Milwaukee
Active Member
I think something wrong with my 1999 expedition 5.4L. It get really bad mileage in the cold trip and short trips.
What funny thing it get great mileage on LONG TRIP it got 17 mpg at 55-60 mph. I thought it should be 20. I think there issue with engine since I disable egr and had tiny miss that come on randomly. Reason I disable egr because it was still pulling vacuum at idle.
Exhaust pipe had black soot around it.
Here what I notice strange. At idle with hot engine it consume 0.52-0.57 GPH report by scangauge. I thought it was supposed to be 0.30-0.40 GPH.
What funny thing it get great mileage on LONG TRIP it got 17 mpg at 55-60 mph. I thought it should be 20. I think there issue with engine since I disable egr and had tiny miss that come on randomly. Reason I disable egr because it was still pulling vacuum at idle.
Exhaust pipe had black soot around it.
Here what I notice strange. At idle with hot engine it consume 0.52-0.57 GPH report by scangauge. I thought it was supposed to be 0.30-0.40 GPH.