1. Check the Engine:
* Look under the hood: The engine type (like 2.5L, 4.0L) should be stamped somewhere on the engine block.
* Check the VIN (Vehicle Identification Number): This can be used to look up the specific engine in a database.
2. Determine the Fuel System:
* 2.5L engine: These were almost exclusively equipped with carburetors (not fuel injection) in 1989.
* 4.0L engine: This engine, while introduced in 1987, did not get fuel injection until 1991. So, a 1989 Wrangler with a 4.0L would also have a carburetor.
Therefore, a 1989 Jeep Wrangler would likely have a carburetor, not fuel injection.
Let me know if you can tell me the specific engine size, and I can give you a more definitive answer.