Look on the back of the intake manifold, to the left of center. It may be a rectangular box.
if it has a 3.3 there is no map sensor
Yes.
The map sensor is on the air intake line to the throttle body....
The map sensor on a 1990 Ford 5.8 EFI Bronco is on the passenger side. It is located on the firewall.
MAP sensor
The PCV valve is located under the MAP sensor on a 1990 Pontiac Grand Prix. The MAP sensor is in the upper plenum.
After consulting several sources, someone finally called a local Buick dealer who informed me that a 1990 LeSabre does NOT have a map sensor, it was the Mass Air Flow sensor that needs replacing.
On the firewall on the pass side.
The map sensor is located on the fire wall towards the passenger side right under the wind shield.
Below
passenger side
the map sensor is located on top the intake manifold and reads off map sensor just disconnect wire then get a Philips screw driver and take off then replace and put back on