How do you change spark plugs on ford 1998 e-350 van?

To change the spark plugs on a 1998 Ford E-350 Van, start by ensuring the engine is cool and disconnect the negative battery cable. Remove the ignition coil or spark plug wires carefully to avoid damage, then use a spark plug socket and ratchet to unscrew the old spark plugs. Check the gap on the new spark plugs, install them, and tighten them to the manufacturer's specifications. Finally, reconnect the ignition coil or spark plug wires and the battery cable.