What is the spark plug order on a 2.5L Iron duke engine fiero from decklid passenger to driver sides?

The firing order for a 2.5L Iron Duke engine in a Pontiac Fiero is 1-8-4-3-6-5-7-2. However, that's the firing order, not the plug wire order from a specific location like the decklid.

To determine the plug wire order from the passenger side decklid to the driver's side, you need to physically look at the engine. The plug wires themselves are numbered or color-coded, and their routing follows a specific pattern determined by the distributor cap and engine configuration. There's no single standard for this based on location alone. A diagram in your Fiero's repair manual will be the only reliable way to determine the order from your perspective.