To find the correct firing order:
1. Identify your engine: Look for an engine code on a sticker under the hood (often near the radiator support or on the firewall). Common engine codes for a 1994 4Runner include 3VZ-E (V6) and 22RE (4-cylinder).
2. Locate your owner's manual: This is the best resource. The owner's manual will have a diagram showing the firing order and the correct spark plug wire routing.
3. Consult a repair manual: A Haynes or Chilton repair manual specific to your year and engine will also have the firing order and potentially a diagram of the plug wire routing.
4. Search online: Once you have your engine code, search online for "[Your Engine Code] firing order". Many forums and websites dedicated to Toyota 4Runners will have this information.
Once you have the firing order (e.g., 1-3-4-2 for a 4-cylinder), you'll need to:
* Number your spark plugs: Use a marker or tape to number each spark plug (1, 2, 3, etc.) to match the firing order.
* Identify the number on each spark plug wire: Many spark plug wires have a number molded into them; or you might have made marks on them before removal.
* Connect the wires according to the firing order: Connect the wire numbered "1" to the spark plug numbered "1", and so on, following the firing order.
Important Note: If you're not comfortable with this task, it's best to consult a qualified mechanic. Incorrectly routing the spark plug wires can damage your engine.
