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Home >> GMC >> 1987 >> Forward Control 6.2 J, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Air Injection System - Vehicles Over 8500 GVW >> Component Testing >> Hoses & Pipes

Hoses & Pipes

  1. Inspect all hoses and pipes for holes or deterioration. Inspect for loose pipe connections and clamp tightness. Check for correct hose and pipe routing.
  2. If a leak is suspected on pressure side of system or if a hose has been disconnected, use soapy water solution to check for leaks. With air pump running, bubbles will form if leak exists.