If it is a gas engine, it is located in the fuel tank.
follow the center wire out of the distributor cap
In a 2004 Ford E-350 : If you have the 4.6 or 5.4 liter GASOLINE , V8 engine : 4 - 8 3 - 7 2 - 6 1 - 5 front of vehicle
The starter relay on a 2003 Ford E350 is typically located in the engine compartment's fuse box, which is found near the battery. Look for a rectangular black relay in the fuse box; it should be labeled for easy identification. If you're having trouble locating it, refer to the vehicle's owner's manual for a detailed diagram.
The Fuel rail is on top of the manifold with a crossover tube at the back of the engine. It may appear to be chrome.
Each spark plug has its own coil located on the top of each plug
check iac motor, or tps sensor for starters. check for tuneup.
What year, which V8?
Where is the jack on a 2003 e350 van
how many o2 sensors on a ford e350 van 2003
1 - 3 - 7 - 2 - 6 - 5 - 4 - 8 Coil On Plug ( C.O.P. ) ignition system The engine cylinder / spark plug locations are numbered : 4 - 8 3 - 7 2 - 6 1 - 5 front
My 2000 E350 has 385 978miles keep the oil changed