Where is the Pcv valve located on a 1998 Buick regal?

Answer 1

On the passengers' side of the car you'll have to lift the plastic cover over the engine and look at the MAP sensor located at the passengers' end of the plastic cover (black in color and held in place by plastic clips--making up the entire MAP sensor assembly).

There are three wires connected to the MAP sensor. Remove the wire assembly first. The MAP sensor is removed by twisting it counter clockwise (a small pair of channel locks might assist in removing it). There is a large spring just under the MAP sensor that pushes down on the PCV valve. Remove the MAP sensor and spring and then you can access the PCV valve. You might need a pair of plyers to remove the PCV valve. Installation of the MAP sensor assembly is done by replacing the spring, putting the MAP sensor assembly on the spring, assure the assembly is in the counterclockwise position and twisting it clockwise to reinstall.