2003 Ford Excursion will sporadically not start. When this happens, it will crank but will not fire. It will not start with a jump start. Typically, after several tries the battery will drain. At that point it will start with a jump start. It also usually starts after it sits for at least 1 day. This sporadic incident has been occurring over 6 months. I've had it checked 4 times by a trusted and capable auto service center. They have run comprehensive diagnostics, reviewed every possible source of the problems, have researched every possible issue and have found nothing. Otherwise the vehicle runs well - when it starts. The latest incident was today Feb. 24, 2010. This has occurred at least 10 times in 6 months.

- Nokesville, VA, USA

Spark plug blown out of 8th cylinder of V10 Ford Triton.

- Mt. Clemens, MI, USA

Over the last 1 1/2 year, veh dies and wont restart or slower to start eventually will not start. All gauges go full tilt, ABS light comes on, loss of all electrical systems, will not restart, just clicks, then nothing. Have to disconnect and fully recharge batteries to restart, ,,, then, ,,, problem recurs in few weeks. New batteries 11/07, cam shaft sensor replaced 3/07. Code P0603.

- Lakeside, AZ, USA

Spark plug blow out on 2003 Ford Excursion limited V-10 gas engine. This was spark plug on driver's side, rear of engine, closest to dashboard. Pulled head and found three of the remaining four threads to be worn. Considered same issue could be present on other side of engine, so replaced engine. Engine had approx. 106K miles. Was driving about 25 mph when problem occurred.

- New Orleans, LA, USA

Crank position failure, pn F7tz12K073A, at 80,000 miles on the 2003 Ford Excursion 7.3 ltr diesel. Back up sensors failed intermittantly.

- Fenton, MI, USA

: the contact stated while driving 60 mph on normal road conditions, the check engine light illuminated intermittently and then remained illuminated. The illuminated light indicated the cam shaft was off center which created undesirable emissions. The epa was contacted who declared it should be under warranty for 5 years or 50,000 miles however the manufacturer refused repair the defect without a cost.

- Littleton, CO, USA