Where is the tps on a 98 camaro?

The Throttle Position Sensor (TPS) on a 1998 Camaro is located on the throttle body. The throttle body itself is mounted on the intake manifold. You'll need to access it from the top of the engine bay. It's a relatively small sensor with a wiring harness connected to it. It's usually attached to the side of the throttle body, but the exact position might vary slightly depending on the engine (V6 or V8).