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Troubleshooting Low Boost

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Underboost is a condition that can be caused by several issues including:

  1. Bad TCV
  2. Bad Turbocharger
  3. Failed boost sensor (for models that have them)
  4. ECU seeing overboost and cutting back until reset and condition remedied
  5. Failed MAF (for ecu’s that use the MAF to determine boost pressure)
  6. Failed atmospheric sensor ( again for those that use it)

Less boost after wastegate adjustment

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