On a 1999 Dodge Ram, the firing order varies depending on the engine. You
must know your engine size (e.g., 3.9L, 5.2L, 5.9L) to determine the correct cylinder location for spark plug #3. There's no single answer without that information.
Once you know the engine size, consult a repair manual specific to your vehicle's year, make, model, and engine. The firing order will be listed there, along with a diagram showing spark plug locations.
