92' Firebirds either had a 6 cylinder or a v8.
Engine code L03 (305ci V8) 140-160 rear wheel horsepower.
92' Trans Am's had a choice of v8's
Engine code LG9 (305ci V8) 170-200 rwhp.
Engine code...
If you are talking about you ECM( the computer that runs the engine) it is under the dash on the pass. side. You will need a 7mm socket to take the under dash paneling off before you see it