2003 Ford Expedition XLT 4Cyl4.7L - Transmissions & Drivetrains
Towing power loss on 2003 Ford Expedition 4.6L. Engine idles great, runs strong, no codes. EGR vacuum lines blow off.
160,000 miles. No check engine lights, downshifts smooth while passing on flat surfaces in FL, On trips towing boat up hills in GA it peaks at 3800rpm excelleration and looses power to 35-45mph. the larger EGR vacuum line keeps blowing off and is too hot to touch. Tie-wraps hold lines on, but no towing ability. vacuum lines all seem free of cracks.