Problem Description and Possible Solution
The Ford F-150 is known for intermittent rough idling, which may be accompanied by illumination of the check engine light, and poor fuel mileage.
This may be caused by the EGR sensor sticking, causing the EGR valve to stay slightly open, and diagnostic testing must be conducted.
The EGR valve and sensor must be replaced together to correct this concern.
Average mileage: 143,474 (11,900–231,057)
Exhaust & Emissions affected: 5.4L V8
21 people reported this problem
Motor starts good but idles rough and has no power until warm but still missing. Codes say plugs#2,4,6,8, too lean and 02bank1 bad. I changed plugs and sensor. Last week I changed EGR valve too but not EGR sensor, where is it?