Question about Buick LeSabre
On the Buick Le Sabre the MAP sensor is located near the front of the engine. As you face the engine from the front, it's on top of an approximately 3 inch high tube near the bank of coils. The tube houses the PCV valve. The MAP sensor is on top of the tube..
Posted on Jan 02, 2011
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Posted on Jan 02, 2017
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Mar 19, 2016 | Cars & Trucks
Aug 25, 2014 | Cars & Trucks
Working of Manifold Absolute Pressure (MAP) Sensor...
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Nov 23, 2012 | Cars & Trucks
Fig. Fig. 3: MAP sensor location-3.3L and 3.8L engines
The PCM supplies 5 volts of direct current to the Manifold Absolute Pressure (MAP) sensor. The MAP sensor then converts the intake manifold pressure into voltage. The PCM monitors the MAP sensor output voltage. As vacuum increases, the MAP sensor voltage decreases proportionately. Also, as vacuum decreases, the MAP sensor voltage increases proportionally.
With the ignition key ON , before the engine is started, the PCM determines atmospheric air pressure from the MAP sensor voltage. While the engine operates, the PCM figures out intake manifold pressure from the MAP sensor voltage. Based on the MAP sensor voltage and inputs from other sensors, the PCM adjusts spark advance and the air/fuel ratio. The MAP sensor is mounted to the intake manifold, near the throttle body inlet to the manifold. The sensor connects electrically to the PCM.
Fig. Fig. 4: Disengage the MAP sensor connector-3.0L engine shown
WARNING When testing the MAP sensor, make sure the harness wires do not become damaged by the test meter probes.
Fig. Fig. 7: Using a digital volt-ohmmeter, test the MAP sensor voltage-3.0L engine shown
REMOVAL & INSTALLATION
See Figures 1, 2, 3 and 4
The MAP sensor is mounted on the intake manifold near the throttle body inlet to the manifold.
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