Robbie