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Home >> Chevrolet >> 2002 >> Impala Police >> Repair and Diagnosis >> External Pages >> Different car >> Section 567 (Engine Mechanical - 3.4L V6 - VIN (E) (La1)) >> Diagnostic Information and Procedures >> Crankcase Ventilation System Inspection/Diagnosis

Crankcase Ventilation System Inspection/Diagnosis

WARNING: This page is about a different car, the 2003 Chevrolet Monte Carlo and 2003 Chevrolet Impala. However, it is still accessible from the selected car via links, so may be relevant.
Crankcase Ventilation System Inspection/Diagnosis

Concern Action
External oil leak Inspect for any of the following conditions:
  • Plugged positive crankcase ventilation (PCV) valve.
  • Plugged or kinked PCV hoses.
  • Damaged or incorrectly installed PCV valve or hoses.
  • Excessive crankcase pressure.
Rough Idle Inspect for any of the following conditions:
  • Plugged PCV valve.
  • Plugged or kinked PCV hoses.
  • Leaking or damaged PCV valve or hoses.
Stalling or slow idle speed Inspect for any of the following conditions:
  • Plugged PCV valve.
  • Plugged or kinked PCV hoses.
  • Leaking or damaged PCV valve or hoses.
High idle speed Inspect for a leaking or damaged PCV valve or hoses.
Sludge in the engine Inspect for any of the following conditions:
  • Plugged PCV valve.
  • Plugged or kinked PCV hoses.
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