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Turbo Pressure Check

  1. Ensure intake air hoses are connected. Install hose, 3-way connector and pressure gauge between intake manifold gas filter and turbo pressure sensor. See Fig 1.
  2. Drive vehicle with engine at 5600 RPM or more with throttle fully open and transmission in 1st gear ("L" range), and note turbo pressure. Turbo pressure should be 8.8-10.8 psi (.62-.76 kg/cm2).
  3. If turbo pressure is less than specified, check intake air and exhaust systems for leaks. If no leaks exist, replace turbocharger assemblies. If turbo pressure exceeds specification, check wastegate actuator hose for leaks or cracks. If no leaks or cracks exist, replace turbocharger assemblies. Remove test equipment.
Fig 1: Checking Turbo Pressure (Turbo)
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