Is the manifold absolute pressure sensor same thing as mass air flow on a 1998 Chevy s10 2.2l?

No, the Manifold Absolute Pressure (MAP) sensor and the Mass Air Flow (MAF) sensor are two different sensors with different functions on a 1998 Chevy S10 2.2L (or any other engine).

* MAP sensor: Measures the pressure in the intake manifold. This indirectly helps the engine computer determine how much air is being drawn into the engine. It's a crucial part of calculating the air/fuel mixture.

* MAF sensor: Directly measures the *mass* of air flowing into the engine. This is a more precise measurement than what the MAP sensor provides.

While both sensors contribute to engine control, they provide different types of data. A 1998 Chevy S10 2.2L likely uses a MAF sensor, not just a MAP sensor. The engine computer uses the information from both (or one, if only one is present) to control fuel injection and ignition timing.