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The MAP sensor is located on the throttle body. There are two screws that secure it in place.
Where is the choke sensor on a 1991 Oldsmobile ciera 3.3L
The map sensor is located on the passenger side fire wall.
I would suspect the map sensor is bad.
the map sensor is on a bracket between the firewall & the inside valve cover. it has a 3 wire plug on it & a vacuum hose that goes to it.
It doesn't have a maf sensor, it uses a map sensor.
At the end of your air cleaner tube is a square box with 4 screws and a plug in. This is your mapp sensor
The map sensor is located next to the idler air control valve on the front of the motor on top. It has a vaccume hose hooked to it and one bolt holding it on with a bracket.
Try changing the fuel filter and the map sensor.
low pressure on you MAP sensor clean it or replace it
on the side of your throttle body dont confuse your map sensor they look the same
On he firewall just behind the engine.