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Turbocharger Pressure Check

  1. Disconnect Black turbocharger pressure control hose at wastegate solenoid valve and plug valve nipple. Attach pressure gauge to hose. Drive vehicle and accelerate engine, in 2nd gear, to 3500 RPM or more. Check turbocharger pressure when pressure gauge stabilizes. See TURBOCHARGER PRESSURE SPECIFICATIONS  table.
  2. If pressure gauge reading is more than specified, check wastegate actuator. See DTC P1103 and P1104 in TESTS W/CODES article. Replace wastegate actuator as required. If pressure gauge reading is less than specified, check for malfunctioning wastegate valve, turbocharger pressure leaks and faulty turbocharger.
    TURBOCHARGER PRESSURE SPECIFICATIONS

    Application Pressure psi (kPa)
    Stealth & 3000GT 2.9-8.7 (20-60)
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