Where is ignition coil d on a 98 crown vic 4.6?

The ignition coils on a 1998 Crown Victoria 4.6L are not individually labeled "A", "B", "C", or "D". They are arranged in two packs of two coils each, mounted on top of the engine, near the spark plugs they serve. To locate coil "D" (assuming you have some other reference that uses this designation), you'll need to:

1. Consult a wiring diagram: A wiring diagram for your specific year and model Crown Victoria is crucial. This diagram will show the precise location and firing order of each coil. You can usually find these online through repair manuals sites (some are free, some are subscription-based) or at a local auto parts store.

2. Trace the wires: If you have a specific wire or component identified as belonging to "coil D," trace that wire back to its source coil.

Without a diagram or other reference clarifying what "D" signifies, it's impossible to pinpoint a specific coil. The coils are visually very similar, and relying solely on visual inspection is not a reliable method for determining which is "D." Using the wrong coil could lead to misfires or engine damage.