Take it to a trained professional.
To change the spark plugs on a 1999 V10 E350, first disconnect the battery to ensure safety. Remove the ignition coils by unbolting them and disconnecting the electrical connectors. Use a spark plug socket to carefully unscrew and remove the old spark plugs, then install the new plugs by hand to avoid cross-threading, followed by tightening them to the manufacturer's specified torque. Reattach the ignition coils and reconnect the battery, ensuring everything is secured properly.
To change the spark plugs on a 1989 Ford E350 van, first ensure the engine is cool and disconnect the battery. Remove the ignition wires carefully, labeling them for reinstallation, and then use a spark plug socket and ratchet to unscrew and remove the old spark plugs. Before installing the new plugs, check and adjust the gap if necessary, then install them by hand to avoid cross-threading, and tighten them with the socket. Finally, reconnect the ignition wires in the correct order and reconnect the battery.
I believe that the gapping is .044" on this engine.
Not sure what you mean by change the ignition on a diesel, diesel engines don't have spark plugs, spark plus wires, coil, etc.... If you are asking about the ignition switch, it is mounted on top of the steering column on most pre 2000, after that they are located in the steering column.
Each spark plug has its own coil located on the top of each plug
Could be a number of things... bad air filter, fouled spark plugs, weak fuel pump...
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