Q&A

where is the other one located

Don't know for certain but may not have another one. Coolant temperature sensor may also control your guage as well. Tried to look up part online but didn't give another listing.

Why you ask anyway- what's the problem?

we have a2001 chevy blazer that noone seems to know what the problem is with this vehicle. one person says the computer, another person says that the other sensor that controls the main computer is gone. another person says that it is the wiring. when it gets to 180 it starts to run bad. we have changed everything twice brand new stuff starting with the fuel pump and sending unit all the way up to the engine. cap rotor plug wires spider regulator temp sensors o2 sensors cleaned out the converters. and it still runs bad

Did you replace the coolant temp sensor? Is check engine light on?

we have replaced that also. so we just replaced the map sensor and it seems like it runs better. what does a map sensor do and will it relearn it self. why does it seem like it still wants to stall

The manifold absolute pressure sensor provides instantaneous manifold pressure information to the engine's electronic control unit (ECU). The data is used to calculate air density and determine the engine's air mass flow rate, which in turn determines the required fuel metering for optimum combustion (see stoichiometry) and influence the advance or retard of ignition timing.