This video shows the short-term and long-term fixes to the P0492 CEL (Secondary Air Injection System) on a C5 Corvette Z06 (base model is similar).
Intake manifold bolt torque spec: 89 in-lbs
Shop Estimate: $800
Total Cost of Parts: $79
Cost of Tools (Fuel Line Removal & 1" Wrench): $30
Total Saved: $691
Autocross Prep & What Went Wrong:
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