The spark plug wire sequence for a 1993 Chevy Lumina Euro with a 3.1-liter engine is 1-2-3-4-5-6. The firing order is 1-6-5-4-3-2, with cylinder number 1 located at the front of the engine on the driver's side. The spark plug wires should be connected to the distributor cap in this specific order to ensure proper engine operation.
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