We have changed everything on the motor but when its sitting and idling it runs fine but when you put in gear and drive it within 10min it starts sputtering and cutting out then finally shuts down. I have spent $2000 even been to ford dealer who said was valve spring and it still did it after their repair. the repair supervisor said well its ok to drive like that! Does anyone have any ideas? changed ERG, AirFlow,Cpak, plugs wires, cadiconverts, computer. They even said the exhaust flow hoses where plugged and ford dealer wanted $700 to clean them out, took to a guy said he did it but still doing same thing!