Required Service
WARNING: This page does not describe the selected car, but rather 34 other vehicles, including the 1991 Pontiac Sunbird, 1991 Pontiac Grand Prix, 1991 Pontiac Grand Am, 1991 Pontiac Firebird, and 1991 Pontiac Bonneville. However, it is still accessible from the selected car via links, so may be relevant.
The PCV system may require service for obstructions if any of the following conditions exist:
- Rough Idle
- Stalling or Slow Idle Speed
- Oil Leaks
- Oil in Air Cleaner
- Sludge in Engine
A leaking PCV valve or hose could cause:
- Rough Idle
- Stalling
- High Idle speed
If engine idles roughly, check for clogged PCV valve or plugged or broken hoses BEFORE adjusting idle. Check PCV valve application to ensure the correct valve is fitted. Replace PCV valve if required.