Re: 2004 6.0L "Throttling" at low idle
You have no information listed in your signature or what location. if you are in cold weather regions this is perfectly normal. It is programmed to idle at 950 until coolant temp reaches the operation temp. Similar in operation as the choke in gas motors ( now considered the prehistoric days ). There has been reports recently here on TDS that injectors leak fuel into the cylinder after shutdown.
Kentucky built 2004 Silver F-250 XL Reg Cab PSD, 4X2, bench cloth seat,air conditioning, 6 spd Manual, 3.73 LS,Line-X , FORD receiver, Prodigy brake controller,towing option,( put together on Monday, March 29, del April 9 2004) 62000 miles