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EGR Valve

  1. With engine at idle speed and air cleaner removed, apply 21 in. Hg to EGR valve port. When valve is open, exhaust gases passing through EGR valve and into air crossover should be heard.
  2. When vacuum is bled off, and valve closed, there should be a noticeable reduction of sound. If a sound difference is not heard, remove EGR valve and inspect valve and valve seat. If valve cannot be corrected, replacement is necessary.
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