Recent content by Bronco2forlife

Its bone stock. No issue once warm, it is just the initial startup period after a cold start. Goes into high idol for 1-2 minutes, drops down and runs rough for 20-30 seconds then reestablishes idol. Runs fine after that. I'll check on the IAC.

5.0l runs fine other then cold start, after about 30 seconds it drops down into low idol and runs rough for about 15-20 seconds. After this is will correct itself and run fine, it only happens during a cold start. If I am driving and not parked it corrects itself faster. Have tried the coolant...