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Home >> Cadillac >> 2013 >> Escalade Base, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 15 (Engine Mechanical - Hybrid (LZ1) - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> Crankcase Ventilation System Inspection/Diagnosis

Crankcase Ventilation System Inspection/Diagnosis

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Crankcase Ventilation System Inspection/Diagnosis

Symptom Correction
External oil leak Inspect for any of the following conditions:
  • Restricted or kinked positive crankcase ventilation (PCV) hose or engine vent hose
  • Damaged, incorrect, or incorrectly installed PCV hose
  • Excessive crankcase pressure
Rough Idle Inspect for any of the following conditions:
  • Restricted or kinked PCV hose or engine vent hose
  • Leaking (damaged) PCV hose
  • Vacuum hoses worn or not properly installed
Stalling or slow idle speed Inspect for any of the following conditions:
  • Restricted or kinked engine vent hose
  • Leaking (damaged) PCV hose
High idle speed Inspect for a leaking (damaged) PCV hose
Sludge in the engine Inspect for restricted or kinked PCV hose or engine vent hose
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