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Home >> Buick >> 1979 >> Regal Sport >> Repair and Diagnosis >> Engine Performance >> Fuel Delivery >> Turbocharging System >> Testing >> WASTEGATE/Boost Pressure

WASTEGATE/Boost Pressure

  1. Inspect wastegate and actuator assembly for linkage damage. Check condition of hose from compressor housing to actuator, then remove hose.
  2. Connect a hand operated vacuum/pressure pump in series with compound vacuum/pressure gauge, and install in place of plenum-to-actuator hose.
  3. With 3 in. Hg vacuum applied to actuator, rod should move 0.015" (.38 mm). Replace actuator if not operating properly. Check new unit and crimp threads on rod to maintain proper calibration. Remove test equipment. Reconnect plenum-to-actuator hose.
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