However, simply knowing the firing order isn't enough to correctly install the spark plug wires. You absolutely must refer to a diagram specific to your vehicle's engine. The distributor cap and the plug wire locations on the engine will vary slightly between models, even within the same year.
Where to find the correct diagram:
* Your owner's manual: This is the best place to start.
* A repair manual specific to your 1991 Dodge Dakota 3.9L: Chilton's or Haynes manuals are good choices. These usually have clear diagrams showing the correct wire routing.
* Online resources: Websites like AutoZone, Advance Auto Parts, or others with repair information often have diagrams. Be sure to specify the exact year, engine, and any other relevant details (like whether it's a 2WD or 4WD).
Warning: Incorrectly installing spark plug wires can lead to misfires, poor engine performance, and even engine damage. Take your time, and if you're not comfortable doing it yourself, consult a mechanic.
