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Model Years Affected: 1991, 1992, 1993, 1994
Engine Affected: 3.1L V6
The PCV vacuum hose under the upper intake plenum may become brittle and crack causing an engine vacuum leak.
Q&A > Pontiac > 1994 Pontiac Sunbird
Common Problems > Pontiac Sunbird
Q&A > Pontiac > 1992 Pontiac Sunbird