Where is the camshaft sensor in a 1991 toronado trofeo 3.8?

The camshaft position sensor (CMP sensor) on a 1991 Buick Trofeo (3.8L) is located on the passenger side of the engine, near the front of the cylinder head. It's usually mounted on the cylinder head itself, facing the camshaft. You'll likely see a single-wire connector plugged into it.

However, pinpointing the *exact* location without a shop manual or a picture of your specific engine is difficult. A shop manual for your year and model would give you the most precise location and details. A picture search online for "1991 Buick Trofeo 3.8L engine" might also help visualize the sensor's general area. Look for a sensor that is somewhat close to the camshaft gear, but not directly on it. It’s a relatively small sensor.