Technical Service Bulletin Low Boost Pressure Reading

Subject: Low Boost Pressure Reading    Models: 911 Turbo ALL

Bulletin Number: 78 – 05

If boost pressure gauge reads low, especially at high ambient temperatures, boost gauge sending unit may not be properly vented.

  • Remove boost pressure gauge sending unit
  • Drill 1.0 mm (No. 60 drill) hole into metal of sending unit so that hole faces downward when sending unit is installed.

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