I read that there were several problems with spark plugs and heads including one that extended to 2004 trucks but the latest word in this forum was that E series is not afflicted. That seems strange to me - why would ford make different engines for trucks and vans? Mine has 111 000 km right now. My trusty mechanic said no rush wait for the Ford suggested mileage to change them, which I think is 100 000 miles or 140 000 km. Lately we’ve only been doing 5 to 10 thousand km per summer so it could well be 4 or 5 years.
Of course I don’t know but it seems prudent for a 67 year old school teacher who changed his own sparkplugs for 45 years, most recently our good old 1992 GM van with 350 v8, to rely on a mechanic with the E350. For one thing, I have never seen a coil on a spark plug.
This guy had trouble with a 2005.
Sunlinecforum post This RV.net thread mentions .
Problems with plugs up to 2008.
