"Carbon deposits may cause the EGR valve to remain open at idle when it should be closed, depending on how far open the valve is, this will cause rough idling or even stalling"
Check your EGR if it has a carbon build-up
if so remove it and clean it,
that should solve your issues.
Let Us Know if that solve your problem!
Monday, October 8th, 2007 AT 12:40 PM