Note On Intermittents
WARNING: This page is about a different car, the 1992 Cadillac Fleetwood and 1992 Cadillac DeVille. However, it is still accessible from the selected car via links, so may be relevant.
Manipulate affected wiring and connectors while observing PCM parameter P.0.2. Apply and release vacuum to MAP sensor vacuum port using a vacuum source. If PCM parameter P.0.2 displays greater than 108 kPa, condition has been induced and cause of intermittent should be repaired. If wiring and connectors are okay, substitute a known good MAP sensor, and retest.