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