Hello All, I seam to have a problem with my 02 Grand Marq 4.6L. It will stall when idling and my check engine light is flashing. I checked the codes and it is showing low egr flow and excessive egr flow. I changed out the egr valve and it now has a smoother ride and doesn't stall all the time. It's still abit rough when cold and the low and high egr flow codes are still being set in the computer. Any ideas thanks in advance.